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000
FXUS66 KMTR 281802
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1102 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 9:45 AM PDT SATURDAY... A DRY COLD FRONTAL
BOUNDARY IS MOVING ACROSS NORTHERN/CENTRAL CALIFORNIA THIS MORNING
TO REPLACE THE EXITING HIGH PRESSURE RIDGE. STRATUS PUSHED INLAND
BETWEEN 5-6PM YESTERDAY... BUT A STRONG NORTHERLY GRADIENT ERODED
MUCH OF THE STRATUS DECK OVERNIGHT. 24 HOUR TEMPERATURE
DIFFERENCES ARE A MIXED BAG THIS MORNING AS A RESULT OF UNEVENLY
DISTRIBUTED OVERNIGHT/EARLY MORNING CLOUD COVER. THE BAY AREA IS A
LITTLE WARMER THIS MORNING DUE THE LINGERING CLOUDS. TEMPERATURES
TODAY WILL BE SIMILAR TO YESTERDAYS READINGS...EXCEPT ALONG THE
COAST AND IN SAN BENITO COUNTY. WARMER TEMPERATURES ARE EXPECTED
ALONG THE COAST WHERE OVERCAST CONDITIONS KEPT TEMPERATURES COOLER
YESTERDAY... AND COOLER TEMPERATURES ARE EXPECTED IN SAN BENITO
COUNTY AFTER INTENSE SUBSIDENCE ALOFT YESTERDAY. TEMPERATURES WILL
TREND WARMER INTO TOMORROW WITH MID 70S TO AROUND 80 FORECAST FOR
MOST INLAND LOCATIONS.

TEMPERATURES ARE FORECAST TO COOL THROUGH MIDWEEK NEXT WEEK. COOL
IS A RELATIVE TERM HOWEVER AS TEMPERATURES WILL STILL BE A FEW TO
SEVERAL DEGREES ABOVE NORMAL. IN CASE YOU MISSED IT... 2015 HAS
BEEN THE WARMEST WINTER ON RECORD FOR CALIFORNIA ON RECORD (AS OF
THE END OF FEBRUARY... BUT MARCH IS ON PACE TO BE THE WARMEST
AS WELL). THE COOLING WILL COME AS A LOW PRESSURE SYSTEM PASSES
WELL TO THE NORTH OF OUR FORECAST AREA. NO PRECIPITATION IS
EXPECTED THROUGH THE END OF THE MONTH IN OUR AREA AT THIS TIME.

CURRENT FORECAST APPEARS ON TRACK... SO NO MAJOR UPDATES PLANNED
UNTIL THE AFTERNOON UPDATE.

&&

.AVIATION...AS OF 11:02 AM PDT SATURDAY...MAINLY CLEAR SKIES WITH
VFR CONDITIONS THIS AFTERNOON AND EVENING. SOME GUSTY NW WINDS
POSSIBLE AT KSFO WITH GENERALLY LIGHT WINDS ELSEWHERE. GIVEN STRONG
NORTHERLY GRADIENT EXPECTING MOSTLY CLEAR SKIES OVERNIGHT AT THIS
TIME.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THIS AFTERNOON AND EVENING. AT
THIS TIME EXPECTING MOSTLY CLEAR SKIES OVERNIGHT BUT WILL REASSESS
FOG CHANCES WITH 00Z PACKAGE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 11:02 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: RWW

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
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000
FXUS66 KMTR 281802
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1102 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 9:45 AM PDT SATURDAY... A DRY COLD FRONTAL
BOUNDARY IS MOVING ACROSS NORTHERN/CENTRAL CALIFORNIA THIS MORNING
TO REPLACE THE EXITING HIGH PRESSURE RIDGE. STRATUS PUSHED INLAND
BETWEEN 5-6PM YESTERDAY... BUT A STRONG NORTHERLY GRADIENT ERODED
MUCH OF THE STRATUS DECK OVERNIGHT. 24 HOUR TEMPERATURE
DIFFERENCES ARE A MIXED BAG THIS MORNING AS A RESULT OF UNEVENLY
DISTRIBUTED OVERNIGHT/EARLY MORNING CLOUD COVER. THE BAY AREA IS A
LITTLE WARMER THIS MORNING DUE THE LINGERING CLOUDS. TEMPERATURES
TODAY WILL BE SIMILAR TO YESTERDAYS READINGS...EXCEPT ALONG THE
COAST AND IN SAN BENITO COUNTY. WARMER TEMPERATURES ARE EXPECTED
ALONG THE COAST WHERE OVERCAST CONDITIONS KEPT TEMPERATURES COOLER
YESTERDAY... AND COOLER TEMPERATURES ARE EXPECTED IN SAN BENITO
COUNTY AFTER INTENSE SUBSIDENCE ALOFT YESTERDAY. TEMPERATURES WILL
TREND WARMER INTO TOMORROW WITH MID 70S TO AROUND 80 FORECAST FOR
MOST INLAND LOCATIONS.

TEMPERATURES ARE FORECAST TO COOL THROUGH MIDWEEK NEXT WEEK. COOL
IS A RELATIVE TERM HOWEVER AS TEMPERATURES WILL STILL BE A FEW TO
SEVERAL DEGREES ABOVE NORMAL. IN CASE YOU MISSED IT... 2015 HAS
BEEN THE WARMEST WINTER ON RECORD FOR CALIFORNIA ON RECORD (AS OF
THE END OF FEBRUARY... BUT MARCH IS ON PACE TO BE THE WARMEST
AS WELL). THE COOLING WILL COME AS A LOW PRESSURE SYSTEM PASSES
WELL TO THE NORTH OF OUR FORECAST AREA. NO PRECIPITATION IS
EXPECTED THROUGH THE END OF THE MONTH IN OUR AREA AT THIS TIME.

CURRENT FORECAST APPEARS ON TRACK... SO NO MAJOR UPDATES PLANNED
UNTIL THE AFTERNOON UPDATE.

&&

.AVIATION...AS OF 11:02 AM PDT SATURDAY...MAINLY CLEAR SKIES WITH
VFR CONDITIONS THIS AFTERNOON AND EVENING. SOME GUSTY NW WINDS
POSSIBLE AT KSFO WITH GENERALLY LIGHT WINDS ELSEWHERE. GIVEN STRONG
NORTHERLY GRADIENT EXPECTING MOSTLY CLEAR SKIES OVERNIGHT AT THIS
TIME.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THIS AFTERNOON AND EVENING. AT
THIS TIME EXPECTING MOSTLY CLEAR SKIES OVERNIGHT BUT WILL REASSESS
FOG CHANCES WITH 00Z PACKAGE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 11:02 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: RWW

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 281646
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
946 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 09:45AM PDT SATURDAY... A DRY COLD FRONTAL
BOUNDARY IS MOVING ACROSS NORTHERN/CENTRAL CALIFORNIA THIS MORNING
TO REPLACE THE EXITING HIGH PRESSURE RIDGE. STRATUS PUSHED INLAND
BETWEEN 5-6PM YESTERDAY... BUT A STRONG NORTHERLY GRADIENT
ERODED MUCH OF THE STRATUS DECK OVERNIGHT. 24 HOUR TEMPERATURE
DIFFERENCES ARE A MIXED BAG THIS MORNING AS A RESULT OF UNEVENLY
DISTRIBUTED OVERNIGHT/EARLY MORNING CLOUD COVER. THE BAY AREA IS A
LITTLE WARMER THIS MORNING DUE THE LINGERING CLOUDS. TEMPERATURES
TODAY WILL BE SIMILAR TO YESTERDAYS READINGS...EXCEPT ALONG THE
COAST AND IN SAN BENITO COUNTY. WARMER TEMPERATURES ARE EXPECTED
ALONG THE COAST WHERE OVERCAST CONDITIONS KEPT TEMPERATURES COOLER
YESTERDAY... AND COOLER TEMPERATURES ARE EXPECTED IN SAN BENITO
COUNTY AFTER INTENSE SUBSIDENCE ALOFT YESTERDAY. TEMPERATURES WILL
TREND WARMER INTO TOMORROW WITH MID 70S TO AROUND 80 FORECAST FOR
MOST INLAND LOCATIONS.

TEMPERATURES ARE FORECAST TO COOL THROUGH MIDWEEK NEXT WEEK. COOL
IS A RELATIVE TERM HOWEVER AS TEMPERATURES WILL STILL BE A FEW TO
SEVERAL DEGREES ABOVE NORMAL. IN CASE YOU MISSED IT... 2015 HAS
BEEN THE WARMEST WINTER ON RECORD FOR CALIFORNIA ON RECORD (AS OF
THE END OF FEBRUARY... BUT MARCH IS ON PACE TO BE THE WARMEST
AS WELL). THE COOLING WILL COME AS A LOW PRESSURE SYSTEM PASSES
WELL TO THE NORTH OF OUR FORECAST AREA. NO PRECIPITATION IS
EXPECTED THROUGH THE END OF THE MONTH IN OUR AREA AT THIS TIME.

CURRENT FORECAST APPEARS ON TRACK... SO NO MAJOR UPDATES PLANNED
UNTIL THE AFTERNOON UPDATE.

&&

.AVIATION...AS OF 4:41 AM PDT SATURDAY...THE CURRENT IR SATELLITE
IMAGE IS SHOWING THE TAIL END OF A COLD FRONT PASSING JUST NORTH
OF THE SAN FRANCISCO BAY AREA. COOL DENSE AIR IS FILLING IN BEHIND
THE FRONT RESULTING IN MODERATE TO STRONG NORTHERLY WINDS OVER THE
COASTAL WATERS. THESE WINDS ARE MIXING OUT THE MARINE STRATUS THAT
IS TYPICALLY OBSERVED ALONG THE COAST. WINDS AT ABOUT 5000 FEET
ARE EXPECTED TO BE OFFSHORE TODAY WHICH WILL ALSO AID IN
PREVENTING STRATUS FROM FORMING IN THE SAN FRANCISCO BAY AREA. LOW
CLOUDS AND FOG ARE BEING OBSERVED IN THE MONTEREY AND SALINAS AREA
BUT ARE THIN AND SHOULD MIX OUT QUICKLY THIS MORNING.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR CONDITIONS ARE EXPECTED TO
PREVAIL THIS MORNING BUT ARE ANTICIPATED TO IMPROVE TO VFR AT KMRY
BY AROUND 1600Z AND 1800Z AT KSNS. WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT
POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 09:16 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 281646
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
946 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 09:45AM PDT SATURDAY... A DRY COLD FRONTAL
BOUNDARY IS MOVING ACROSS NORTHERN/CENTRAL CALIFORNIA THIS MORNING
TO REPLACE THE EXITING HIGH PRESSURE RIDGE. STRATUS PUSHED INLAND
BETWEEN 5-6PM YESTERDAY... BUT A STRONG NORTHERLY GRADIENT
ERODED MUCH OF THE STRATUS DECK OVERNIGHT. 24 HOUR TEMPERATURE
DIFFERENCES ARE A MIXED BAG THIS MORNING AS A RESULT OF UNEVENLY
DISTRIBUTED OVERNIGHT/EARLY MORNING CLOUD COVER. THE BAY AREA IS A
LITTLE WARMER THIS MORNING DUE THE LINGERING CLOUDS. TEMPERATURES
TODAY WILL BE SIMILAR TO YESTERDAYS READINGS...EXCEPT ALONG THE
COAST AND IN SAN BENITO COUNTY. WARMER TEMPERATURES ARE EXPECTED
ALONG THE COAST WHERE OVERCAST CONDITIONS KEPT TEMPERATURES COOLER
YESTERDAY... AND COOLER TEMPERATURES ARE EXPECTED IN SAN BENITO
COUNTY AFTER INTENSE SUBSIDENCE ALOFT YESTERDAY. TEMPERATURES WILL
TREND WARMER INTO TOMORROW WITH MID 70S TO AROUND 80 FORECAST FOR
MOST INLAND LOCATIONS.

TEMPERATURES ARE FORECAST TO COOL THROUGH MIDWEEK NEXT WEEK. COOL
IS A RELATIVE TERM HOWEVER AS TEMPERATURES WILL STILL BE A FEW TO
SEVERAL DEGREES ABOVE NORMAL. IN CASE YOU MISSED IT... 2015 HAS
BEEN THE WARMEST WINTER ON RECORD FOR CALIFORNIA ON RECORD (AS OF
THE END OF FEBRUARY... BUT MARCH IS ON PACE TO BE THE WARMEST
AS WELL). THE COOLING WILL COME AS A LOW PRESSURE SYSTEM PASSES
WELL TO THE NORTH OF OUR FORECAST AREA. NO PRECIPITATION IS
EXPECTED THROUGH THE END OF THE MONTH IN OUR AREA AT THIS TIME.

CURRENT FORECAST APPEARS ON TRACK... SO NO MAJOR UPDATES PLANNED
UNTIL THE AFTERNOON UPDATE.

&&

.AVIATION...AS OF 4:41 AM PDT SATURDAY...THE CURRENT IR SATELLITE
IMAGE IS SHOWING THE TAIL END OF A COLD FRONT PASSING JUST NORTH
OF THE SAN FRANCISCO BAY AREA. COOL DENSE AIR IS FILLING IN BEHIND
THE FRONT RESULTING IN MODERATE TO STRONG NORTHERLY WINDS OVER THE
COASTAL WATERS. THESE WINDS ARE MIXING OUT THE MARINE STRATUS THAT
IS TYPICALLY OBSERVED ALONG THE COAST. WINDS AT ABOUT 5000 FEET
ARE EXPECTED TO BE OFFSHORE TODAY WHICH WILL ALSO AID IN
PREVENTING STRATUS FROM FORMING IN THE SAN FRANCISCO BAY AREA. LOW
CLOUDS AND FOG ARE BEING OBSERVED IN THE MONTEREY AND SALINAS AREA
BUT ARE THIN AND SHOULD MIX OUT QUICKLY THIS MORNING.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR CONDITIONS ARE EXPECTED TO
PREVAIL THIS MORNING BUT ARE ANTICIPATED TO IMPROVE TO VFR AT KMRY
BY AROUND 1600Z AND 1800Z AT KSNS. WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT
POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 09:16 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 281141
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
441 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 2:36 AM PDT SATURDAY...SATELLITE IMAGERY
SHOWS ONLY A FEW PATCHES OF LOW CLOUDS AND FOG...MAINLY CONFINED
TO ALONG THE SAN FRANCISCO PENINSULA COAST...IN THE MONTEREY BAY
AND SOUTH OF THE MONTEREY BAY IN PORTIONS OF THE SALINAS VALLEY. A
STRONG NORTHERLY SURFACE PRESSURE GRADIENT (6.0 MB FROM ACV-SFO
NOW) HAS SERVED TO ERODE THE MARINE STRATUS LAYER FROM NORTH TO
SOUTH. ALL THAT IS LEFT IS THE PATCHY CONDITIONS MENTIONED. THE
ONSHORE SURFACE PRESSURE GRADIENT FROM SFO TO SAC IS 2.1
MB...WHICH HAS LESSENED SINCE LAST EVENING WHEN IT WAS UP TO 3.6
MB. THIS GRADIENT IS PROGGED TO CONTINUE WEAKENING TODAY TO AROUND
1 MB BY MIDDAY PER THE LATEST RUN OF THE NAM12. THE NORTHERLY FLOW
ALONG WITH MOSTLY SUNNY SKIES WILL PROVIDE WARMER TEMPERATURES
TODAY AND SUNDAY ACROSS THE DISTRICT. HIGHS ARE EXPECTED TO BE IN
THE 70S AND 80S MOST AREAS.

EARLY NEXT WEEK AN UPPER LEVEL TROUGH IS FORECAST TO BRUSH ACROSS
NORTHERN CALIFORNIA. THE RAIN FROM THIS SYSTEM WILL REMAIN WELL TO
THE NORTH OF OUR AREA...BUT COOLER TEMPERATURES ARE INDICATED BY
TUESDAY ALONG WITH SOME BREEZY CONDITIONS. THE COOL TEMPS ARE
EXPECTED 5TO PERSIST THROUGH THE REST OF THE WEEK WITH HIGHS IN
THE 60S AND 70S.

&&

.AVIATION...AS OF 4:41 AM PDT SATURDAY...THE CURRENT IR SATELLITE
IMAGE IS SHOWING THE TAIL END OF A COLD FRONT PASSING JUST NORTH
OF THE SAN FRANCISCO BAY AREA. COOL DENSE AIR IS FILLING IN BEHIND
THE FRONT RESULTING IN MODERATE TO STRONG NORTHERLY WINDS OVER THE
COASTAL WATERS. THESE WINDS ARE MIXING OUT THE MARINE STRATUS THAT
IS TYPICALLY OBSERVED ALONG THE COAST. WINDS AT ABOUT 5000 FEET
ARE EXPECTED TO BE OFFSHORE TODAY WHICH WILL ALSO AID IN
PREVENTING STRATUS FROM FORMING IN THE SAN FRANCISCO BAY AREA. LOW
CLOUDS AND FOG ARE BEING OBSERVED IN THE MONTEREY AND SALINAS AREA
BUT ARE THIN AND SHOULD MIX OUT QUICKLY THIS MORNING.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR CONDITIONS ARE EXPECTED TO
PREVAIL THIS MORNING BUT ARE ANTICIPATED TO IMPROVE TO VFR AT KMRY
BY AROUND 1600Z AND 1800Z AT KSNS. WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT
POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 04:22 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 281141
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
441 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 2:36 AM PDT SATURDAY...SATELLITE IMAGERY
SHOWS ONLY A FEW PATCHES OF LOW CLOUDS AND FOG...MAINLY CONFINED
TO ALONG THE SAN FRANCISCO PENINSULA COAST...IN THE MONTEREY BAY
AND SOUTH OF THE MONTEREY BAY IN PORTIONS OF THE SALINAS VALLEY. A
STRONG NORTHERLY SURFACE PRESSURE GRADIENT (6.0 MB FROM ACV-SFO
NOW) HAS SERVED TO ERODE THE MARINE STRATUS LAYER FROM NORTH TO
SOUTH. ALL THAT IS LEFT IS THE PATCHY CONDITIONS MENTIONED. THE
ONSHORE SURFACE PRESSURE GRADIENT FROM SFO TO SAC IS 2.1
MB...WHICH HAS LESSENED SINCE LAST EVENING WHEN IT WAS UP TO 3.6
MB. THIS GRADIENT IS PROGGED TO CONTINUE WEAKENING TODAY TO AROUND
1 MB BY MIDDAY PER THE LATEST RUN OF THE NAM12. THE NORTHERLY FLOW
ALONG WITH MOSTLY SUNNY SKIES WILL PROVIDE WARMER TEMPERATURES
TODAY AND SUNDAY ACROSS THE DISTRICT. HIGHS ARE EXPECTED TO BE IN
THE 70S AND 80S MOST AREAS.

EARLY NEXT WEEK AN UPPER LEVEL TROUGH IS FORECAST TO BRUSH ACROSS
NORTHERN CALIFORNIA. THE RAIN FROM THIS SYSTEM WILL REMAIN WELL TO
THE NORTH OF OUR AREA...BUT COOLER TEMPERATURES ARE INDICATED BY
TUESDAY ALONG WITH SOME BREEZY CONDITIONS. THE COOL TEMPS ARE
EXPECTED 5TO PERSIST THROUGH THE REST OF THE WEEK WITH HIGHS IN
THE 60S AND 70S.

&&

.AVIATION...AS OF 4:41 AM PDT SATURDAY...THE CURRENT IR SATELLITE
IMAGE IS SHOWING THE TAIL END OF A COLD FRONT PASSING JUST NORTH
OF THE SAN FRANCISCO BAY AREA. COOL DENSE AIR IS FILLING IN BEHIND
THE FRONT RESULTING IN MODERATE TO STRONG NORTHERLY WINDS OVER THE
COASTAL WATERS. THESE WINDS ARE MIXING OUT THE MARINE STRATUS THAT
IS TYPICALLY OBSERVED ALONG THE COAST. WINDS AT ABOUT 5000 FEET
ARE EXPECTED TO BE OFFSHORE TODAY WHICH WILL ALSO AID IN
PREVENTING STRATUS FROM FORMING IN THE SAN FRANCISCO BAY AREA. LOW
CLOUDS AND FOG ARE BEING OBSERVED IN THE MONTEREY AND SALINAS AREA
BUT ARE THIN AND SHOULD MIX OUT QUICKLY THIS MORNING.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR CONDITIONS ARE EXPECTED TO
PREVAIL THIS MORNING BUT ARE ANTICIPATED TO IMPROVE TO VFR AT KMRY
BY AROUND 1600Z AND 1800Z AT KSNS. WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT
POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 04:22 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 281141
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
441 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 2:36 AM PDT SATURDAY...SATELLITE IMAGERY
SHOWS ONLY A FEW PATCHES OF LOW CLOUDS AND FOG...MAINLY CONFINED
TO ALONG THE SAN FRANCISCO PENINSULA COAST...IN THE MONTEREY BAY
AND SOUTH OF THE MONTEREY BAY IN PORTIONS OF THE SALINAS VALLEY. A
STRONG NORTHERLY SURFACE PRESSURE GRADIENT (6.0 MB FROM ACV-SFO
NOW) HAS SERVED TO ERODE THE MARINE STRATUS LAYER FROM NORTH TO
SOUTH. ALL THAT IS LEFT IS THE PATCHY CONDITIONS MENTIONED. THE
ONSHORE SURFACE PRESSURE GRADIENT FROM SFO TO SAC IS 2.1
MB...WHICH HAS LESSENED SINCE LAST EVENING WHEN IT WAS UP TO 3.6
MB. THIS GRADIENT IS PROGGED TO CONTINUE WEAKENING TODAY TO AROUND
1 MB BY MIDDAY PER THE LATEST RUN OF THE NAM12. THE NORTHERLY FLOW
ALONG WITH MOSTLY SUNNY SKIES WILL PROVIDE WARMER TEMPERATURES
TODAY AND SUNDAY ACROSS THE DISTRICT. HIGHS ARE EXPECTED TO BE IN
THE 70S AND 80S MOST AREAS.

EARLY NEXT WEEK AN UPPER LEVEL TROUGH IS FORECAST TO BRUSH ACROSS
NORTHERN CALIFORNIA. THE RAIN FROM THIS SYSTEM WILL REMAIN WELL TO
THE NORTH OF OUR AREA...BUT COOLER TEMPERATURES ARE INDICATED BY
TUESDAY ALONG WITH SOME BREEZY CONDITIONS. THE COOL TEMPS ARE
EXPECTED 5TO PERSIST THROUGH THE REST OF THE WEEK WITH HIGHS IN
THE 60S AND 70S.

&&

.AVIATION...AS OF 4:41 AM PDT SATURDAY...THE CURRENT IR SATELLITE
IMAGE IS SHOWING THE TAIL END OF A COLD FRONT PASSING JUST NORTH
OF THE SAN FRANCISCO BAY AREA. COOL DENSE AIR IS FILLING IN BEHIND
THE FRONT RESULTING IN MODERATE TO STRONG NORTHERLY WINDS OVER THE
COASTAL WATERS. THESE WINDS ARE MIXING OUT THE MARINE STRATUS THAT
IS TYPICALLY OBSERVED ALONG THE COAST. WINDS AT ABOUT 5000 FEET
ARE EXPECTED TO BE OFFSHORE TODAY WHICH WILL ALSO AID IN
PREVENTING STRATUS FROM FORMING IN THE SAN FRANCISCO BAY AREA. LOW
CLOUDS AND FOG ARE BEING OBSERVED IN THE MONTEREY AND SALINAS AREA
BUT ARE THIN AND SHOULD MIX OUT QUICKLY THIS MORNING.

VICINITY OF KSFO...VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH
THE NEXT 24 TO 36 HOURS. GUSTY WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 20 KT THIS AFTERNOON WITH GUSTS TO 28 KT
POSSIBLE.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...LIFR CONDITIONS ARE EXPECTED TO
PREVAIL THIS MORNING BUT ARE ANTICIPATED TO IMPROVE TO VFR AT KMRY
BY AROUND 1600Z AND 1800Z AT KSNS. WESTERLY WINDS ARE EXPECTED TO
INCREASE TO AROUND 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT
POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 04:22 AM PDT SATURDAY...A STRONG NORTHERLY SURFACE
PRESSURE GRADIENT WILL MAINTAIN MODERATE NORTHWESTERLY WINDS
ACROSS A MAJORITY OF THE COASTAL WATERS THROUGH MID WEEK. THESE
GUSTY NORTHWESTERLY WINDS WILL GENERATE STEEP FRESH SWELL. A
MODERATE PERIOD WESTERLY SWELL WILL BEGIN TO BUILD INTO THE WATERS
SUNDAY NIGHT.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 280936
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
236 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 2:36 AM PDT SATURDAY...SATELLITE IMAGERY
SHOWS ONLY A FEW PATCHES OF LOW CLOUDS AND FOG...MAINLY CONFINED
TO ALONG THE SAN FRANCISCO PENINSULA COAST...IN THE MONTEREY BAY
AND SOUTH OF THE MONTEREY BAY IN PORTIONS OF THE SALINAS VALLEY. A
STRONG NORTHERLY SURFACE PRESSURE GRADIENT (6.0 MB FROM ACV-SFO
NOW) HAS SERVED TO ERODE THE MARINE STRATUS LAYER FROM NORTH TO
SOUTH. ALL THAT IS LEFT IS THE PATCHY CONDITIONS MENTIONED. THE
ONSHORE SURFACE PRESSURE GRADIENT FROM SFO TO SAC IS 2.1
MB...WHICH HAS LESSENED SINCE LAST EVENING WHEN IT WAS UP TO 3.6
MB. THIS GRADIENT IS PROGGED TO CONTINUE WEAKENING TODAY TO AROUND
1 MB BY MIDDAY PER THE LATEST RUN OF THE NAM12. THE NORTHERLY FLOW
ALONG WITH MOSTLY SUNNY SKIES WILL PROVIDE WARMER TEMPERATURES
TODAY AND SUNDAY ACROSS THE DISTRICT. HIGHS ARE EXPECTED TO BE IN
THE 70S AND 80S MOST AREAS.

EARLY NEXT WEEK AN UPPER LEVEL TROUGH IS FORECAST TO BRUSH ACROSS
NORTHERN CALIFORNIA. THE RAIN FROM THIS SYSTEM WILL REMAIN WELL TO
THE NORTH OF OUR AREA...BUT COOLER TEMPERATURES ARE INDICATED BY
TUESDAY ALONG WITH SOME BREEZY CONDITIONS. THE COOL TEMPS ARE
EXPECTED 5TO PERSIST THROUGH THE REST OF THE WEEK WITH HIGHS IN
THE 60S AND 70S.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST
TONIGHT AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 01:41 AM PDT SATURDAY...NORTHWEST WINDS WILL
STRENGTHEN OVERNIGHT AS A COOL FRONT SLIDE SLIDES SOUTHEAST ACROSS
THE AREA TONIGHT. THE NW WINDS WILL GENERATE STEEP FRESH SWELL
THROUGH THE WEEKEND. EXPECT MIXED SWELL THROUGH MOST OF THE
PERIOD.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR UNTIL 5 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: CANEPA
MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 280936
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
236 AM PDT SAT MAR 28 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY AND RESULT IN
MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 2:36 AM PDT SATURDAY...SATELLITE IMAGERY
SHOWS ONLY A FEW PATCHES OF LOW CLOUDS AND FOG...MAINLY CONFINED
TO ALONG THE SAN FRANCISCO PENINSULA COAST...IN THE MONTEREY BAY
AND SOUTH OF THE MONTEREY BAY IN PORTIONS OF THE SALINAS VALLEY. A
STRONG NORTHERLY SURFACE PRESSURE GRADIENT (6.0 MB FROM ACV-SFO
NOW) HAS SERVED TO ERODE THE MARINE STRATUS LAYER FROM NORTH TO
SOUTH. ALL THAT IS LEFT IS THE PATCHY CONDITIONS MENTIONED. THE
ONSHORE SURFACE PRESSURE GRADIENT FROM SFO TO SAC IS 2.1
MB...WHICH HAS LESSENED SINCE LAST EVENING WHEN IT WAS UP TO 3.6
MB. THIS GRADIENT IS PROGGED TO CONTINUE WEAKENING TODAY TO AROUND
1 MB BY MIDDAY PER THE LATEST RUN OF THE NAM12. THE NORTHERLY FLOW
ALONG WITH MOSTLY SUNNY SKIES WILL PROVIDE WARMER TEMPERATURES
TODAY AND SUNDAY ACROSS THE DISTRICT. HIGHS ARE EXPECTED TO BE IN
THE 70S AND 80S MOST AREAS.

EARLY NEXT WEEK AN UPPER LEVEL TROUGH IS FORECAST TO BRUSH ACROSS
NORTHERN CALIFORNIA. THE RAIN FROM THIS SYSTEM WILL REMAIN WELL TO
THE NORTH OF OUR AREA...BUT COOLER TEMPERATURES ARE INDICATED BY
TUESDAY ALONG WITH SOME BREEZY CONDITIONS. THE COOL TEMPS ARE
EXPECTED 5TO PERSIST THROUGH THE REST OF THE WEEK WITH HIGHS IN
THE 60S AND 70S.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST
TONIGHT AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 01:41 AM PDT SATURDAY...NORTHWEST WINDS WILL
STRENGTHEN OVERNIGHT AS A COOL FRONT SLIDE SLIDES SOUTHEAST ACROSS
THE AREA TONIGHT. THE NW WINDS WILL GENERATE STEEP FRESH SWELL
THROUGH THE WEEKEND. EXPECT MIXED SWELL THROUGH MOST OF THE
PERIOD.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR UNTIL 5 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: CANEPA
MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 280351
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
851 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 8:50 PM PDT FRIDAY...THE MARINE LAYER THAT
DEVELOPED ALONG OUR COAST LAST EVENING PERSISTED FOR MOST OF
TODAY. COASTAL LOW CLOUDS WERE SLOW TO CLEAR AND DID NOT CLEAR AT
ALL IN SOME AREAS. INCREASED CLOUD COVER...ALONG WITH ROBUST
ONSHORE FLOW...RESULTED IN CONSIDERABLE COOLING IN COASTAL AREAS
SINCE YESTERDAY. FOR EXAMPLE...DOWNTOWN SAN FRANCISCO`S HIGH OF 59
TODAY WAS 21 DEGREES COOLER THAN YESTERDAY`S HIGH OF 80. TODAY`S
COOLING WAS LESS PRONOUNCED INLAND. IN FACT...SOME OF THE INLAND
VALLEY LOCATIONS MOST ISOLATED FROM MARINE AIR INFLUENCE DIDN`T
COOL AT ALL (E.G., PINNACLES NATIONAL PARK WITH A HIGH OF 89
YESTERDAY AND 90 TODAY).

A WEAK AND DRY COLD FRONT IS DISSIPATING AS IT MOVES INTO
NORTHWEST CALIFORNIA THIS EVENING. COOLING ALOFT ASSOCIATED WITH
THIS WEAK FRONT HAS MANAGED TO DISRUPT THE MARINE LAYER TO SOME
EXTENT...RESULTING IN CLEARING ACROSS COASTAL NORTH BAY.
HOWEVER...THE FRONT PROBABLY ISN`T STRONG ENOUGH TO COMPLETELY MIX
OUT THE MARINE LAYER AND WE WILL LIKELY SEE AT LEAST PATCHY LOW
CLOUDS PERSIST THROUGH THE NIGHT AND INTO SATURDAY MORNING. GIVEN
A RATHER STRONG NORTH-SOUTH PRESSURE GRADIENT DOWN THE COAST...AND
THE FACT THIS GRADIENT IS FORECAST TO INCREASE FURTHER
OVERNIGHT...BELIEVE LOW CLOUD DEVELOPMENT WILL BE LIMITED ACROSS
INLAND AREAS.

SURFACE HIGH PRESSURE IS FORECAST TO BUILD INLAND ACROSS OREGON
OVER THE WEEKEND. THIS WILL MAINTAIN ENOUGH NORTHERLY COMPONENT
TO THE LOW LEVEL FLOW TO LIMIT THE AMOUNT OF LOW CLOUDS AND FOG
AND KEEP CLOUDS/FOG MOSTLY CONFINED TO THE IMMEDIATE COAST
THROUGH THE WEEKEND. TEMPERATURES OVER THE WEEKEND WILL WARM
NEAR THE COAST DUE TO DECREASED ONSHORE FLOW...AND COOL SLIGHTLY
FOR THE WARMEST INLAND AREAS DUE TO A SLIGHT COOLING OF THE
AIRMASS ALOFT. IN BETWEEN...EXPECT PERSISTENCE. ALL AREAS WILL SEE
ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND.

COOLING IS FORECAST DURING THE FIRST HALF OF THE UPCOMING WORK
WEEK AS AN UPPER TROUGH MOVES ACROSS THE PAC NW AND NORTHERN CA.
THE MODELS AGREE THAT RAINFALL WITH THIS SYSTEM WILL REMAIN TO OUR
NORTH...REACHING NO FARTHER SOUTH THAN MENDOCINO COUNTY LATE
MONDAY NIGHT. TEMPERATURES ARE FORECAST TO COOL DOWN TO NEAR
NORMAL BY TUESDAY.

THE MEDIUM RANGE MODELS ARE NOT OFFERING A WHOLE LOT OF HOPE FOR
SIGNIFICANT RAINFALL ANYTIME SOON. THE ECMWF SHOWS A COLD
TROUGH PRODUCING LIGHT TO MODERATE AMOUNTS OF RAIN OUT AT DAYS
9-10...BUT OTHERWISE IT`S LOOKING LIKE DRY CONDITIONS WILL PREVAIL
AS THE TYPICAL END OF OUR RAINY SEASON DRAWS NEARER.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 280351
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
851 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 8:50 PM PDT FRIDAY...THE MARINE LAYER THAT
DEVELOPED ALONG OUR COAST LAST EVENING PERSISTED FOR MOST OF
TODAY. COASTAL LOW CLOUDS WERE SLOW TO CLEAR AND DID NOT CLEAR AT
ALL IN SOME AREAS. INCREASED CLOUD COVER...ALONG WITH ROBUST
ONSHORE FLOW...RESULTED IN CONSIDERABLE COOLING IN COASTAL AREAS
SINCE YESTERDAY. FOR EXAMPLE...DOWNTOWN SAN FRANCISCO`S HIGH OF 59
TODAY WAS 21 DEGREES COOLER THAN YESTERDAY`S HIGH OF 80. TODAY`S
COOLING WAS LESS PRONOUNCED INLAND. IN FACT...SOME OF THE INLAND
VALLEY LOCATIONS MOST ISOLATED FROM MARINE AIR INFLUENCE DIDN`T
COOL AT ALL (E.G., PINNACLES NATIONAL PARK WITH A HIGH OF 89
YESTERDAY AND 90 TODAY).

A WEAK AND DRY COLD FRONT IS DISSIPATING AS IT MOVES INTO
NORTHWEST CALIFORNIA THIS EVENING. COOLING ALOFT ASSOCIATED WITH
THIS WEAK FRONT HAS MANAGED TO DISRUPT THE MARINE LAYER TO SOME
EXTENT...RESULTING IN CLEARING ACROSS COASTAL NORTH BAY.
HOWEVER...THE FRONT PROBABLY ISN`T STRONG ENOUGH TO COMPLETELY MIX
OUT THE MARINE LAYER AND WE WILL LIKELY SEE AT LEAST PATCHY LOW
CLOUDS PERSIST THROUGH THE NIGHT AND INTO SATURDAY MORNING. GIVEN
A RATHER STRONG NORTH-SOUTH PRESSURE GRADIENT DOWN THE COAST...AND
THE FACT THIS GRADIENT IS FORECAST TO INCREASE FURTHER
OVERNIGHT...BELIEVE LOW CLOUD DEVELOPMENT WILL BE LIMITED ACROSS
INLAND AREAS.

SURFACE HIGH PRESSURE IS FORECAST TO BUILD INLAND ACROSS OREGON
OVER THE WEEKEND. THIS WILL MAINTAIN ENOUGH NORTHERLY COMPONENT
TO THE LOW LEVEL FLOW TO LIMIT THE AMOUNT OF LOW CLOUDS AND FOG
AND KEEP CLOUDS/FOG MOSTLY CONFINED TO THE IMMEDIATE COAST
THROUGH THE WEEKEND. TEMPERATURES OVER THE WEEKEND WILL WARM
NEAR THE COAST DUE TO DECREASED ONSHORE FLOW...AND COOL SLIGHTLY
FOR THE WARMEST INLAND AREAS DUE TO A SLIGHT COOLING OF THE
AIRMASS ALOFT. IN BETWEEN...EXPECT PERSISTENCE. ALL AREAS WILL SEE
ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND.

COOLING IS FORECAST DURING THE FIRST HALF OF THE UPCOMING WORK
WEEK AS AN UPPER TROUGH MOVES ACROSS THE PAC NW AND NORTHERN CA.
THE MODELS AGREE THAT RAINFALL WITH THIS SYSTEM WILL REMAIN TO OUR
NORTH...REACHING NO FARTHER SOUTH THAN MENDOCINO COUNTY LATE
MONDAY NIGHT. TEMPERATURES ARE FORECAST TO COOL DOWN TO NEAR
NORMAL BY TUESDAY.

THE MEDIUM RANGE MODELS ARE NOT OFFERING A WHOLE LOT OF HOPE FOR
SIGNIFICANT RAINFALL ANYTIME SOON. THE ECMWF SHOWS A COLD
TROUGH PRODUCING LIGHT TO MODERATE AMOUNTS OF RAIN OUT AT DAYS
9-10...BUT OTHERWISE IT`S LOOKING LIKE DRY CONDITIONS WILL PREVAIL
AS THE TYPICAL END OF OUR RAINY SEASON DRAWS NEARER.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 280351
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
851 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 8:50 PM PDT FRIDAY...THE MARINE LAYER THAT
DEVELOPED ALONG OUR COAST LAST EVENING PERSISTED FOR MOST OF
TODAY. COASTAL LOW CLOUDS WERE SLOW TO CLEAR AND DID NOT CLEAR AT
ALL IN SOME AREAS. INCREASED CLOUD COVER...ALONG WITH ROBUST
ONSHORE FLOW...RESULTED IN CONSIDERABLE COOLING IN COASTAL AREAS
SINCE YESTERDAY. FOR EXAMPLE...DOWNTOWN SAN FRANCISCO`S HIGH OF 59
TODAY WAS 21 DEGREES COOLER THAN YESTERDAY`S HIGH OF 80. TODAY`S
COOLING WAS LESS PRONOUNCED INLAND. IN FACT...SOME OF THE INLAND
VALLEY LOCATIONS MOST ISOLATED FROM MARINE AIR INFLUENCE DIDN`T
COOL AT ALL (E.G., PINNACLES NATIONAL PARK WITH A HIGH OF 89
YESTERDAY AND 90 TODAY).

A WEAK AND DRY COLD FRONT IS DISSIPATING AS IT MOVES INTO
NORTHWEST CALIFORNIA THIS EVENING. COOLING ALOFT ASSOCIATED WITH
THIS WEAK FRONT HAS MANAGED TO DISRUPT THE MARINE LAYER TO SOME
EXTENT...RESULTING IN CLEARING ACROSS COASTAL NORTH BAY.
HOWEVER...THE FRONT PROBABLY ISN`T STRONG ENOUGH TO COMPLETELY MIX
OUT THE MARINE LAYER AND WE WILL LIKELY SEE AT LEAST PATCHY LOW
CLOUDS PERSIST THROUGH THE NIGHT AND INTO SATURDAY MORNING. GIVEN
A RATHER STRONG NORTH-SOUTH PRESSURE GRADIENT DOWN THE COAST...AND
THE FACT THIS GRADIENT IS FORECAST TO INCREASE FURTHER
OVERNIGHT...BELIEVE LOW CLOUD DEVELOPMENT WILL BE LIMITED ACROSS
INLAND AREAS.

SURFACE HIGH PRESSURE IS FORECAST TO BUILD INLAND ACROSS OREGON
OVER THE WEEKEND. THIS WILL MAINTAIN ENOUGH NORTHERLY COMPONENT
TO THE LOW LEVEL FLOW TO LIMIT THE AMOUNT OF LOW CLOUDS AND FOG
AND KEEP CLOUDS/FOG MOSTLY CONFINED TO THE IMMEDIATE COAST
THROUGH THE WEEKEND. TEMPERATURES OVER THE WEEKEND WILL WARM
NEAR THE COAST DUE TO DECREASED ONSHORE FLOW...AND COOL SLIGHTLY
FOR THE WARMEST INLAND AREAS DUE TO A SLIGHT COOLING OF THE
AIRMASS ALOFT. IN BETWEEN...EXPECT PERSISTENCE. ALL AREAS WILL SEE
ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND.

COOLING IS FORECAST DURING THE FIRST HALF OF THE UPCOMING WORK
WEEK AS AN UPPER TROUGH MOVES ACROSS THE PAC NW AND NORTHERN CA.
THE MODELS AGREE THAT RAINFALL WITH THIS SYSTEM WILL REMAIN TO OUR
NORTH...REACHING NO FARTHER SOUTH THAN MENDOCINO COUNTY LATE
MONDAY NIGHT. TEMPERATURES ARE FORECAST TO COOL DOWN TO NEAR
NORMAL BY TUESDAY.

THE MEDIUM RANGE MODELS ARE NOT OFFERING A WHOLE LOT OF HOPE FOR
SIGNIFICANT RAINFALL ANYTIME SOON. THE ECMWF SHOWS A COLD
TROUGH PRODUCING LIGHT TO MODERATE AMOUNTS OF RAIN OUT AT DAYS
9-10...BUT OTHERWISE IT`S LOOKING LIKE DRY CONDITIONS WILL PREVAIL
AS THE TYPICAL END OF OUR RAINY SEASON DRAWS NEARER.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 280351
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
851 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES OVER THE WEEKEND ALONG WITH WARMING NEAR THE
COAST. A COOLING TREND IS THEN FORECAST FOR MONDAY THROUGH
WEDNESDAY. DRY WEATHER IS EXPECTED TO PERSIST THROUGH THE FORECAST
PERIOD.

&&

.DISCUSSION...AS OF 8:50 PM PDT FRIDAY...THE MARINE LAYER THAT
DEVELOPED ALONG OUR COAST LAST EVENING PERSISTED FOR MOST OF
TODAY. COASTAL LOW CLOUDS WERE SLOW TO CLEAR AND DID NOT CLEAR AT
ALL IN SOME AREAS. INCREASED CLOUD COVER...ALONG WITH ROBUST
ONSHORE FLOW...RESULTED IN CONSIDERABLE COOLING IN COASTAL AREAS
SINCE YESTERDAY. FOR EXAMPLE...DOWNTOWN SAN FRANCISCO`S HIGH OF 59
TODAY WAS 21 DEGREES COOLER THAN YESTERDAY`S HIGH OF 80. TODAY`S
COOLING WAS LESS PRONOUNCED INLAND. IN FACT...SOME OF THE INLAND
VALLEY LOCATIONS MOST ISOLATED FROM MARINE AIR INFLUENCE DIDN`T
COOL AT ALL (E.G., PINNACLES NATIONAL PARK WITH A HIGH OF 89
YESTERDAY AND 90 TODAY).

A WEAK AND DRY COLD FRONT IS DISSIPATING AS IT MOVES INTO
NORTHWEST CALIFORNIA THIS EVENING. COOLING ALOFT ASSOCIATED WITH
THIS WEAK FRONT HAS MANAGED TO DISRUPT THE MARINE LAYER TO SOME
EXTENT...RESULTING IN CLEARING ACROSS COASTAL NORTH BAY.
HOWEVER...THE FRONT PROBABLY ISN`T STRONG ENOUGH TO COMPLETELY MIX
OUT THE MARINE LAYER AND WE WILL LIKELY SEE AT LEAST PATCHY LOW
CLOUDS PERSIST THROUGH THE NIGHT AND INTO SATURDAY MORNING. GIVEN
A RATHER STRONG NORTH-SOUTH PRESSURE GRADIENT DOWN THE COAST...AND
THE FACT THIS GRADIENT IS FORECAST TO INCREASE FURTHER
OVERNIGHT...BELIEVE LOW CLOUD DEVELOPMENT WILL BE LIMITED ACROSS
INLAND AREAS.

SURFACE HIGH PRESSURE IS FORECAST TO BUILD INLAND ACROSS OREGON
OVER THE WEEKEND. THIS WILL MAINTAIN ENOUGH NORTHERLY COMPONENT
TO THE LOW LEVEL FLOW TO LIMIT THE AMOUNT OF LOW CLOUDS AND FOG
AND KEEP CLOUDS/FOG MOSTLY CONFINED TO THE IMMEDIATE COAST
THROUGH THE WEEKEND. TEMPERATURES OVER THE WEEKEND WILL WARM
NEAR THE COAST DUE TO DECREASED ONSHORE FLOW...AND COOL SLIGHTLY
FOR THE WARMEST INLAND AREAS DUE TO A SLIGHT COOLING OF THE
AIRMASS ALOFT. IN BETWEEN...EXPECT PERSISTENCE. ALL AREAS WILL SEE
ABOVE NORMAL TEMPERATURES THROUGH THE WEEKEND.

COOLING IS FORECAST DURING THE FIRST HALF OF THE UPCOMING WORK
WEEK AS AN UPPER TROUGH MOVES ACROSS THE PAC NW AND NORTHERN CA.
THE MODELS AGREE THAT RAINFALL WITH THIS SYSTEM WILL REMAIN TO OUR
NORTH...REACHING NO FARTHER SOUTH THAN MENDOCINO COUNTY LATE
MONDAY NIGHT. TEMPERATURES ARE FORECAST TO COOL DOWN TO NEAR
NORMAL BY TUESDAY.

THE MEDIUM RANGE MODELS ARE NOT OFFERING A WHOLE LOT OF HOPE FOR
SIGNIFICANT RAINFALL ANYTIME SOON. THE ECMWF SHOWS A COLD
TROUGH PRODUCING LIGHT TO MODERATE AMOUNTS OF RAIN OUT AT DAYS
9-10...BUT OTHERWISE IT`S LOOKING LIKE DRY CONDITIONS WILL PREVAIL
AS THE TYPICAL END OF OUR RAINY SEASON DRAWS NEARER.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 280236
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
735 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 280236
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
735 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 280236
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
735 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN
RESPONSE TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT
PRESENTLY AT 4.3 MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT
AND SATURDAY PER THE NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED
WELL WITH RESPECT TO THE ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO
STRONG (BY AT LEAST 2X ACTUAL) WITH RESPECT TO THE LARGER SCALE
SFO-WMC GRADIENT. BACK TO THE NORTHERLY GRADIENTS AND
WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO COUNTY
ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY
/OFFSHORE/ COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE
SEEING NOW WILL VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK
OUT TO THE IMMEDIATE COAST AND SEA OVERNIGHT. FOR AVIATION THIS
IMPLIES WE MAY SEE MORE VFR THAN PRESENTLY FORECAST. ALSO...THERE`S
AN EASTERN PACIFIC COOL FRONT THAT WILL SLIDE S-SE OVER THE AREA
TONIGHT WITH A TENDENCY FOR THE CLOUD BAND TO SPLIT AS IT MOVES OVER
THE BAY AREA TONIGHT. IT`S A DIFFERENT STORY FOR THE MONTEREY BAY
AREA TERMINALS AS IT`LL TAKE SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA










000
FXUS66 KMTR 280235
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
735 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON VISIBLE SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN RESPONSE
TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT PRESENTLY AT 4.3
MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT AND SATURDAY PER THE
NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED WELL WITH RESPECT TO THE
ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO STRONG (BY AT LEAST 2X ACTUAL)
WITH RESPECT TO THE LARGER SCALE SFO-WMC GRADIENT. BACK TO THE NORTHERLY
GRADIENTS AND WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO
COUNTY ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY /OFFSHORE/
COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE SEEING NOW WILL
VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK OUT TO THE IMMEDIATE
COAST AND SEA OVERNIGHT. FOR AVIATION THIS IMPLIES WE MAY SEE MORE VFR
THAN PRESENTLY FORECAST. ALSO...THERE`S AN EASTERN PACIFIC COOL FRONT
THAT WILL SLIDE S-SE OVER THE AREA TONIGHT WITH A TENDENCY FOR THE
CLOUD BAND TO SPLIT AS IT MOVES OVER THE BAY AREA TONIGHT. IT`S A
DIFFERENT STORY FOR THE MONTEREY BAY AREA TERMINALS AS IT`LL TAKE
SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

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000
FXUS66 KMTR 280235
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
735 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.

&&

.AVIATION...AS OF 7:30 PM PDT FRIDAY...IT`S A COMPLICATED FORECAST TONIGHT
AND SATURDAY REGARDING STRATUS COVERAGE IN PARTICULAR.

AREAS OF COASTAL STRATUS CLOUDS CAN BE SEEN ON VISIBLE SATELLITE IMAGERY
FROM POINT REYES TO POINT CONCEPTION. NW WINDS ARE INCREASING IN RESPONSE
TO A STEADILY INCREASING ACV-SFO PRESSURE GRADIENT PRESENTLY AT 4.3
MB...BUT PROJECTED TO REACH AT LEAST 6 MB TONIGHT AND SATURDAY PER THE
NAM MODEL. THE 18Z NAM MODEL RUN INITIALIZED WELL WITH RESPECT TO THE
ACV-SFO AND SFO-SAC GRADIENTS BUT WAS TOO STRONG (BY AT LEAST 2X ACTUAL)
WITH RESPECT TO THE LARGER SCALE SFO-WMC GRADIENT. BACK TO THE NORTHERLY
GRADIENTS AND WINDS...NORTHERLY GRADIENTS FROM THE NORTH BAY TO MENDOCINO
COUNTY ARE BECOMING STRONGER AND EXPECTED TO HOLD BETWEEN MODERATE AND
STRONG INTO SATURDAY. IT`S A POSSIBILITY THAT THE ACV-SFO GRADIENT IS
UNDERFORECASTED BY THE 18Z NAM MODEL RUN. THIS IMPLIES THAT AS THE NW
WINDS INCREASE TONIGHT WITH A TENDENCY TOWARD A STRONGER NORTHERLY /OFFSHORE/
COMPONENT THE BRIEF INLAND STRATUS INTRUSIONS WE ARE SEEING NOW WILL
VERY LIKELY REVERSE LATER THIS EVENING AND MOVE BACK OUT TO THE IMMEDIATE
COAST AND SEA OVERNIGHT. FOR AVIATION THIS IMPLIES WE MAY SEE MORE VFR
THAN PRESENTLY FORECAST. ALSO...THERE`S AN EASTERN PACIFIC COOL FRONT
THAT WILL SLIDE S-SE OVER THE AREA TONIGHT WITH A TENDENCY FOR THE
CLOUD BAND TO SPLIT AS IT MOVES OVER THE BAY AREA TONIGHT. IT`S A
DIFFERENT STORY FOR THE MONTEREY BAY AREA TERMINALS AS IT`LL TAKE
SOME TIME FOR THE STRATUS TO CLEAR.

WILL LOOK OVER THE 00Z TAFS AND COORD WITH CWSU OAKLAND BEFORE MAKING
ANY CHANGES...BUT SOME AMENDMENTS MAY BE FORTHCOMING.

VICINITY OF KSFO...RECENT OBS INDICATE MVFR BKN CIG AT KSFO WITH GUSTY
WESTERLY WINDS CAUSING A STRATUS INTRUSION. STRATUS STILL BANKING
ALONG THE COAST BACK UPSTREAM TO POINT REYES BUT WE`RE ALSO WATCHING
AN INCOMING COOL FRONT WITH INCREASING NORTHERLY WINDS AS DESCRIBED
IN MORE DETAIL ABOVE.

SFO BRIDGE APPROACH...STRATUS CLOUDS MAY BRIEFLY SPILL INTO THE APPROACH
OVERNIGHT...BUT LOW CONFIDENCE FORECAST REGARDING COVERAGE.

MONTEREY BAY AREA TERMINALS...STRATUS CLOUDS WILL CONTINUE TO MOVE
IN ON NW WINDS ACROSS THE MONTEREY BAY WATERS. IFR FORECASTED TONIGHT.
CLEARING EXPECTED BY MID TO LATE SATURDAY MORNING...LOW CONFIDENCE
FORECAST ON THE CLEARING TIMES. ROBUST NW WINDS CAN SOMETIMES KEEP
THE LOW CLOUDS HANGING IN ON THE PENINSULA LONGER THAN EXPECTED DUE
TO TERRAIN FORCING FOR INSTANCE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION: CANEPA
MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 272142
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
242 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.



&&

.AVIATION...AS OF 11:10 AM PDT FRIDAY... A SHALLOW STRATUS DECK
PUSHED ONSHORE OVERNIGHT WHICH LED TO POCKETS OF LIFR VISBYS AND
CIGS ALONG THE COAST AND THROUGH INLAND VALLEYS THROUGH THIS
MORNING. THAT INITIAL OVERNIGHT PUSH INLAND HAS NOW RETREATED THIS
MORNING.

ONSHORE FLOW IS EXPECTED TO STRENGTHEN AND BECOME BREEZY/GUSTY
THROUGH THE DAY AS A WEAK SYSTEM PASSES TO A NORTH AND PRESSURE
GRADIENTS TIGHTEN. PEAK WIND GUSTS 20-30KT POSSIBLE. GOES-W CLOUD
THICKNESS IMAGERY SHOWS THE STRATUS DECK ALONG CALI SHORELINE
THICKENING FROM 300-500FT TO OVER 2000FT IN THE VICINITY OF PT
REYES AND THE BAY AREA. LATEST VISIBLE SATELLITE IMAGERY SHOWS
THIS DEEPENING LAYER MAY MAKE ANOTHER PUSH ONSHORE WITH STRONGER
ONSHORE FLOW ALOFT... AT THE SAME TIME THAT THE SHALLOWER LEVEL
LAYER IS RETREATING. THUS... CAN NOT RULE OUT MVFR CIGS RETURNING
INTO THE BAY AREA PRIOR TO 00Z.

LATEST WRF SUGGESTS AN EARLY RETURN OF STRATUS...AROUND 00Z...IN A
SUMMER LIKE SCENARIO. CONFIDENCE ON THIS TIMING IS LOW TO
MODERATE. HOWEVER EXPECT STRATUS TO RETURN NO LATER THAN 04Z FOR A
MAJORITY OF TAF LOCATIONS (EXCLUDING KLVK AND POSSIBLY KSJC).

VICINITY OF KSFO... BREEZY ONSHORE FLOW TODAY WITH PEAK GUSTS
25-30 KT. VFR CIGS THROUGH 00Z... THEN DETERIORATING CIGS. SLIGHT
CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS... ONSHORE FLOW WITH VFR CONDS INTO
THE AFTERNOON... THEN DETERIORATING CIGS BEGINNING AROUND 00Z.
SLIGHT CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 272142
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
242 PM PDT FRI MAR 27 2015

.SYNOPSIS...ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT
IN MOSTLY CLEAR SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER
TEMPERATURES ARE THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO
PERSIST THROUGH THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 02:42 PM PDT FRIDAY...DRY WEATHER WILL
CONTINUE THROUGH THE NEXT SEVEN DAYS WITH SLIGHTLY ABOVE NORMAL TEMPERATURES.

INTERESTING VISIBLE SATELLITE PICTURE THIS AFTERNOON SHOWING THAT
THE MORNING LOW CLOUDS/FOG HAS HUNG ALONG THE MAJORITY OF THE
COASTLINE THIS AFTERNOON. AS ONE WOULD SUSPECT THE LINGERING
CLOUDS HAS ADVERSELY IMPACTED AFTERNOON TEMPERATURES. LOCATIONS
ALONG THE IMMEDIATE COASTLINE STILL STUCK IN THE CLOUDS ARE
STRUGGLING TO EVEN REACH THE 60S. AWAY FROM THE COAST
HOWEVER...TEMPERATURES DID WARM NICELY INTO THE 70S AND 80S.

SHORT TERM(TONIGHT-MONDAY)...
ONCE THE SUN SETS EXPECT THE COASTAL STRATUS TO COME BACK IN
LOCALLY. THE UPSTREAM COLD FRONT SEEN ON VIS SATELLITE WILL
CONTINUE TO APPROACH THE BAY AREA AND GRADUALLY DISSIPATE BY EARLY
SATURDAY. THROUGH MONDAY...MORNINGS MAY START OF WITH SOME PATCHY
CLOUDS/FOG BUT THE AFTERNOONS SHOULD BE PLEASANT WITH TEMPS ABOVE
NORMAL. INTERIOR LOCATIONS WILL BE A LITTLE COOLER THAN TODAY AS
THE PASSING WEAK FRONT BRINGS IN COOLER AIR...ESPECIALLY SATURDAY. TEMPS
WILL BE IN THE 60S AND 70S AT THE COAST AND 70S AND 80S INLAND. NO
PRECIP EXPECTED AS A WEAK RIDGE RE-BUILDS ON MONDAY.

LONG TERM(TUESDAY-FRIDAY)...
BROAD UPPER LEVEL TROUGH WILL MOVE INTO NORCAL EARLY NEXT ALLOWING
FOR A DROP IN AFTERNOON TEMPERATURES TUESDAY AND WEDNESDAY. SOME OF THE
MODEL GUIDANCE TRIES TO BRING SOME LIGHT PRECIP INTO THE FAR
NORTH BAY ON TUESDAY...BUT THINK THERE IS A BETTER CHANCE FARTHER
NORTH...ESP NEAR THE CA/OR BORDER. FOR NOW...STILL NO MENTION OF
PRECIP IN THE FORECAST. UPPER LEVEL RIDING RETURNS FOR THURSDAY
AND FRIDAY WITH A SLIGHT WARMING TREND.



&&

.AVIATION...AS OF 11:10 AM PDT FRIDAY... A SHALLOW STRATUS DECK
PUSHED ONSHORE OVERNIGHT WHICH LED TO POCKETS OF LIFR VISBYS AND
CIGS ALONG THE COAST AND THROUGH INLAND VALLEYS THROUGH THIS
MORNING. THAT INITIAL OVERNIGHT PUSH INLAND HAS NOW RETREATED THIS
MORNING.

ONSHORE FLOW IS EXPECTED TO STRENGTHEN AND BECOME BREEZY/GUSTY
THROUGH THE DAY AS A WEAK SYSTEM PASSES TO A NORTH AND PRESSURE
GRADIENTS TIGHTEN. PEAK WIND GUSTS 20-30KT POSSIBLE. GOES-W CLOUD
THICKNESS IMAGERY SHOWS THE STRATUS DECK ALONG CALI SHORELINE
THICKENING FROM 300-500FT TO OVER 2000FT IN THE VICINITY OF PT
REYES AND THE BAY AREA. LATEST VISIBLE SATELLITE IMAGERY SHOWS
THIS DEEPENING LAYER MAY MAKE ANOTHER PUSH ONSHORE WITH STRONGER
ONSHORE FLOW ALOFT... AT THE SAME TIME THAT THE SHALLOWER LEVEL
LAYER IS RETREATING. THUS... CAN NOT RULE OUT MVFR CIGS RETURNING
INTO THE BAY AREA PRIOR TO 00Z.

LATEST WRF SUGGESTS AN EARLY RETURN OF STRATUS...AROUND 00Z...IN A
SUMMER LIKE SCENARIO. CONFIDENCE ON THIS TIMING IS LOW TO
MODERATE. HOWEVER EXPECT STRATUS TO RETURN NO LATER THAN 04Z FOR A
MAJORITY OF TAF LOCATIONS (EXCLUDING KLVK AND POSSIBLY KSJC).

VICINITY OF KSFO... BREEZY ONSHORE FLOW TODAY WITH PEAK GUSTS
25-30 KT. VFR CIGS THROUGH 00Z... THEN DETERIORATING CIGS. SLIGHT
CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS... ONSHORE FLOW WITH VFR CONDS INTO
THE AFTERNOON... THEN DETERIORATING CIGS BEGINNING AROUND 00Z.
SLIGHT CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

&&

.MARINE...AS OF 02:13 PM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO FURTHER STRENGTHEN OVERNIGHT AND PERSIST INTO THE SMALL CRAFT
ADVISORY RANGE THROUGH THE WEEKEND AND POSSIBLY INTO EARLY NEXT
WEEK. STRONG WINDS WILL GENERATE STEEP FRESH SWELL THROUGH THE
WEEKEND. MIXED SWELL THROUGH THE PERIOD WITH A DOMINANT WEST
SWELL.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM
             SCA...PT REYES TO PIGEON PT 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PIGEON PT TO PT PINOS 10-60 NM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...PT ARENA TO PT REYES 0-10 NM
             SCA...PT REYES TO PIGEON PT 0-10 NM
             SCA...ROUGH BAR ADVISORY FOR SF BAR
             SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 8 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE UNTIL 8 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 271809
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1109 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 11:10 AM PDT FRIDAY... A SHALLOW STRATUS DECK
PUSHED ONSHORE OVERNIGHT WHICH LED TO POCKETS OF LIFR VISBYS AND
CIGS ALONG THE COAST AND THROUGH INLAND VALLEYS THROUGH THIS
MORNING. THAT INITIAL OVERNIGHT PUSH INLAND HAS NOW RETREATED THIS
MORNING.

ONSHORE FLOW IS EXPECTED TO STRENGTHEN AND BECOME BREEZY/GUSTY
THROUGH THE DAY AS A WEAK SYSTEM PASSES TO A NORTH AND PRESSURE
GRADIENTS TIGHTEN. PEAK WIND GUSTS 20-30KT POSBL. GOES-W CLOUD
THICKNESS IMAGERY SHOWS THE STRATUS DECK ALONG CALI SHORELINE
THICKENING FROM 300-500FT TO OVER 2000FT IN THE VICINITY OF PT
REYES AND THE BAY AREA. LATEST VISIBLE SATELLITE IMAGERY SHOWS
THIS DEEPENING LAYER MAY MAKE ANOTHER PUSH ONSHORE WITH STRONGER
ONSHORE FLOW ALOFT... AT THE SAME TIME THAT THE SHALLOWER LEVEL
LAYER IS RETREATING. THUS... CAN NOT RULE OUT MVFR CIGS RETURNING
INTO THE BAY AREA PRIOR TO 00Z.

LATEST WRF SUGGESTS AN EARLY RETURN OF STRATUS...AROUND 00Z...IN A
SUMMER LIKE SCENARIO. CONFIDENCE ON THIS TIMING IS LOW TO
MODERATE. HOWEVER EXPECT STRATUS TO RETURN NO LATER THAN 04Z FOR A
MAJORITY OF TAF LOCATIONS (EXCLUDING KLVK AND POSBLY KSJC).

VICINITY OF KSFO... BREEZY ONSHORE FLOW TODAY WITH PEAK GUSTS
25-30 KT. VFR CIGS THROUGH 00Z... THEN DETERIORATING CIGS. SLIGHT
CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS... ONSHORE FLOW WITH VFR CONDS INTO
THE AFTERNOON... THEN DETERIORATING CIGS BEGINNING AROUND 00Z.
SLIGHT CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

&&

.MARINE...AS OF 10:42 AM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO INCREASE SIGNIFICANTLY OVER THE COASTAL WATERS TODAY AS A DRY
SYSTEM PASSES TO THE NORTH. STRONG NORTH WINDS ARE EXPECTED TO
GENERATE STEEP FRESH SWELL THROUGH THE WEEKEND AND POSSIBLY INTO
EARLY NEXT WEEK. MIXED SWELL THROUGH THE PERIOD.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 271809
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1109 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 11:10 AM PDT FRIDAY... A SHALLOW STRATUS DECK
PUSHED ONSHORE OVERNIGHT WHICH LED TO POCKETS OF LIFR VISBYS AND
CIGS ALONG THE COAST AND THROUGH INLAND VALLEYS THROUGH THIS
MORNING. THAT INITIAL OVERNIGHT PUSH INLAND HAS NOW RETREATED THIS
MORNING.

ONSHORE FLOW IS EXPECTED TO STRENGTHEN AND BECOME BREEZY/GUSTY
THROUGH THE DAY AS A WEAK SYSTEM PASSES TO A NORTH AND PRESSURE
GRADIENTS TIGHTEN. PEAK WIND GUSTS 20-30KT POSBL. GOES-W CLOUD
THICKNESS IMAGERY SHOWS THE STRATUS DECK ALONG CALI SHORELINE
THICKENING FROM 300-500FT TO OVER 2000FT IN THE VICINITY OF PT
REYES AND THE BAY AREA. LATEST VISIBLE SATELLITE IMAGERY SHOWS
THIS DEEPENING LAYER MAY MAKE ANOTHER PUSH ONSHORE WITH STRONGER
ONSHORE FLOW ALOFT... AT THE SAME TIME THAT THE SHALLOWER LEVEL
LAYER IS RETREATING. THUS... CAN NOT RULE OUT MVFR CIGS RETURNING
INTO THE BAY AREA PRIOR TO 00Z.

LATEST WRF SUGGESTS AN EARLY RETURN OF STRATUS...AROUND 00Z...IN A
SUMMER LIKE SCENARIO. CONFIDENCE ON THIS TIMING IS LOW TO
MODERATE. HOWEVER EXPECT STRATUS TO RETURN NO LATER THAN 04Z FOR A
MAJORITY OF TAF LOCATIONS (EXCLUDING KLVK AND POSBLY KSJC).

VICINITY OF KSFO... BREEZY ONSHORE FLOW TODAY WITH PEAK GUSTS
25-30 KT. VFR CIGS THROUGH 00Z... THEN DETERIORATING CIGS. SLIGHT
CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS... ONSHORE FLOW WITH VFR CONDS INTO
THE AFTERNOON... THEN DETERIORATING CIGS BEGINNING AROUND 00Z.
SLIGHT CHANCE OF EARLY STRATUS RETURN PRIOR TO 00Z.

CONFIDENCE IS LOW TO MODERATE.

&&

.MARINE...AS OF 10:42 AM PDT FRIDAY...NORTHWEST WINDS ARE FORECAST
TO INCREASE SIGNIFICANTLY OVER THE COASTAL WATERS TODAY AS A DRY
SYSTEM PASSES TO THE NORTH. STRONG NORTH WINDS ARE EXPECTED TO
GENERATE STEEP FRESH SWELL THROUGH THE WEEKEND AND POSSIBLY INTO
EARLY NEXT WEEK. MIXED SWELL THROUGH THE PERIOD.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: DRP

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 271602
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
902 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 271602
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
902 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 271602
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
902 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 271602
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
902 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 08:59 AM PDT FRIDAY...SHORT TERM CONCERNS THIS
MORNING WILL BE FOG. INCREASED ONSHORE FLOW AND LOW LEVEL MOISTURE
HAS LED TO A SHALLOW MARINE LAYER. PROFILERS AND SODARS INDICATE
A MARINE LAYER DEPTH OF A FEW HUNDRED FEET. THE SHALLOW NATURE HAS
ALSO PRODUCED SOME PATCHY DENSE FOG...ESPECIALLY ALONG THE
IMMEDIATE COASTLINE AND LOCALLY INLAND TO BOTH BAYS. A HANDFUL OF
SITES ARE CURRENTLY REPORTING VISIBILITIES LESS THAN ONE QUARTER
OF A MILE.

BURN OFF OF THE CLOUDS/FOG THIS MORNING WILL BE GRADUAL DESPITE
THE SHALLOW NATURE THANKS TO INCREASED ONSHORE FLOW (SFO-SAC
GRADIENT IS UP).

THAT BEING SAID...SOME PATCHY LOW CLOUDS MAY LINGER ALONG THE
COAST THROUGH THE DAY...BUT MUCH OF THE BAY AREA WILL BE MOSTLY
SUNNY TODAY. DESPITE AMPLE SUNSHINE THE COOLER AIR AND INCREASED
ONSHORE FLOW WILL LEAD TO A NOTICEABLE COOL DOWN TODAY. THE 24
HOUR TEMP CHANGE WILL BE AS MUCH AS 12 DEGREES COLDER THAN
YESTERDAY. HOWEVER...DESPITE THE COOL DOWN IT SHOULD STILL BE A
PLEASANT DAY WITH HIGHS IN THE 70S AND 80S INLAND AND 60S ALONG
THE COAST.

FORECAST IS ON TRACK AND NO UPDATE IS NEEDED.

&&

.PREV DISCUSSION...AS OF 3:03 AM PDT FRIDAY...SATURDAY SHOULD
SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST AREAS...AND UP TO
THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF HIGH PRESSURE WILL
THEN BUILD OVER THE WEST COAST ON SUNDAY FOR SLIGHT WARMING. BY
EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED TO BRUSH ACROSS
THE WEST COAST INCLUDING NORTHERN CALIFORNIA. THIS WILL BRING
COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL FLOW
ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER OF
THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: MM
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 271151
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
451 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 271151
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
451 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 271151
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
451 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 271151
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
451 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 4:51 AM PDT FRIDAY...THE CURRENT SATELLITE IR
FOG PRODUCT IS SHOWING MOSTLY CLEAR SKIES AROUND THE FORECAST AREA
THIS MORNING WITH THE EXCEPTION OF LOW CLOUDS AND FOG ALONG THE
IMMEDIATE COAST...IMPACTING KSNS AND KMRY. A LARGE FIELD OF
STRATUS ALSO IS PRESENT OVER OCEAN ALONG THE CALIFORNIA COAST AT
THIS HOUR.

A LOW PRESSURE SYSTEM IS PUSHING TOWARDS THE PACIFIC NORTHWEST
WHICH WILL DRAG A COLD FRONT INTO NORTHERN CALIFORNIA THIS
MORNING. THIS COLD FRONT MAY PUSH STRATUS INTO THE TERMINALS BY
LATE AFTERNOON EARLY EVENING. IN ADDITION TO THIS FRONT THE LOCAL
PRESSURE GRADIENT IS EXPECTED TO INCREASE...PROMOTING MODERATE
GUSTY WINDS LATER THIS MORNING INTO THE AFTERNOON AND EVENING
HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PREVAIL TODAY WITH STRATUS
POSSIBLE THIS EVENING. GUSTY WEST WINDS WILL REACH 15 TO 20 KT
THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...GROUND FOG WILL REDUCE VIS TO AROUND
1/4SM THIS MORNING BUT IS EXPECTED TO BURN OFF BY AROUND 1600Z.
HOWEVER...ONCE THE FOG BURNS OFF SCT007-012 WILL LINGER AROUND
THROUGH THIS AFTERNOON. AND EARLY RETURN OF BKN008 IS LIKELY BY
0200Z. WINDS ARE EXPECTED TO INCREASE OUT OF THE WEST TODAY
REACHING 10 TO 15 KT THIS AFTERNOON WITH GUSTS TO 20 KT POSSIBLE.

CONFIDENCE IS MODERATE.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

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000
FXUS66 KMTR 271003
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
303 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 9:45 PM PDT THURSDAY...FOG HAS DEVELOPED ALONG
THE COAST THIS EVENING AND WILL IMPACT MRY AND SNS. WARM AND DRY
AIRMASS OVER THE INTERIOR WILL KEEP FOG AND LOW CIGS OUT OF THE
SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH FRIDAY.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR FOR CIGS AND VSBYS THROUGH 12Z.
DRAINAGE WIND FROM THE SNS VALLEY EXPECTED TO PUSH FOG OUT AFTER
12Z.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 271003
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
303 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 9:45 PM PDT THURSDAY...FOG HAS DEVELOPED ALONG
THE COAST THIS EVENING AND WILL IMPACT MRY AND SNS. WARM AND DRY
AIRMASS OVER THE INTERIOR WILL KEEP FOG AND LOW CIGS OUT OF THE
SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH FRIDAY.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR FOR CIGS AND VSBYS THROUGH 12Z.
DRAINAGE WIND FROM THE SNS VALLEY EXPECTED TO PUSH FOG OUT AFTER
12Z.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 271003
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
303 AM PDT FRI MAR 27 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES TODAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN ON SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMING TEMPERATURES FOR SUNDAY. COOLER TEMPERATURES ARE
THEN EXPECTED BEGINNING ON MONDAY. DRY WEATHER TO PERSIST THROUGH
THE FORECAST PERIOD.

&&

.DISCUSSION...AS OF 3:03 AM PDT FRIDAY...A VERY SHALLOW MARINE
LAYER RIGHT ALONG THE COAST HAS RESULTED IN SOME PATCHY DENSE FOG
NEAR THE COAST...AROUND THE MONTEREY BAY AND INTO THE NORTHERN SALINAS
VALLEY. CURRENTLY THE VISIBILITIES AT KMRY...KSNS AND KWVI ARE
WAVERING BETWEEN 1/2 AND 1/4 MILE...AS WELL AS HALF MOON BAY. A
VERY SHALLOW FOG LAYER IS ALSO SHOWING UP BEHIND THE BUILDINGS IN
SAN FRANCISCO ON WEBCAMS. GIVEN THE EXTREME SHALLOW NATURE OF THIS
FOG...IT IS NOT EXPECTED TO PERSIST TOO LONG THIS
MORNING...ALTHOUGH THE ONSHORE WIND FLOW WILL INCREASE AS THE
ONSHORE SURFACE PRESSURE GRADIENT TIGHTENS THROUGHOUT THE DAY. THE
00Z NAM12 INDICATES THAT THE SFO-SAC SURFACE PRESSURE GRADIENT
WILL INCREASE TO 3.5 MB BY 00Z SATURDAY WHICH WOULD RESULT IN A
STRONG ENOUGH SEA BREEZE TO BRING COOLER AIR INLAND. AS A
RESULT...TODAY`S HIGH TEMPERATURES ARE FORECAST TO BE FROM 5-15
DEGREES COOLER THAN THOSE ON THURSDAY.

SATURDAY SHOULD SEE SIMILAR TEMPERATURES WITH 60S AND 70S MOST
AREAS...AND UP TO THE MID 80S FAR INLAND AREAS. A WEAK RIDGE OF
HIGH PRESSURE WILL THEN BUILD OVER THE WEST COAST ON SUNDAY FOR
SLIGHT WARMING. BY EARLY NEXT WEEK...HOWEVER...A TROUGH IS PROGGED
TO BRUSH ACROSS THE WEST COAST INCLUDING NORTHERN CALIFORNIA.
THIS WILL BRING COOLER TEMPERATURES TO THE DISTRICT BY TUESDAY AND
WEDNESDAY...WITH HIGHS EXPECTED TO BE IN THE 60S AND 70S. RAIN
CHANCES WITH THIS TROUGH WILL REMAIN WELL TO THE NORTH. ZONAL
FLOW ALOFT TO MAINTAIN ACROSS THE WEST COAST THROUGH THE REMAINDER
OF THE FORECAST PERIOD.

&&

.AVIATION...AS OF 9:45 PM PDT THURSDAY...FOG HAS DEVELOPED ALONG
THE COAST THIS EVENING AND WILL IMPACT MRY AND SNS. WARM AND DRY
AIRMASS OVER THE INTERIOR WILL KEEP FOG AND LOW CIGS OUT OF THE
SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH FRIDAY.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR FOR CIGS AND VSBYS THROUGH 12Z.
DRAINAGE WIND FROM THE SNS VALLEY EXPECTED TO PUSH FOG OUT AFTER
12Z.

&&

.MARINE...AS OF 2:45 AM PDT FRIDAY...THE SURFACE PRESSURE
GRADIENT WILL INCREASE TODAY AS A STORM SYSTEM PASSES TO THE
NORTH. THIS WILL RESULT IN INCREASING NORTH WESTERLY WINDS ACROSS
THE COASTAL WATERS. THE STRENGTHENING WINDS WILL GENERATE STEEP
FRESH SWELL WHICH WILL PERSIST THROUGH THE WEEKEND AND POSSIBLY
INTO THE FIRST HALF OF NEXT WEEK.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...SCA...PT ARENA TO PT REYES 10-60 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 10-60 NM FROM 2 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM FROM 5 PM
             SCA...PIGEON PT TO PT PINOS 10-60 NM FROM 5 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM FROM 5 PM
             SCA...PT ARENA TO PT REYES 0-10 NM FROM 2 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM FROM 5 PM
             SCA...SF BAY NORTH OF THE BAY BRIDGE FROM 2 PM
             SCA...SF BAY SOUTH OF THE BAY BRIDGE FROM 2 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 270444
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
944 PM PDT THU MAR 26 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES ON FRIDAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN BY SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMER THAN NORMAL TEMPERATURES OVER THE WEEKEND.
COOLING IS THEN EXPECTED DURING THE FIRST HALF OF NEXT WEEK. DRY
WEATHER WILL CONTINUE WITH NO RAIN IN SIGHT THROUGH THE END OF THE
MONTH

&&

.DISCUSSION...AS OF 8:55 PM PDT THURSDAY...SUBSIDENCE WARMING
OCCURRED UNDER A WEST COAST RIDGE TODAY. THE 00Z OAK SOUNDING
SHOWS THAT THE AIRMASS BELOW 900 MB WARMED BY AS MUCH AS 6 DEGREES
C SINCE YESTERDAY. IN ADDITION...LIGHT OFFSHORE FLOW DEVELOPED
LAST NIGHT AND PERSISTED THROUGH EARLY AFTERNOON HOURS OF TODAY.
TODAY`S SEABREEZE WAS WEAK AND DEVELOPED LATE. THESE DEVELOPMENTS
RESULTED IN SEVERAL DAILY HIGH TEMPERATURE RECORDS ACROSS OUR
REGION TODAY...INCLUDING SAN JOSE WITH A HIGH OF 85 AND SALINAS
AIRPORT AT 90. THE SALINAS AIRPORT CAME WITHIN TWO DEGREES OF
MATCHING ITS RECORD HIGH FOR THE ENTIRE MONTH OF MARCH...WHICH WAS
SET JUST A DOZEN DAYS AGO ON MARCH 14.

LOW CLOUDS AND FOG BEGAN TO DEVELOP OVER THE COASTAL WATERS THIS
AFTERNOON AND LOW CLOUDS/FOG QUICKLY FILLED IN ALONG MOST OF OUR
COAST BY EARLY EVENING. A FORECAST UPDATE WAS COMPLETED EARLIER
THIS EVENING TO INCREASE CLOUD COVER AND ADD FOG TO COASTAL AREAS
OVERNIGHT AND INTO FRIDAY MORNING.

ONSHORE FLOW REMAINS WEAK AT THIS TIME AND INDICATIONS ARE THAT
THE MARINE LAYER IS QUITE SHALLOW. THUS...EXPECT MOST OF THE LOW
CLOUDS AND FOG TO REMAIN CONFINED TO AREAS NEAR THE OCEAN
THROUGH EARLY FRIDAY. PATCHY DENSE FOG IS LIKELY OVERNIGHT THROUGH
MID MORNING FRIDAY.

BOTH THE NAM AND WRF MODEL OUTPUT INDICATE INCREASING ONSHORE FLOW
DURING THE DAY ON FRIDAY AS A SHORTWAVE TROUGH APPROACHES THE PAC
NW AND FAR NORTHERN CA. THIS WILL MEAN PERSISTENT LOW CLOUDS NEAR
THE COAST TOMORROW...WITH SOME LOW CLOUDS POSSIBLY PRESSING INLAND
AS THE DAY PROGRESSES. CONSEQUENTLY...WE CAN EXPECT COOLER
CONDITIONS IN MOST AREAS TOMORROW...ESPECIALLY NEAR THE COAST AND
IN THE COASTAL VALLEYS WHERE HIGH TEMPERATURES WILL LIKELY BE 10
TO 15 DEGREES COOLER COMPARED TO TODAY.

TOMORROW`S COOL-DOWN WILL BE SHORT-LIVED. THE SHORTWAVE TROUGH
WILL MOVE WELL OFF TO OUR EAST BY LATE FRIDAY NIGHT AND THE 00Z
NAM DEVELOPS LIGHT OFFSHORE FLOW ALOFT BY SATURDAY MORNING. THIS
SHOULD RESULT IN CLEARING IN MOST AREAS BY MIDDAY SATURDAY AS
WELL AS SLIGHT WARMING ON SATURDAY. MOSTLY CLEAR AND MILD
CONDITIONS ARE EXPECTED TO CONTINUE INTO SUNDAY AS WELL.

ANOTHER SHORTWAVE TROUGH IS FORECAST TO APPROACH THE COAST TO OUR
NORTH NEXT MONDAY. THIS WILL RESULT IN MODEST COOLING DURING THE
FIRST HALF OF THE WORK WEEK. ALL PRECIP WITH THE MONDAY SYSTEM IS
EXPECTED TO REMAIN WELL TO OUR NORTH. IN FACT...THE MEDIUM RANGE
MODELS AGREE THAT DRY CONDITIONS WILL PREVAIL THROUGH THE END OF
MARCH...AND THROUGH AT LEAST THE FIRST FEW DAYS OF APRIL AS WELL.

&&

.AVIATION...AS OF 9:45 PM PDT THURSDAY...FOG HAS DEVELOPED ALONG
THE COAST THIS EVENING AND WILL IMPACT MRY AND SNS. WARM AND DRY
AIRMASS OVER THE INTERIOR WILL KEEP FOG AND LOW CIGS OUT OF THE
SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH FRIDAY.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR FOR CIGS AND VSBYS THROUGH 12Z.
DRAINAGE WIND FROM THE SNS VALLEY EXPECTED TO PUSH FOG OUT AFTER
12Z.


&&

.MARINE...AS OF 9:45 PM PDT THURSDAY...A WEAK DISTURBANCE WILL
MOVE THROUGH THE AREA ON FRIDAY RESULTING IN LIGHTER WINDS. HIGH
PRESSURE WILL BUILD OFF THE CALIFORNIA COAST BEHIND THE SYSTEM
BRINGING INCREASING NORTHWEST WINDS FRIDAY NIGHT AND LASTING
THROUGH EARLY NEXT WEEK. SOUTHERLY SWELLS GENERATED FROM A SOUTH
PACIFIC TROPICAL CYCLONE WILL ARRIVE ALONG THE COAST FRIDAY AND
CONTINUE THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: W PI
MARINE: BELL

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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000
FXUS66 KMTR 270444
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
944 PM PDT THU MAR 26 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES ON FRIDAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN BY SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMER THAN NORMAL TEMPERATURES OVER THE WEEKEND.
COOLING IS THEN EXPECTED DURING THE FIRST HALF OF NEXT WEEK. DRY
WEATHER WILL CONTINUE WITH NO RAIN IN SIGHT THROUGH THE END OF THE
MONTH

&&

.DISCUSSION...AS OF 8:55 PM PDT THURSDAY...SUBSIDENCE WARMING
OCCURRED UNDER A WEST COAST RIDGE TODAY. THE 00Z OAK SOUNDING
SHOWS THAT THE AIRMASS BELOW 900 MB WARMED BY AS MUCH AS 6 DEGREES
C SINCE YESTERDAY. IN ADDITION...LIGHT OFFSHORE FLOW DEVELOPED
LAST NIGHT AND PERSISTED THROUGH EARLY AFTERNOON HOURS OF TODAY.
TODAY`S SEABREEZE WAS WEAK AND DEVELOPED LATE. THESE DEVELOPMENTS
RESULTED IN SEVERAL DAILY HIGH TEMPERATURE RECORDS ACROSS OUR
REGION TODAY...INCLUDING SAN JOSE WITH A HIGH OF 85 AND SALINAS
AIRPORT AT 90. THE SALINAS AIRPORT CAME WITHIN TWO DEGREES OF
MATCHING ITS RECORD HIGH FOR THE ENTIRE MONTH OF MARCH...WHICH WAS
SET JUST A DOZEN DAYS AGO ON MARCH 14.

LOW CLOUDS AND FOG BEGAN TO DEVELOP OVER THE COASTAL WATERS THIS
AFTERNOON AND LOW CLOUDS/FOG QUICKLY FILLED IN ALONG MOST OF OUR
COAST BY EARLY EVENING. A FORECAST UPDATE WAS COMPLETED EARLIER
THIS EVENING TO INCREASE CLOUD COVER AND ADD FOG TO COASTAL AREAS
OVERNIGHT AND INTO FRIDAY MORNING.

ONSHORE FLOW REMAINS WEAK AT THIS TIME AND INDICATIONS ARE THAT
THE MARINE LAYER IS QUITE SHALLOW. THUS...EXPECT MOST OF THE LOW
CLOUDS AND FOG TO REMAIN CONFINED TO AREAS NEAR THE OCEAN
THROUGH EARLY FRIDAY. PATCHY DENSE FOG IS LIKELY OVERNIGHT THROUGH
MID MORNING FRIDAY.

BOTH THE NAM AND WRF MODEL OUTPUT INDICATE INCREASING ONSHORE FLOW
DURING THE DAY ON FRIDAY AS A SHORTWAVE TROUGH APPROACHES THE PAC
NW AND FAR NORTHERN CA. THIS WILL MEAN PERSISTENT LOW CLOUDS NEAR
THE COAST TOMORROW...WITH SOME LOW CLOUDS POSSIBLY PRESSING INLAND
AS THE DAY PROGRESSES. CONSEQUENTLY...WE CAN EXPECT COOLER
CONDITIONS IN MOST AREAS TOMORROW...ESPECIALLY NEAR THE COAST AND
IN THE COASTAL VALLEYS WHERE HIGH TEMPERATURES WILL LIKELY BE 10
TO 15 DEGREES COOLER COMPARED TO TODAY.

TOMORROW`S COOL-DOWN WILL BE SHORT-LIVED. THE SHORTWAVE TROUGH
WILL MOVE WELL OFF TO OUR EAST BY LATE FRIDAY NIGHT AND THE 00Z
NAM DEVELOPS LIGHT OFFSHORE FLOW ALOFT BY SATURDAY MORNING. THIS
SHOULD RESULT IN CLEARING IN MOST AREAS BY MIDDAY SATURDAY AS
WELL AS SLIGHT WARMING ON SATURDAY. MOSTLY CLEAR AND MILD
CONDITIONS ARE EXPECTED TO CONTINUE INTO SUNDAY AS WELL.

ANOTHER SHORTWAVE TROUGH IS FORECAST TO APPROACH THE COAST TO OUR
NORTH NEXT MONDAY. THIS WILL RESULT IN MODEST COOLING DURING THE
FIRST HALF OF THE WORK WEEK. ALL PRECIP WITH THE MONDAY SYSTEM IS
EXPECTED TO REMAIN WELL TO OUR NORTH. IN FACT...THE MEDIUM RANGE
MODELS AGREE THAT DRY CONDITIONS WILL PREVAIL THROUGH THE END OF
MARCH...AND THROUGH AT LEAST THE FIRST FEW DAYS OF APRIL AS WELL.

&&

.AVIATION...AS OF 9:45 PM PDT THURSDAY...FOG HAS DEVELOPED ALONG
THE COAST THIS EVENING AND WILL IMPACT MRY AND SNS. WARM AND DRY
AIRMASS OVER THE INTERIOR WILL KEEP FOG AND LOW CIGS OUT OF THE
SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH FRIDAY.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...IFR FOR CIGS AND VSBYS THROUGH 12Z.
DRAINAGE WIND FROM THE SNS VALLEY EXPECTED TO PUSH FOG OUT AFTER
12Z.


&&

.MARINE...AS OF 9:45 PM PDT THURSDAY...A WEAK DISTURBANCE WILL
MOVE THROUGH THE AREA ON FRIDAY RESULTING IN LIGHTER WINDS. HIGH
PRESSURE WILL BUILD OFF THE CALIFORNIA COAST BEHIND THE SYSTEM
BRINGING INCREASING NORTHWEST WINDS FRIDAY NIGHT AND LASTING
THROUGH EARLY NEXT WEEK. SOUTHERLY SWELLS GENERATED FROM A SOUTH
PACIFIC TROPICAL CYCLONE WILL ARRIVE ALONG THE COAST FRIDAY AND
CONTINUE THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: W PI
MARINE: BELL

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 270358
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
858 PM PDT THU MAR 26 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES ON FRIDAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN BY SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMER THAN NORMAL TEMPERATURES OVER THE WEEKEND.
COOLING IS THEN EXPECTED DURING THE FIRST HALF OF NEXT WEEK. DRY
WEATHER WILL CONTINUE WITH NO RAIN IN SIGHT THROUGH THE END OF THE
MONTH

&&

.DISCUSSION...AS OF 8:55 PM PDT THURSDAY...SUBSIDENCE WARMING
OCCURRED UNDER A WEST COAST RIDGE TODAY. THE 00Z OAK SOUNDING
SHOWS THAT THE AIRMASS BELOW 900 MB WARMED BY AS MUCH AS 6 DEGREES
C SINCE YESTERDAY. IN ADDITION...LIGHT OFFSHORE FLOW DEVELOPED
LAST NIGHT AND PERSISTED THROUGH EARLY AFTERNOON HOURS OF TODAY.
TODAY`S SEABREEZE WAS WEAK AND DEVELOPED LATE. THESE DEVELOPMENTS
RESULTED IN SEVERAL DAILY HIGH TEMPERATURE RECORDS ACROSS OUR
REGION TODAY...INCLUDING SAN JOSE WITH A HIGH OF 85 AND SALINAS
AIRPORT AT 90. THE SALINAS AIRPORT CAME WITHIN TWO DEGREES OF
MATCHING ITS RECORD HIGH FOR THE ENTIRE MONTH OF MARCH...WHICH WAS
SET JUST A DOZEN DAYS AGO ON MARCH 14.

LOW CLOUDS AND FOG BEGAN TO DEVELOP OVER THE COASTAL WATERS THIS
AFTERNOON AND LOW CLOUDS/FOG QUICKLY FILLED IN ALONG MOST OF OUR
COAST BY EARLY EVENING. A FORECAST UPDATE WAS COMPLETED EARLIER
THIS EVENING TO INCREASE CLOUD COVER AND ADD FOG TO COASTAL AREAS
OVERNIGHT AND INTO FRIDAY MORNING.

ONSHORE FLOW REMAINS WEAK AT THIS TIME AND INDICATIONS ARE THAT
THE MARINE LAYER IS QUITE SHALLOW. THUS...EXPECT MOST OF THE LOW
CLOUDS AND FOG TO REMAIN CONFINED TO AREAS NEAR THE OCEAN
THROUGH EARLY FRIDAY. PATCHY DENSE FOG IS LIKELY OVERNIGHT THROUGH
MID MORNING FRIDAY.

BOTH THE NAM AND WRF MODEL OUTPUT INDICATE INCREASING ONSHORE FLOW
DURING THE DAY ON FRIDAY AS A SHORTWAVE TROUGH APPROACHES THE PAC
NW AND FAR NORTHERN CA. THIS WILL MEAN PERSISTENT LOW CLOUDS NEAR
THE COAST TOMORROW...WITH SOME LOW CLOUDS POSSIBLY PRESSING INLAND
AS THE DAY PROGRESSES. CONSEQUENTLY...WE CAN EXPECT COOLER
CONDITIONS IN MOST AREAS TOMORROW...ESPECIALLY NEAR THE COAST AND
IN THE COASTAL VALLEYS WHERE HIGH TEMPERATURES WILL LIKELY BE 10
TO 15 DEGREES COOLER COMPARED TO TODAY.

TOMORROW`S COOL-DOWN WILL BE SHORT-LIVED. THE SHORTWAVE TROUGH
WILL MOVE WELL OFF TO OUR EAST BY LATE FRIDAY NIGHT AND THE 00Z
NAM DEVELOPS LIGHT OFFSHORE FLOW ALOFT BY SATURDAY MORNING. THIS
SHOULD RESULT IN CLEARING IN MOST AREAS BY MIDDAY SATURDAY AS
WELL AS SLIGHT WARMING ON SATURDAY. MOSTLY CLEAR AND MILD
CONDITIONS ARE EXPECTED TO CONTINUE INTO SUNDAY AS WELL.

ANOTHER SHORTWAVE TROUGH IS FORECAST TO APPROACH THE COAST TO OUR
NORTH NEXT MONDAY. THIS WILL RESULT IN MODEST COOLING DURING THE
FIRST HALF OF THE WORK WEEK. ALL PRECIP WITH THE MONDAY SYSTEM IS
EXPECTED TO REMAIN WELL TO OUR NORTH. IN FACT...THE MEDIUM RANGE
MODELS AGREE THAT DRY CONDITIONS WILL PREVAIL THROUGH THE END OF
MARCH...AND THROUGH AT LEAST THE FIRST FEW DAYS OF APRIL AS WELL.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: W PI
MARINE: BELL

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 270358
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
858 PM PDT THU MAR 26 2015

.SYNOPSIS...A RETURN OF COASTAL FOG AND LIGHT ONSHORE FLOW WILL
MEAN COOLER TEMPERATURES ON FRIDAY...ESPECIALLY NEAR THE COAST.
ONSHORE FLOW WILL WEAKEN BY SATURDAY... AND RESULT IN MOSTLY CLEAR
SKIES AND WARMER THAN NORMAL TEMPERATURES OVER THE WEEKEND.
COOLING IS THEN EXPECTED DURING THE FIRST HALF OF NEXT WEEK. DRY
WEATHER WILL CONTINUE WITH NO RAIN IN SIGHT THROUGH THE END OF THE
MONTH

&&

.DISCUSSION...AS OF 8:55 PM PDT THURSDAY...SUBSIDENCE WARMING
OCCURRED UNDER A WEST COAST RIDGE TODAY. THE 00Z OAK SOUNDING
SHOWS THAT THE AIRMASS BELOW 900 MB WARMED BY AS MUCH AS 6 DEGREES
C SINCE YESTERDAY. IN ADDITION...LIGHT OFFSHORE FLOW DEVELOPED
LAST NIGHT AND PERSISTED THROUGH EARLY AFTERNOON HOURS OF TODAY.
TODAY`S SEABREEZE WAS WEAK AND DEVELOPED LATE. THESE DEVELOPMENTS
RESULTED IN SEVERAL DAILY HIGH TEMPERATURE RECORDS ACROSS OUR
REGION TODAY...INCLUDING SAN JOSE WITH A HIGH OF 85 AND SALINAS
AIRPORT AT 90. THE SALINAS AIRPORT CAME WITHIN TWO DEGREES OF
MATCHING ITS RECORD HIGH FOR THE ENTIRE MONTH OF MARCH...WHICH WAS
SET JUST A DOZEN DAYS AGO ON MARCH 14.

LOW CLOUDS AND FOG BEGAN TO DEVELOP OVER THE COASTAL WATERS THIS
AFTERNOON AND LOW CLOUDS/FOG QUICKLY FILLED IN ALONG MOST OF OUR
COAST BY EARLY EVENING. A FORECAST UPDATE WAS COMPLETED EARLIER
THIS EVENING TO INCREASE CLOUD COVER AND ADD FOG TO COASTAL AREAS
OVERNIGHT AND INTO FRIDAY MORNING.

ONSHORE FLOW REMAINS WEAK AT THIS TIME AND INDICATIONS ARE THAT
THE MARINE LAYER IS QUITE SHALLOW. THUS...EXPECT MOST OF THE LOW
CLOUDS AND FOG TO REMAIN CONFINED TO AREAS NEAR THE OCEAN
THROUGH EARLY FRIDAY. PATCHY DENSE FOG IS LIKELY OVERNIGHT THROUGH
MID MORNING FRIDAY.

BOTH THE NAM AND WRF MODEL OUTPUT INDICATE INCREASING ONSHORE FLOW
DURING THE DAY ON FRIDAY AS A SHORTWAVE TROUGH APPROACHES THE PAC
NW AND FAR NORTHERN CA. THIS WILL MEAN PERSISTENT LOW CLOUDS NEAR
THE COAST TOMORROW...WITH SOME LOW CLOUDS POSSIBLY PRESSING INLAND
AS THE DAY PROGRESSES. CONSEQUENTLY...WE CAN EXPECT COOLER
CONDITIONS IN MOST AREAS TOMORROW...ESPECIALLY NEAR THE COAST AND
IN THE COASTAL VALLEYS WHERE HIGH TEMPERATURES WILL LIKELY BE 10
TO 15 DEGREES COOLER COMPARED TO TODAY.

TOMORROW`S COOL-DOWN WILL BE SHORT-LIVED. THE SHORTWAVE TROUGH
WILL MOVE WELL OFF TO OUR EAST BY LATE FRIDAY NIGHT AND THE 00Z
NAM DEVELOPS LIGHT OFFSHORE FLOW ALOFT BY SATURDAY MORNING. THIS
SHOULD RESULT IN CLEARING IN MOST AREAS BY MIDDAY SATURDAY AS
WELL AS SLIGHT WARMING ON SATURDAY. MOSTLY CLEAR AND MILD
CONDITIONS ARE EXPECTED TO CONTINUE INTO SUNDAY AS WELL.

ANOTHER SHORTWAVE TROUGH IS FORECAST TO APPROACH THE COAST TO OUR
NORTH NEXT MONDAY. THIS WILL RESULT IN MODEST COOLING DURING THE
FIRST HALF OF THE WORK WEEK. ALL PRECIP WITH THE MONDAY SYSTEM IS
EXPECTED TO REMAIN WELL TO OUR NORTH. IN FACT...THE MEDIUM RANGE
MODELS AGREE THAT DRY CONDITIONS WILL PREVAIL THROUGH THE END OF
MARCH...AND THROUGH AT LEAST THE FIRST FEW DAYS OF APRIL AS WELL.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DYKEMA
AVIATION: W PI
MARINE: BELL

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 262343
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
443 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 262343
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
443 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 262343
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
443 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

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WWW.TWITTER.COM/NWSBAYAREA
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000
FXUS66 KMTR 262343
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
443 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 4:30 PM PDT THURSDAY...UPPER LEVEL HIGH BRINGING
A WARM AND DRY AIRMASS OVER THE AREA. VFR CONDITIONS THROUGH THE
PERIOD.

VICINITY OF KSFO...VFR THROUGH FRIDAY. BRIEF PERIOD OF WEST
SEABREEZE WINDS TO 15 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH FRIDAY.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 262144
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
244 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 10:30 AM PDT THURSDAY...VFR THROUGH THE PERIOD
WITH TYPICAL WESTERLY SEA BREEZE FOR THE AFTERNOON AND EARLY
EVENING HOURS. HIGH CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. GENERALLY LIGHT WINDS THIS
MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 20 KT THIS
AFTERNOON WITH GUSTS TO 25 KT. HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. GENERALLY LIGHT
WINDS THIS MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 12 KT
THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 262144
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
244 PM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. RECORD TEMPERATURES WILL BE POSSIBLE. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 02:45 PM PDT THURSDAY... A STRONG HIGH PRESSURE
RIDGE IS LOCATED DIRECTLY OVER CALIFORNIA THIS AFTERNOON.
TEMPERATURES HAVE SOARED OVER THE LAST HOUR WITH NUMEROUS REPORTS
OF TEMPERATURES IN THE 70S ALONG THE COAST AND 80S AT INLAND
LOCATIONS. AS OF 2PM... DOWNTOWN SAN FRANCISCO IS RUNNING 77F
WHICH IS 11F WARMER THAN YESTERDAY AT 2PM. SALINAS IS 88F WHICH IS
14 DEGREES ABOVE 2PM YESTERDAY. MESONET STATIONS NEAR CUPERTINO
SHOW TEMPERATURES AROUND 86F AS OF 2PM... WHICH IS THE WARMEST
POCKET WITHIN THE IMMEDIATE BAY AREA. ANOTHER 2 TO 3 HOURS OF
WARMING ARE POSSIBLE FOR LOCATIONS AWAY FROM THE IMMEDIATE
SHORELINE AS THE ATMOSPHERE WARMS TO 15-16CAT 850MB. TEMPERATURES
AT 850MB HAVE RISEN 4-6C OVER THE LAST 14 HOURS AND ARE CORRESPONDING
TO SURFACE TEMPERATURES THAT ARE ANYWHERE BETWEEN 10 AND 25F
DEGREES WARMER AT THE SURFACE. THIS HIGH PRESSURE SYSTEM IS NEARLY
2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH TYPICALLY
CORRESPONDS TO UNSEASONABLY WARM TEMPERATURES THAT ARE WITHIN A
FEW DEGREES OF RECORD VALUES. AS OF 2PM... RECORD TEMPERATURES
ARE IMMINENT AT SAN JOSE...SALINAS...NAPA...AND GILROY. OAKLAND
MUSEUM IS WITHIN A FEW DEGREES AS WELL...HOWEVER TEMPERATURES
THERE WILL NOT SEE MUCH ADDITIONAL WARMING AFTER THE NEXT HOUR.
TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER ON FRIDAY AS THE
RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN AND THE OFFSHORE
GRADIENTS WEAKEN. REGIONS IN THE NORTH BAY WILL SEE THE MOST
COOLING INTO FRIDAY WHEREAS SAN BENITO COUNTY WILL REMAIN THE
WARMEST.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA...
AND THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN INTO
THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.AVIATION...AS OF 10:30 AM PDT THURSDAY...VFR THROUGH THE PERIOD
WITH TYPICAL WESTERLY SEA BREEZE FOR THE AFTERNOON AND EARLY
EVENING HOURS. HIGH CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. GENERALLY LIGHT WINDS THIS
MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 20 KT THIS
AFTERNOON WITH GUSTS TO 25 KT. HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. GENERALLY LIGHT
WINDS THIS MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 12 KT
THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:09 PM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...NONE.

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 261729
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1029 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 10:30 AM PDT THURSDAY...VFR THROUGH THE PERIOD
WITH TYPICAL WESTERLY SEA BREEZE FOR THE AFTERNOON AND EARLY
EVENING HOURS. HIGH CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. GENERALLY LIGHT WINDS THIS
MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 20 KT THIS
AFTERNOON WITH GUSTS TO 25 KT. HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. GENERALLY LIGHT
WINDS THIS MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 12 KT
THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 261729
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1029 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.

&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 10:30 AM PDT THURSDAY...VFR THROUGH THE PERIOD
WITH TYPICAL WESTERLY SEA BREEZE FOR THE AFTERNOON AND EARLY
EVENING HOURS. HIGH CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. GENERALLY LIGHT WINDS THIS
MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 20 KT THIS
AFTERNOON WITH GUSTS TO 25 KT. HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. GENERALLY LIGHT
WINDS THIS MORNING WILL INCREASE OUT OF THE WEST TO 10 TO 12 KT
THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 261625
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
925 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.


&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 261625
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
925 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.


&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 261625
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
925 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.


&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

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000
FXUS66 KMTR 261625
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
925 AM PDT THU MAR 26 2015

.SYNOPSIS...TODAY WILL BE THE WARMEST DAY OF THE WEEK AS WARMING
TREND CONTINUES. DRY WEATHER CONDITIONS WILL ALSO CONTINUE THROUGH THE
FORECAST PERIOD WITH TEMPERATURES COOLING SLIGHTLY OVER THE
WEEKEND.

&&

.DISCUSSION...AS OF 09:30 AM PDT THURSDAY... A DOMINANT HIGH
PRESSURE RIDGE IS OVER CALIFORNIA THIS MORNING. THIS FEATURE IS
FORECAST TO REMAIN DIRECTLY OVER OUR FORECAST AREA TODAY AND LEAD
TO UNSEASONABLY WARM TEMPERATURES THROUGH THE AFTERNOON.
TEMPERATURES AT 850MB ARE EXPECTED TO RISE TO 14-15C THIS
AFTERNOON... WHICH IS A 4-5C INCREASE OVER YESTERDAY AND 10 TO 15F
ABOVE NORMAL FOR THIS TIME OF THE YEAR. THIS HIGH PRESSURE SYSTEM
IS NEARLY 2 STANDARD DEVIATIONS STRONGER THAN NORMAL WHICH
TYPICALLY CORRESPONDS TO WARM TEMPERATURES THAT ARE WITHIN A FEW
DEGREES OF RECORD VALUES. MODEL DATA ALSO SUGGESTS RECORD
TEMPERATURES FOR MOST LOCATIONS WILL LIKELY BE A FEW DEGREES OUT
OF REACH. THE MOST LIKELY AREA TO SEE RECORDS MATCHED OR BROKEN
WILL BE THE SOUTH BAY AS IT IS IN THE SWEET SPOT OF LOWER RECORD
VALUES AND UNDER THE STRONGEST WARMING. OFFSHORE FLOW IS
EXPECTED TODAY AND WILL FURTHER ENHANCE THE WARMING FROM
SUBSIDENCE ALOFT. TEMPERATURES ARE EXPECTED ONLY MARGINALLY COOLER
ON FRIDAY AS THE RIDGE SHIFTS DOWNSTREAM INTO THE GREAT BASIN. THE
NORTH BAY WILL SEE THE MOST COOLING INTO FRIDAY. THE CURRENT
FORECAST APPEARS ON TRACK... BUT I MAY MODIFY MAXIMUM TEMPERATURES
AFTER FURTHER REVIEW THIS MORNING.

THE WEATHER PATTERN SHIFTS EARLY SATURDAY AS A DRY FRONTAL
BOUNDARY MOVES INTO THE AREA. MODELS ARE IN GENERAL AGREEMENT THAT
THIS SYSTEM WEAKENS TO SOME DEGREE AS IT MOVES OVER THE AREA... AND
THAT PRECIPITATION IS UNLIKELY. ONSHORE FLOW WILL INCREASE AND
SOME COOLING WILL OCCUR ON SATURDAY AS MOISTURE/CLOUDS RETURN
INTO THE REGION. RIDGING IS SET TO BUILD BACK INTO THE REGION NEXT
WEEK... LEADING TO MODERATELY ABOVE AVERAGE TEMPERATURES AND NO
PRECIPITATION.


&&

.PREV DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:52 AM PDT THURSDAY...A FAIRLY WEAK PRESSURE
GRADIENT WILL LEAD TO LIGHT WINDS THROUGH TONIGHT. A THERMAL
TROUGH WILL BEGIN TO BUILD ALONG THE COAST FRIDAY RESULTING IN
INCREASING WINDS OVER THE COASTAL WATERS. THESE STRENGTHENING
WINDS WILL GENERATE STEEP SEAS THROUGH THE WEEKEND.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 261130
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
430 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 261130
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
430 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 261130
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
430 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 261130
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
430 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 4:30 AM PDT THURSDAY...A RIDGE OF HIGH PRESSURE
POSITIONED OVER THE WEST COAST IS SUPRESSING CLOUDS THIS
MORNING...PROMOTING CLEAR SKIES. NEAR THE SURFACE LIGHT OFFSHORE
FLOW IS ALSO PREVENTING ANY OCEAN STRATUS FROM MOVING INTO THE
AREA. UNDER THIS RIDGE OF HIGH PRESSURE WINDS SHOULD REMAIN LIGHT
THIS MORNING AND ARE EXPECTED TO INCREASE WITH THE AFTERNOON SEA
BREEZE...THEN DECREASE ONCE AGAIN BY SUNSET. THESE CONDITIONS SHOULD
PERSIST THROUGH THE NEXT 24 TO 36 HOURS.

VICINITY OF KSFO...VFR IS EXPECTED TO PERSIST THROUGH THE NEXT 24
TO 36 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL INCREASE OUT
OF THE WEST TO 10 TO 20 KT THIS AFTERNOON WITH GUSTS TO 25 KT.

CONFIDENCE IS HIGH.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR IS EXPECTED TO PERSIST THROUGH
THE NEXT 24 HOURS. GENERALLY LIGHT WINDS THIS MORNING WILL
INCREASE OUT OF THE WEST TO 10 TO 12 KT THIS AFTERNOON.

CONFIDENCE IS HIGH.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 261017
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
317 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 261017
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
317 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 261017
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
317 AM PDT THU MAR 26 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH FRIDAY
AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER CONDITIONS
WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH TEMPERATURES
COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 3:17 AM PDT THURSDAY...SKIES ARE MOSTLY CLEAR
ACROSS THE AREA...BUT AN AREA OF STRATUS IS FILLING IN ALONG THE
COAST. SOME PATCHY FOG IS FORMING IN PARTS OF THE NORTH BAY AS
WELL AS ALONG THE SAN FRANCISCO PENINSULA COAST. THE SURFACE
PRESSURE GRADIENTS ARE STILL MOSTLY OFFSHORE WITH 6.3 MB FROM WMC
TO SFO...THUS STRATUS AND FOG ARE NOT EXPECTED TO SPREAD FAR
INLAND THIS MORNING.

MEANWHILE A FAIRLY STRONG UPPER LEVEL RIDGE IS PUSHING EASTWARD
OVER CALIFORNIA WITH THE RIDGE AXIS EXPECTED TO BE CENTERED OVER
THE STATE TODAY. A WARMING TREND IS IN PROGRESS AND TODAY IS
EXPECTED TO BE THE WARMEST DAY IN MOST AREAS WITH HIGHS FORECAST
TO RANGE FROM THE UPPER 60S TO LOWER 70S AT THE COAST...TO THE 70S
AND 80S INLAND...WITH WARMEST AREAS HEATING INTO THE LOWER 90S.
THESE WARMEST AREAS WILL BE CONFINED TO SOUTHERN MONTEREY AND SAN
BENITO COUNTIES. FRIDAY WILL BE SIMILARLY HOT IN THE SOUTHERN
INTERIOR SECTIONS OF THE CWA...HOWEVER THE REST OF THE DISTRICT IS
EXPECTED TO SEE SOME COOLING AS THE UPPER RIDGE WEAKENS AS A DRY
FRONTAL BAND APPROACHES THE COAST SWITCHING THE WINDS TO ONSHORE.
THIS DRY FRONT IS PROGGED TO MOVE ACROSS NORTHERN CALIFORNIA ON
SATURDAY...AND IT IS EXPECTED TO INCREASE THE ONSHORE FLOW AND
BRING ADDITIONAL COOLING TO THE AREA. HIGHS ON SATURDAY ARE
FORECAST TO BE 5 TO 10 DEGREES COOLER THAN EXPECTED HIGHS TODAY.

A WEAK RIDGE OR ZONAL FLOW ALOFT WILL SETTLE IN OVER THE WEST
BEGINNING ON SUNDAY KEEPING TEMPERATURES SEASONABLY MILD THROUGH
THE PERIOD. DRY CONDITIONS WILL ALSO CONTINUE INTO EARLY APRIL.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 02:01 AM PDT THURSDAY...HIGH PRESSURE BUILDING
OVER THE GREAT BASIN WILL CAUSE DECREASING WINDS THURSDAY AND
FRIDAY. A DRY FRONTAL SYSTEM WILL MOVE THROUGH THE AREA FRIDAY
NIGHT WITH HIGH PRESSURE BUILDING OFF THE CALIFORNIA COAST BEHIND
THE SYSTEM. THIS WILL RESULT IN INCREASING NORTHWEST WINDS
SATURDAY THROUGH SUNDAY.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDAY...NONE.

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: LARRY
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 260550
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1050 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 260550
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1050 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 260550
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1050 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









000
FXUS66 KMTR 260550
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1050 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.

&&

.AVIATION...AS OF 10:45 PM PDT WEDNESDAY...A FEW LOW CLOUDS ALONG
THE COAST THIS EVENING BUT DRIER AIR COMBINED WITH A STRENGTHENING
NORTHERLY GRADIENT AT THE SURFACE WILL KEEP VFR CONDITIONS IN THE
SFO AND MRY BAY AREAS.

VICINITY OF KSFO...VFR.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 260354
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
854 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.


&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA








000
FXUS66 KMTR 260354
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
854 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 9:00PM PDT WEDNESDAY... A 582DM HIGH PRESSURE
RIDGE IS DOMINATING THE REGIONAL WEATHER PATTERN THIS EVENING. THE
RIDGE IS CENTERED JUST OFFSHORE AROUND 35N 135W AND AMPLIFIED
NORTHWARD INTO CANADA ALONG THE PACIFIC COASTLINE. TEMPERATURES
HAVE BEEN TRENDING HIGHER AS THE HIGH PRESSURE HAS STRENGTHENED
INTO THE FORECAST AREA... AND WERE ANYWHERE FROM A FEW TO 10
DEGREES WARMER TODAY VERSUS YESTERDAY WHICH ARE BETWEEN 5 TO 15
DEGREES ABOVE NORMAL. TEMPERATURES ARE FORECAST TO INCREASE MORESO
TOMORROW AS A RESULT OF THE RIDGE SHIFTING ONSHORE AND ENHANCING
SUBSIDENCE ALOFT AND OFFSHORE FLOW. THURSDAY IS EXPECTED TO BE THE
WARMEST DAY OF THE WEEK AS TEMPERATURES RANGING IN THE 80S
POSSIBLE FOR THE INLAND LOCATIONS AND SOME RECORD TEMPERATURES MAY
IN PLAY. THE SOUTHERN SALINAS VALLEY COULD EVEN SEE TEMPERATURES
PUSH INTO THE LOWER 90S AS THE RIDGE MOVE DIRECTLY ALOFT.
TEMPERATURES WILL TREND DOWN SLIGHTLY ON FRIDAY AS THE HIGH
PRESSURE SYSTEM SHIFTS DOWNSTREAM.

A WEAK STORM SYSTEM WILL MOVE ACROSS NORTHERN CALIFORNIA EARLY
INTO THE WEEKEND. AS WITH MANY OF THE WEAKER SYSTEMS OF LATE...
THIS SYSTEM WILL PASS TOO FAR TO THE NORTH AND WILL BE TOO DRY TO
BRING PRECIPITATION TO THE REGION. INSTEAD... EXPECT A GRADUAL
COOLING AND MOISTENING TREND AS ONSHORE FLOW AND INCREASE CLOUD
COVER RETURNS TO THE REGION. MEDIUM TERM MODELS BUILD ANOTHER...
SLIGHTLY WEAKER... RIDGE INTO THE REGION LATE SUNDAY. THERE IS
GENERAL CONSENSUS AMONG THE MODELS THAT THIS PATTERN WILL PERSIST
INTO MIDWEEK NEXT WEEK... WITH TEMPERATURES UP TO 5 TO 10 DEGREES
ABOVE NORMAL POSSIBLE. PRECIPITATION LOOKS DOUBTFUL OVER THE NEXT
WEEK... AND WILL BECOME INCREASINGLY UNLIKELY AS WE MOVE FURTHER
AWAY FROM THE RAINY SEASON.


&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 08:16 PM PDT WEDNESDAY...MODERATE NORTHWESTERLY
WINDS WILL CONTINUE TONIGHT. WINDS WILL DECREASE SOME TOMORROW BUT
WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE PRESSURE
GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: DRP
AVIATION/MARINE: W PI
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

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WWW.TWITTER.COM/NWSBAYAREA
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000
FXUS66 KMTR 260044
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
544 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
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000
FXUS66 KMTR 260044
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
544 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 260044
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
544 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA






000
FXUS66 KMTR 260044
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
544 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 5:30 PM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD.

VICINITY OF KSFO...VFR. NORTHWEST WINDS 15-20 KT THROUGH 04Z.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION: W PI
MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA







000
FXUS66 KMTR 252125
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
225 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 10:45 AM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD. LOCALLY BREEZY
CONDITIONS DURING THE AFTERNOON DUE TO THE SEA BREEZE. HIGH
CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. WESTERLY WINDS
WILL INCREASE TO AROUND 18 KT THIS AFTERNOON WITH GUSTS TO 22 KT.
HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. WESTERLY
WINDS WILL INCREASE TO AROUND 12 KT THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

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000
FXUS66 KMTR 252125
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
225 PM PDT WED MAR 25 2015

.SYNOPSIS...A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE
IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST. DRY WEATHER
CONDITIONS WILL ALSO CONTINUE THROUGH THE FORECAST PERIOD WITH
TEMPERATURES COOLING SLIGHTLY OVER THE WEEKEND.

&&

.DISCUSSION...AS OF 2:25 PM PDT WEDNESDAY...WITH HIGH PRESSURE
ALOFT...LIGHT OFFSHORE FLOW AND SUNNY SKIES...AFTERNOON
TEMPERATURES ARE RUNNING WARMER THAN YESTERDAY BY 3 TO 11 DEGREES.
AFTERNOON READINGS ARE RANGING FROM THE LOWER TO MID 60S AT THE
COAST TO THE 70S TO LOWER 80S INLAND.

THE SURFACE PRESSURE GRADIENTS CONTINUE TO TREND MORE OFFSHORE
WITH THE WMC-SFO GRADIENT HOLDING AT 4.9 MB...BUT IS FORECAST TO
TIGHTEN TO 7.5 MB BY THURSDAY MORNING (BY THE NAM12). THE SFO-
SAC GRADIENT NOW DOWN TO 0.5 MB...AND THE ACV-SFO GRADIENT IS
ALSO NOW UP TO 3.7 MB. AS THE UPPER RIDGE AXIS CONTINUES TO EDGE
EASTWARD...AND THE OFFSHORE GRADIENTS PERSIST...LOOK FOR A WARMING
TREND TO CONTINUE THROUGH FRIDAY. THE WARMEST DAY IS EXPECTED TO
BE TOMORROW AROUND THE SAN FRANCISCO BAY AREA WITH HIGH TEMPS IN
THE 70S TO LOWER 80S...WITH A FEW AREAS IN THE SOUTHERN SALINAS
VALLEY TOPPING OUT IN THE LOWER 90S. ON FRIDAY THE SOUTHERN
INTERIOR SECTIONS OF MONTEREY COUNTY AS WELL AS PORTIONS OF SAN
BENITO COUNTIES WILL SEE THE WARMEST TEMPS WITH READINGS IN THE
LOWER TO MID 90S POSSIBLE.

BY LATE FRIDAY AND ON SATURDAY...A DRY FRONTAL BAND IS PROGGED TO MOVE
ACROSS NORTHERN CALIFORNIA. WHILE THIS SYSTEM IS NOT EXPECTED TO
BRING ANY PRECIPITATION TO THE AREA...IT IS EXPECTED TO INCREASE
THE ONSHORE FLOW FOR STRONGER WINDS AND COOLER TEMPERATURES. HIGH
PRESSURE WILL SLOWLY REBUILD ALONG THE COAST BEGINNING LATE SUNDAY FOR
GRADUAL...MODERATE WARMING INTO NEXT WEEK.

&&

.AVIATION...AS OF 10:45 AM PDT WEDNESDAY...DRIER AIR COMBINED WITH
A STRENGTHENING NORTHERLY GRADIENT AT THE SURFACE WILL HELP TO
MAINTAIN VFR CONDITIONS THROUGH THE PERIOD. LOCALLY BREEZY
CONDITIONS DURING THE AFTERNOON DUE TO THE SEA BREEZE. HIGH
CONFIDENCE.

VICINITY OF KSFO...VFR THROUGH THE PERIOD. WESTERLY WINDS
WILL INCREASE TO AROUND 18 KT THIS AFTERNOON WITH GUSTS TO 22 KT.
HIGH CONFIDENCE.

SFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...VFR THROUGH THE PERIOD. WESTERLY
WINDS WILL INCREASE TO AROUND 12 KT THIS AFTERNOON. HIGH CONFIDENCE.

&&

.CLIMATE...BELOW ARE RECORD DAILY HIGH TEMPERATURES FOR THURSDAY
(3/26) AND FRIDAY (3/27):

                          THU 3/26 RECORD     FRI 3/27 RECORD
CLIMATE STATION           HIGH AND YEAR       HIGH AND YEAR

SF BAY AREA...
  KENTFIELD                88 IN 1930          90 IN 1923
  SAN RAFAEL               84 IN 1988          82 IN 1969
  NAPA                     86 IN 1988          86 IN 1930
  SAN FRANCISCO DOWNTOWN   82 IN 1930          84 IN 1923
  SAN FRANCISCO AIRPORT    79 IN 1952          77 IN 1986
  OAKLAND MUSEUM           80 IN 1988          79 IN 1986
  OAKLAND AIRPORT          80 IN 1952          82 IN 1951
  RICHMOND                 84 IN 1970          82 IN 1952
  LIVERMORE                88 IN 1988          82 IN 1969
  MOFFETT FIELD            83 IN 1988          82 IN 1969
  SAN JOSE                 84 IN 1988          85 IN 1923
  GILROY                   87 IN 1997          85 IN 1969

MONTEREY BAY AREA...
  MONTEREY                 84 IN 1988          80 IN 1969
  SANTA CRUZ               88 IN 1988          87 IN 1969
  SALINAS                  88 IN 1969          85 IN 1969
  SALINAS AIRPORT          87 IN 1988          80 IN 1969
  KING CITY                89 IN 1988          86 IN 1969

&&

.MARINE...AS OF 01:20 PM PDT WEDNESDAY...LOOK FOR STRENGTHENING
NORTH WESTERLY WINDS ACROSS THE COASTAL WATERS WHICH WILL RESULT
IN DETERIORATING SEA CONDITIONS. WINDS WILL DECREASE SOME ON
THURSDAY BUT WILL INCREASE ONCE AGAIN ON FRIDAY AS THE SURFACE
PRESSURE GRADIENT INCREASES ONCE AGAIN.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...MONTEREY BAY UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 0-10 NM UNTIL 11 PM
             SCA...PT REYES TO PIGEON PT 0-10 NM UNTIL 11 PM
             SCA...PIGEON PT TO PT PINOS 0-10 NM UNTIL 11 PM
             SCA...PT ARENA TO PT REYES 10-60 NM UNTIL 2 AM
             SCA...PT REYES TO PIGEON PT 10-60 NM UNTIL 2 AM
             SCA...PIGEON PT TO PT PINOS 10-60 NM UNTIL 2 AM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM UNTIL 11 PM
             SCA...PT PINOS TO PT PIEDRAS BLANCAS 10-60 NM UNTIL 11 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: BELL
CLIMATE: DYKEMA

VISIT US AT WEATHER.GOV/SANFRANCISCO

FOLLOW US ON FACEBOOK, TWITTER, AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSBAYAREA
WWW.TWITTER.COM/NWSBAYAREA
WWW.YOUTUBE.COM/NWSBAYAREA









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