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000
FXUS66 KSGX 302038
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
138 PM PDT MON MAR 30 2015

.SYNOPSIS...
A FEW UPPER-LEVEL TROUGHS MOVING BY TO OUR NORTH WILL HELP DEEPEN
THE MARINE LAYER...CREATE SLIGHTLY COOLER WEATHER AND DEVELOP
BREEZY WESTERLY WINDS IN THE MOUNTAINS AND DESERTS THROUGH MID
WEEK. WEAK OFFSHORE FLOW WILL CREATE WARMING AND PUSH THE MARINE
LAYER OFF THE COAST ON FRIDAY...WITH GUSTY NORTHEAST WINDS NEAR
THE COASTAL FOOTHILLS. NEXT WEEKEND...A LOW PRESSURE SYSTEM
DEVELOPING OVER THE EASTERN PACIFIC WILL DEVELOP SLIGHTLY COOLER
WEATHER...A RETURN OF THE MARINE LAYER...AND BREEZY WESTERLY WINDS
IN THE MOUNTAINS AND DESERTS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 30/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE END OF THE WORK WEEK.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 450 MILES S OF SAN DIEGO...AND A WEAK UPPER-LEVEL
RIDGE OFF THE COAST OF SW CA. VISIBLE SATELLITE SHOWED MOSTLY
CLEAR SKIES ACROSS THE CWA.

A FEW TROUGHS MOVING BY TO OUR NORTH THIS WEEK WILL LOWER HIGH
TEMPERATURES TO NEAR NORMAL BY THURSDAY...CREATE BREEZY WESTERLY
WINDS IN THE MOUNTAINS AND DESERTS...AND DEEPEN THE MARINE LAYER
THROUGH MID WEEK. ISOLATED WESTERLY WIND GUSTS TO 50 MPH WILL BE
POSSIBLE OVER THE MOUNTAINS AND DESERTS TUESDAY AND WEDNESDAY
NIGHTS. NIGHT AND MORNING LOW CLOUDS/FOG WILL PUSH INTO THE FAR
INLAND VALLEYS BY WEDNESDAY MORNING.

SURFACE HIGH PRESSURE BUILDING OVER THE GREAT BASIN AND SURFACE
LOW PRESSURE OFF THE COAST WILL CREATE WEAK OFFSHORE FLOW AND
SLIGHTLY WARMER WEATHER FOR THE COAST AND VALLEYS ON FRIDAY. AN
OFFSHORE SURFACE PRESSURE GRADIENT AROUND -14 MB FROM SAN DIEGO TO
SALT LAKE CITY WILL CREATE ISOLATED NORTHEASTERLY WIND GUSTS TO 45
MPH THROUGH AND BELOW MOUNTAIN PASSES AND CANYONS FRIDAY MORNING.
THESE WINDS WILL HELP TO PUSH THE MARINE LAYER CLOUDS OFF THE
COAST THURSDAY NIGHT. HIGH TEMPERATURES OVER MOST COASTAL AND
VALLEY AREAS WILL BE RISE INTO THE 80S...WITH 70S ALONG THE
IMMEDIATE COAST.

ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A TROUGH
APPROACHES FROM THE WEST...LOWERING HIGH TEMPERATURES TO SLIGHTLY
ABOVE NORMAL FOR THIS TIME OF YEAR AND REDEVELOPING THE MARINE
LAYER BY SUNDAY MORNING. BREEZY WESTERLY WINDS...WITH LOCAL GUSTS
NEAR 50 MPH...WILL BE POSSIBLE LATE SUNDAY INTO MONDAY OVER
PORTIONS OF THE MOUNTAINS AND DESERTS.

&&

.AVIATION...
302022Z...COAST/VALLEYS...THROUGH 31/0100 UTC...MOSTLY
UNRESTRICTED VIS AND SKC. 31/0100-1500 UTC...STRATUS GRADUALLY
DEVELOPING 15-20 SM INLAND...WITH BASES 800-1100 FT MSL...TOPS
1300-1600 FT MSL...AND LOCAL VIS AOB 1 SM OVER HIGHER COASTAL
TERRAIN AND INLAND MESAS. MARINE LAYER INVERSION OF ABOUT 6
DEGREES EXPECTED. FORECAST CONFIDENCE ON STRATUS OCCURRENCE AT
KSAN...KCRQ AND KSNA IS HIGH...WITH MODERATE CONFIDENCE IN TIMING
AND BASE/TOP HEIGHTS. CHANCE THAT STRATUS/FOG WILL MAKE IT INTO
KONT FOR A FEW HOURS...BUT CONFIDENCE IS LOW. STRATUS/FOG CLEARING
TO THE COASTAL WATERS 31/1500-1800 UTC.

DESERTS/MTNS...UNRESTRICTED VIS THROUGH TUESDAY MORNING.
SKC...BECOMING SCT CLOUDS AOA 20000 FT MSL AFTER 31/0600 UTC.

&&

.MARINE...
122 PM...STEEP SEAS OF 10 FEET AND NORTHWEST WIND GUSTS TO 25 KT
WILL BE POSSIBLE ON THURSDAY OVER THE OUTER WATERS AS A TROUGH
MOVES INLAND NORTH OF THE AREA. THIS COULD RESULT IN HAZARDOUS
CONDITIONS TO SMALL CRAFT. FORECAST CONFIDENCE IS MODERATE.
OTHERWISE...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
FRIDAY.

&&

.BEACHES...
A 4-5 FOOT/17 SECOND SOUTH SWELL IS BRINGING WIDESPREAD 4-6 FOOT
SURF TO ORANGE COUNTY BEACHES...AND SOME SAN DIEGO COUNTY
BEACHES... THIS AFTERNOON. SOME BEACHES IN ORANGE COUNTY HAVE
REPORTED 5-7 FOOT SURF AS WELL. THESE SURF CONDITIONS...ALONG WITH
A HIGH RISK OF STRONG RIP CURRENTS...WILL CONTINUE THIS
AFTERNOON...WITH THE SWELL AND SURF FALLING TONIGHT INTO TUESDAY.

WAVE WATCH 3 INDICATES AN 8 FOOT/11 SECOND WEST-NORTHWEST SWELL
MOVING IN ON WEDNESDAY...WITH A 10 FOOT/11 SECOND WEST-NORTHWEST
SWELL THEN OCCURRING ON THURSDAY. ALTHOUGH THE PERIOD ON THESE
SWELLS WILL BE SOMEWHAT SHORT...THE SWELL HEIGHTS WILL BE LARGE
ENOUGH TO BRING AT LEAST 4-6 FOOT SURF AND AN INCREASED RISK OF
RIP CURRENTS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...HARRISON





000
FXUS66 KSGX 302038
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
138 PM PDT MON MAR 30 2015

.SYNOPSIS...
A FEW UPPER-LEVEL TROUGHS MOVING BY TO OUR NORTH WILL HELP DEEPEN
THE MARINE LAYER...CREATE SLIGHTLY COOLER WEATHER AND DEVELOP
BREEZY WESTERLY WINDS IN THE MOUNTAINS AND DESERTS THROUGH MID
WEEK. WEAK OFFSHORE FLOW WILL CREATE WARMING AND PUSH THE MARINE
LAYER OFF THE COAST ON FRIDAY...WITH GUSTY NORTHEAST WINDS NEAR
THE COASTAL FOOTHILLS. NEXT WEEKEND...A LOW PRESSURE SYSTEM
DEVELOPING OVER THE EASTERN PACIFIC WILL DEVELOP SLIGHTLY COOLER
WEATHER...A RETURN OF THE MARINE LAYER...AND BREEZY WESTERLY WINDS
IN THE MOUNTAINS AND DESERTS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 30/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE END OF THE WORK WEEK.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 450 MILES S OF SAN DIEGO...AND A WEAK UPPER-LEVEL
RIDGE OFF THE COAST OF SW CA. VISIBLE SATELLITE SHOWED MOSTLY
CLEAR SKIES ACROSS THE CWA.

A FEW TROUGHS MOVING BY TO OUR NORTH THIS WEEK WILL LOWER HIGH
TEMPERATURES TO NEAR NORMAL BY THURSDAY...CREATE BREEZY WESTERLY
WINDS IN THE MOUNTAINS AND DESERTS...AND DEEPEN THE MARINE LAYER
THROUGH MID WEEK. ISOLATED WESTERLY WIND GUSTS TO 50 MPH WILL BE
POSSIBLE OVER THE MOUNTAINS AND DESERTS TUESDAY AND WEDNESDAY
NIGHTS. NIGHT AND MORNING LOW CLOUDS/FOG WILL PUSH INTO THE FAR
INLAND VALLEYS BY WEDNESDAY MORNING.

SURFACE HIGH PRESSURE BUILDING OVER THE GREAT BASIN AND SURFACE
LOW PRESSURE OFF THE COAST WILL CREATE WEAK OFFSHORE FLOW AND
SLIGHTLY WARMER WEATHER FOR THE COAST AND VALLEYS ON FRIDAY. AN
OFFSHORE SURFACE PRESSURE GRADIENT AROUND -14 MB FROM SAN DIEGO TO
SALT LAKE CITY WILL CREATE ISOLATED NORTHEASTERLY WIND GUSTS TO 45
MPH THROUGH AND BELOW MOUNTAIN PASSES AND CANYONS FRIDAY MORNING.
THESE WINDS WILL HELP TO PUSH THE MARINE LAYER CLOUDS OFF THE
COAST THURSDAY NIGHT. HIGH TEMPERATURES OVER MOST COASTAL AND
VALLEY AREAS WILL BE RISE INTO THE 80S...WITH 70S ALONG THE
IMMEDIATE COAST.

ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A TROUGH
APPROACHES FROM THE WEST...LOWERING HIGH TEMPERATURES TO SLIGHTLY
ABOVE NORMAL FOR THIS TIME OF YEAR AND REDEVELOPING THE MARINE
LAYER BY SUNDAY MORNING. BREEZY WESTERLY WINDS...WITH LOCAL GUSTS
NEAR 50 MPH...WILL BE POSSIBLE LATE SUNDAY INTO MONDAY OVER
PORTIONS OF THE MOUNTAINS AND DESERTS.

&&

.AVIATION...
302022Z...COAST/VALLEYS...THROUGH 31/0100 UTC...MOSTLY
UNRESTRICTED VIS AND SKC. 31/0100-1500 UTC...STRATUS GRADUALLY
DEVELOPING 15-20 SM INLAND...WITH BASES 800-1100 FT MSL...TOPS
1300-1600 FT MSL...AND LOCAL VIS AOB 1 SM OVER HIGHER COASTAL
TERRAIN AND INLAND MESAS. MARINE LAYER INVERSION OF ABOUT 6
DEGREES EXPECTED. FORECAST CONFIDENCE ON STRATUS OCCURRENCE AT
KSAN...KCRQ AND KSNA IS HIGH...WITH MODERATE CONFIDENCE IN TIMING
AND BASE/TOP HEIGHTS. CHANCE THAT STRATUS/FOG WILL MAKE IT INTO
KONT FOR A FEW HOURS...BUT CONFIDENCE IS LOW. STRATUS/FOG CLEARING
TO THE COASTAL WATERS 31/1500-1800 UTC.

DESERTS/MTNS...UNRESTRICTED VIS THROUGH TUESDAY MORNING.
SKC...BECOMING SCT CLOUDS AOA 20000 FT MSL AFTER 31/0600 UTC.

&&

.MARINE...
122 PM...STEEP SEAS OF 10 FEET AND NORTHWEST WIND GUSTS TO 25 KT
WILL BE POSSIBLE ON THURSDAY OVER THE OUTER WATERS AS A TROUGH
MOVES INLAND NORTH OF THE AREA. THIS COULD RESULT IN HAZARDOUS
CONDITIONS TO SMALL CRAFT. FORECAST CONFIDENCE IS MODERATE.
OTHERWISE...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
FRIDAY.

&&

.BEACHES...
A 4-5 FOOT/17 SECOND SOUTH SWELL IS BRINGING WIDESPREAD 4-6 FOOT
SURF TO ORANGE COUNTY BEACHES...AND SOME SAN DIEGO COUNTY
BEACHES... THIS AFTERNOON. SOME BEACHES IN ORANGE COUNTY HAVE
REPORTED 5-7 FOOT SURF AS WELL. THESE SURF CONDITIONS...ALONG WITH
A HIGH RISK OF STRONG RIP CURRENTS...WILL CONTINUE THIS
AFTERNOON...WITH THE SWELL AND SURF FALLING TONIGHT INTO TUESDAY.

WAVE WATCH 3 INDICATES AN 8 FOOT/11 SECOND WEST-NORTHWEST SWELL
MOVING IN ON WEDNESDAY...WITH A 10 FOOT/11 SECOND WEST-NORTHWEST
SWELL THEN OCCURRING ON THURSDAY. ALTHOUGH THE PERIOD ON THESE
SWELLS WILL BE SOMEWHAT SHORT...THE SWELL HEIGHTS WILL BE LARGE
ENOUGH TO BRING AT LEAST 4-6 FOOT SURF AND AN INCREASED RISK OF
RIP CURRENTS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...HARRISON




000
FXUS66 KSGX 301633
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
933 AM PDT MON MAR 30 2015

.SYNOPSIS...
A FEW UPPER-LEVEL TROUGHS MOVING BY TO OUR NORTH WILL HELP DEEPEN
THE MARINE LAYER...CREATE SLIGHTLY COOLER WEATHER AND DEVELOP
BREEZY WESTERLY WINDS IN THE MOUNTAINS AND DESERTS THROUGH MID
WEEK. WEAK OFFSHORE FLOW WILL CREATE WARMING AND PUSH THE MARINE
LAYER OFF THE COAST ON FRIDAY...WITH GUSTY NORTHEAST WINDS NEAR
THE COASTAL FOOTHILLS. NEXT WEEKEND...A LOW PRESSURE SYSTEM
DEVELOPING OVER THE EASTERN PACIFIC WILL DEVELOP SLIGHTLY COOLER
WEATHER...A RETURN OF THE MARINE LAYER...AND BREEZY WESTERLY WINDS
IN THE MOUNTAINS AND DESERTS..

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 30/0000 UTC ECMWF AND 30/0600 UTC GFS ARE IN RELATIVELY GOOD
AGREEMENT THROUGH THE END OF THE WORK WEEK.

AT 9 AM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 450 MILES S OF SAN DIEGO...AND A WEAK UPPER-LEVEL
RIDGE OFF THE COAST OF SW CA. VISIBLE SATELLITE SHOWED PATCHY LOW
CLOUDS OVER THE COASTAL WATERS...COAST AND WESTERN VALLEYS.
SURFACE OBSERVATIONS REPORTED PATCHY FOG OVER PORTIONS OF THE
COAST WITH HIGHER ELEVATIONS. HIGH TEMPERATURES TODAY WILL BE A
DEGREE OR TWO COOLER THAN YESTERDAY...WITH MOSTLY CLEAR SKIES THIS
AFTERNOON.

A FEW TROUGHS MOVING BY TO OUR NORTH THIS WEEK WILL LOWER HIGH
TEMPERATURES TO NEAR NORMAL BY THURSDAY...CREATE BREEZY WESTERLY
WINDS IN THE MOUNTAINS AND DESERTS...AND DEEPEN THE MARINE LAYER
THROUGH MID WEEK. ISOLATED WESTERLY WIND GUSTS TO 50 MPH WILL BE
POSSIBLE OVER THE MOUNTAINS AND DESERTS TUESDAY AND WEDNESDAY
NIGHTS. NIGHT AND MORNING LOW CLOUDS/FOG WILL PUSH INTO THE FAR
INLAND VALLEYS BY WEDNESDAY MORNING.

SURFACE HIGH PRESSURE BUILDING OVER THE GREAT BASIN AND SURFACE
LOW PRESSURE OFF THE COAST WILL CREATE WEAK OFFSHORE FLOW AND
SLIGHTLY WARMER WEATHER FOR THE COAST AND VALLEYS ON FRIDAY. AN
OFFSHORE SURFACE PRESSURE GRADIENT AROUND -14 MB FROM SAN DIEGO TO
SALT LAKE CITY WILL CREATE ISOLATED NORTHEASTERLY WIND GUSTS TO 45
MPH THROUGH AND BELOW MOUNTAIN PASSES AND CANYONS FRIDAY MORNING.
THESE WINDS WILL HELP TO PUSH THE MARINE LAYER CLOUDS OFF THE
COAST THURSDAY NIGHT. HIGH TEMPERATURES OVER MOST COASTAL AND
VALLEY AREAS WILL BE RISE INTO THE 80S...WITH 70S ALONG THE
IMMEDIATE COAST.

ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A TROUGH
APPROACHES FROM THE WEST...LOWERING HIGH TEMPERATURES TO SLIGHTLY
ABOVE NORMAL FOR THIS TIME OF YEAR AND REDEVELOPING THE MARINE
LAYER BY SUNDAY MORNING. BREEZY WESTERLY WINDS...WITH LOCAL GUSTS
NEAR 50 MPH...WILL BE POSSIBLE LATE SUNDAY INTO MONDAY OVER
PORTIONS OF THE MOUNTAINS AND DESERTS.

&&

.AVIATION...
301502Z...COAST/VALLEYS...STRATUS 15-20 SM INLAND...WITH BASES 700-
900 FT MSL...TOPS 1200-1400 FT MSL AND LOCAL VIS AOB 1 SM...WILL
CLEAR TO THE COASTAL WATERS THROUGH 1800 UTC. THERE IS A 6 DEGREE
MARINE LAYER INVERSION THIS MORNING. 1800-31/0100 UTC...MOSTLY
UNRESTRICTED VIS AND SKC. 31/0100-1500 UTC...STRATUS GRADUALLY
DEVELOPING 15-20 SM INLAND WITH SIMILAR BASES AND TOPS TO THIS
MORNING. LOCAL VIS AOB 1 SM WILL BE POSSIBLE AGAIN OVER HIGHER
COASTAL TERRAIN AND INLAND MESAS. FORECAST CONFIDENCE IS MODERATE.
STRATUS/FOG UNLIKELY TO MAKE IT INTO KONT.

DESERTS/MTNS...UNRESTRICTED VIS THROUGH TUESDAY MORNING.
SKC...BECOMING SCT CLOUDS AOA 20000 FT MSL AFTER 31/0600 UTC.

&&

.MARINE...
802 AM...STEEP SEAS WILL BE POSSIBLE ON THURSDAY DUE TO A SHORT-
PERIOD 10-11 FOOT WEST-NORTHWEST SWELL MOVING IN. THIS COULD RESULT
IN HAZARDOUS CONDITIONS TO SMALL CRAFT. OTHERWISE...NO HAZARDOUS
MARINE WEATHER IS EXPECTED THROUGH FRIDAY.

&&

.BEACHES...
A 4-5 FOOT/17 SECOND SOUTH SWELL IS BRINGING WIDESPREAD 4-6 FOOT
SURF TO ORANGE COUNTY BEACHES...AND SOME SAN DIEGO COUNTY BEACHES...
THIS MORNING. SOME BEACHES IN ORANGE COUNTY HAVE REPORTED 5-7 FOOT
SURF AS WELL. THESE SURF CONDITIONS...ALONG WITH A HIGH RISK OF
STRONG RIP CURRENTS...WILL CONTINUE TODAY...WITH THE SWELL AND SURF
FALLING TONIGHT INTO TUESDAY.

WAVE WATCH 3 INDICATES AN 8 FOOT/11 SECOND WEST-NORTHWEST SWELL
MOVING IN ON WEDNESDAY...WITH A 10-11 FOOT/11 SECOND WEST-NORTHWEST
SWELL THEN OCCURRING ON THURSDAY. ALTHOUGH THE PERIOD ON THESE
SWELLS WILL BE SOMEWHAT SHORT...THE SWELL HEIGHTS WILL BE LARGE
ENOUGH TO BRING AT LEAST 4-6 FOOT SURF AND AN INCREASED RISK OF RIP
CURRENTS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...HARRISON




000
FXUS66 KSGX 301633
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
933 AM PDT MON MAR 30 2015

.SYNOPSIS...
A FEW UPPER-LEVEL TROUGHS MOVING BY TO OUR NORTH WILL HELP DEEPEN
THE MARINE LAYER...CREATE SLIGHTLY COOLER WEATHER AND DEVELOP
BREEZY WESTERLY WINDS IN THE MOUNTAINS AND DESERTS THROUGH MID
WEEK. WEAK OFFSHORE FLOW WILL CREATE WARMING AND PUSH THE MARINE
LAYER OFF THE COAST ON FRIDAY...WITH GUSTY NORTHEAST WINDS NEAR
THE COASTAL FOOTHILLS. NEXT WEEKEND...A LOW PRESSURE SYSTEM
DEVELOPING OVER THE EASTERN PACIFIC WILL DEVELOP SLIGHTLY COOLER
WEATHER...A RETURN OF THE MARINE LAYER...AND BREEZY WESTERLY WINDS
IN THE MOUNTAINS AND DESERTS..

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 30/0000 UTC ECMWF AND 30/0600 UTC GFS ARE IN RELATIVELY GOOD
AGREEMENT THROUGH THE END OF THE WORK WEEK.

AT 9 AM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 450 MILES S OF SAN DIEGO...AND A WEAK UPPER-LEVEL
RIDGE OFF THE COAST OF SW CA. VISIBLE SATELLITE SHOWED PATCHY LOW
CLOUDS OVER THE COASTAL WATERS...COAST AND WESTERN VALLEYS.
SURFACE OBSERVATIONS REPORTED PATCHY FOG OVER PORTIONS OF THE
COAST WITH HIGHER ELEVATIONS. HIGH TEMPERATURES TODAY WILL BE A
DEGREE OR TWO COOLER THAN YESTERDAY...WITH MOSTLY CLEAR SKIES THIS
AFTERNOON.

A FEW TROUGHS MOVING BY TO OUR NORTH THIS WEEK WILL LOWER HIGH
TEMPERATURES TO NEAR NORMAL BY THURSDAY...CREATE BREEZY WESTERLY
WINDS IN THE MOUNTAINS AND DESERTS...AND DEEPEN THE MARINE LAYER
THROUGH MID WEEK. ISOLATED WESTERLY WIND GUSTS TO 50 MPH WILL BE
POSSIBLE OVER THE MOUNTAINS AND DESERTS TUESDAY AND WEDNESDAY
NIGHTS. NIGHT AND MORNING LOW CLOUDS/FOG WILL PUSH INTO THE FAR
INLAND VALLEYS BY WEDNESDAY MORNING.

SURFACE HIGH PRESSURE BUILDING OVER THE GREAT BASIN AND SURFACE
LOW PRESSURE OFF THE COAST WILL CREATE WEAK OFFSHORE FLOW AND
SLIGHTLY WARMER WEATHER FOR THE COAST AND VALLEYS ON FRIDAY. AN
OFFSHORE SURFACE PRESSURE GRADIENT AROUND -14 MB FROM SAN DIEGO TO
SALT LAKE CITY WILL CREATE ISOLATED NORTHEASTERLY WIND GUSTS TO 45
MPH THROUGH AND BELOW MOUNTAIN PASSES AND CANYONS FRIDAY MORNING.
THESE WINDS WILL HELP TO PUSH THE MARINE LAYER CLOUDS OFF THE
COAST THURSDAY NIGHT. HIGH TEMPERATURES OVER MOST COASTAL AND
VALLEY AREAS WILL BE RISE INTO THE 80S...WITH 70S ALONG THE
IMMEDIATE COAST.

ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A TROUGH
APPROACHES FROM THE WEST...LOWERING HIGH TEMPERATURES TO SLIGHTLY
ABOVE NORMAL FOR THIS TIME OF YEAR AND REDEVELOPING THE MARINE
LAYER BY SUNDAY MORNING. BREEZY WESTERLY WINDS...WITH LOCAL GUSTS
NEAR 50 MPH...WILL BE POSSIBLE LATE SUNDAY INTO MONDAY OVER
PORTIONS OF THE MOUNTAINS AND DESERTS.

&&

.AVIATION...
301502Z...COAST/VALLEYS...STRATUS 15-20 SM INLAND...WITH BASES 700-
900 FT MSL...TOPS 1200-1400 FT MSL AND LOCAL VIS AOB 1 SM...WILL
CLEAR TO THE COASTAL WATERS THROUGH 1800 UTC. THERE IS A 6 DEGREE
MARINE LAYER INVERSION THIS MORNING. 1800-31/0100 UTC...MOSTLY
UNRESTRICTED VIS AND SKC. 31/0100-1500 UTC...STRATUS GRADUALLY
DEVELOPING 15-20 SM INLAND WITH SIMILAR BASES AND TOPS TO THIS
MORNING. LOCAL VIS AOB 1 SM WILL BE POSSIBLE AGAIN OVER HIGHER
COASTAL TERRAIN AND INLAND MESAS. FORECAST CONFIDENCE IS MODERATE.
STRATUS/FOG UNLIKELY TO MAKE IT INTO KONT.

DESERTS/MTNS...UNRESTRICTED VIS THROUGH TUESDAY MORNING.
SKC...BECOMING SCT CLOUDS AOA 20000 FT MSL AFTER 31/0600 UTC.

&&

.MARINE...
802 AM...STEEP SEAS WILL BE POSSIBLE ON THURSDAY DUE TO A SHORT-
PERIOD 10-11 FOOT WEST-NORTHWEST SWELL MOVING IN. THIS COULD RESULT
IN HAZARDOUS CONDITIONS TO SMALL CRAFT. OTHERWISE...NO HAZARDOUS
MARINE WEATHER IS EXPECTED THROUGH FRIDAY.

&&

.BEACHES...
A 4-5 FOOT/17 SECOND SOUTH SWELL IS BRINGING WIDESPREAD 4-6 FOOT
SURF TO ORANGE COUNTY BEACHES...AND SOME SAN DIEGO COUNTY BEACHES...
THIS MORNING. SOME BEACHES IN ORANGE COUNTY HAVE REPORTED 5-7 FOOT
SURF AS WELL. THESE SURF CONDITIONS...ALONG WITH A HIGH RISK OF
STRONG RIP CURRENTS...WILL CONTINUE TODAY...WITH THE SWELL AND SURF
FALLING TONIGHT INTO TUESDAY.

WAVE WATCH 3 INDICATES AN 8 FOOT/11 SECOND WEST-NORTHWEST SWELL
MOVING IN ON WEDNESDAY...WITH A 10-11 FOOT/11 SECOND WEST-NORTHWEST
SWELL THEN OCCURRING ON THURSDAY. ALTHOUGH THE PERIOD ON THESE
SWELLS WILL BE SOMEWHAT SHORT...THE SWELL HEIGHTS WILL BE LARGE
ENOUGH TO BRING AT LEAST 4-6 FOOT SURF AND AN INCREASED RISK OF RIP
CURRENTS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...HARRISON





000
FXUS66 KSGX 301008
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PDT MON MAR 30 2015

.SYNOPSIS...

A LOW PRESSURE SYSTEM MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND LOW PRESSURE SYSTEM MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW INTO THURSDAY WITH NIGHT
AND MORNING COASTAL LOW CLOUDS AND FOG...INLAND COOLING...AND GUSTY
WEST WINDS IN THE MOUNTAINS AND DESERTS. OFFSHORE FLOW AND HIGH
PRESSURE ALOFT WILL BRING WARMING ON FRIDAY WITH GUSTY NORTHEAST
WINDS NEAR THE COASTAL FOOTHILL. FOR NEXT WEEKEND...A LOW PRESSURE
SYSTEM DEVELOPING OVER THE EASTERN PACIFIC WILL BRING A COOLING
TREND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND TROUGH OF LOW PRESSURE MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW WITH AN INLAND COOLING
TREND INTO WEDNESDAY OR THURSDAY. THE STRONGER ONSHORE FLOW WILL
BRING PERIODS OF GUSTY WEST WINDS TO THE MOUNTAINS AND DESERTS.
WINDS ARE MOSTLY EXPECTED TO REMAIN BELOW ADVISORY STRENGTH...BUT
COULD APPROACH ADVISORY STRENGTH WEDNESDAY NIGHT ON THE DESERT
SLOPES OF THE NORTH/SOUTH MOUNTAIN RANGES INTO THE ADJACENT DESERT
AREAS.

RECENT AIRCRAFT SOUNDINGS SHOW THE DEPTH OF THE MARINE LAYER AROUND
1200 FEET WITH SATELLITE IMAGERY SHOWING MORE EXTENSIVE STRATUS OVER
THE COASTAL WATERS EXTENDING LOCALLY INLAND ACROSS THE ORANGE COUNTY
COASTAL PLAIN AND INLAND IN SAN DIEGO COUNTY AS FAR THE FAR WESTERN
VALLEYS. FOG COULD BRIEFLY BE LOCALLY DENSE NEAR THE MESAS AND OTHER
HIGHER COASTAL TERRAIN. THE STRONGER ONSHORE FLOW...WEAK NIGHT AND
MORNING COASTAL EDDIES...AND SLOW LOWERING OF HEIGHTS ALOFT FROM THE
PAIR OF WEST COAST TROUGH PASSAGES IS EXPECTED TO RESULT IN GRADUAL
DEEPENING OF THE MARINE LAYER INTO WEDNESDAY WITH NIGHT AND MORNING
COASTAL LOW CLOUDS AND FOG EXTENDING INLAND INTO PORTIONS OF THE
WESTERN VALLEYS TONIGHT INTO TUESDAY MORNING...AND INTO PORTIONS OF
THE INLAND VALLEYS FOR TUESDAY NIGHT INTO WEDNESDAY MORNING.

FOR FRIDAY...HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING
WARMING WITH GUSTY NORTHEAST WINDS NEAR THE COASTAL FOOTHILLS.
GRADUALLY COOLER FOR NEXT WEEKEND AS A TROUGH OF LOW PRESSURE
DEVELOPS OVER THE EASTERN PACIFIC.

&&

.AVIATION...

300900Z...LOW CLOUDS BASED AT AROUND 1000 FEET MSL WILL CONTINUE TO
COVER COASTAL AREAS THROUGH SUNRISE WITH ISOLATED VIS REDUCTION
BELOW 1SM MAINLY ALONG INLAND EXTENT OF CLOUDS. SCATTER OUT IS
EXPECTED BY 16Z THIS MORNING. LOW CLOUDS WILL SPREAD INTO COASTAL
AREAS AFTER 04Z TONIGHT WITH BASES AROUND 1200 FEET MSL.
OTHERWISE...MOSTLY CLEAR AND VFR CONDITIONS TODAY AND TONIGHT.

&&

.MARINE...

200 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH FRIDAY.


&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE...MM




000
FXUS66 KSGX 301008
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PDT MON MAR 30 2015

.SYNOPSIS...

A LOW PRESSURE SYSTEM MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND LOW PRESSURE SYSTEM MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW INTO THURSDAY WITH NIGHT
AND MORNING COASTAL LOW CLOUDS AND FOG...INLAND COOLING...AND GUSTY
WEST WINDS IN THE MOUNTAINS AND DESERTS. OFFSHORE FLOW AND HIGH
PRESSURE ALOFT WILL BRING WARMING ON FRIDAY WITH GUSTY NORTHEAST
WINDS NEAR THE COASTAL FOOTHILL. FOR NEXT WEEKEND...A LOW PRESSURE
SYSTEM DEVELOPING OVER THE EASTERN PACIFIC WILL BRING A COOLING
TREND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND TROUGH OF LOW PRESSURE MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW WITH AN INLAND COOLING
TREND INTO WEDNESDAY OR THURSDAY. THE STRONGER ONSHORE FLOW WILL
BRING PERIODS OF GUSTY WEST WINDS TO THE MOUNTAINS AND DESERTS.
WINDS ARE MOSTLY EXPECTED TO REMAIN BELOW ADVISORY STRENGTH...BUT
COULD APPROACH ADVISORY STRENGTH WEDNESDAY NIGHT ON THE DESERT
SLOPES OF THE NORTH/SOUTH MOUNTAIN RANGES INTO THE ADJACENT DESERT
AREAS.

RECENT AIRCRAFT SOUNDINGS SHOW THE DEPTH OF THE MARINE LAYER AROUND
1200 FEET WITH SATELLITE IMAGERY SHOWING MORE EXTENSIVE STRATUS OVER
THE COASTAL WATERS EXTENDING LOCALLY INLAND ACROSS THE ORANGE COUNTY
COASTAL PLAIN AND INLAND IN SAN DIEGO COUNTY AS FAR THE FAR WESTERN
VALLEYS. FOG COULD BRIEFLY BE LOCALLY DENSE NEAR THE MESAS AND OTHER
HIGHER COASTAL TERRAIN. THE STRONGER ONSHORE FLOW...WEAK NIGHT AND
MORNING COASTAL EDDIES...AND SLOW LOWERING OF HEIGHTS ALOFT FROM THE
PAIR OF WEST COAST TROUGH PASSAGES IS EXPECTED TO RESULT IN GRADUAL
DEEPENING OF THE MARINE LAYER INTO WEDNESDAY WITH NIGHT AND MORNING
COASTAL LOW CLOUDS AND FOG EXTENDING INLAND INTO PORTIONS OF THE
WESTERN VALLEYS TONIGHT INTO TUESDAY MORNING...AND INTO PORTIONS OF
THE INLAND VALLEYS FOR TUESDAY NIGHT INTO WEDNESDAY MORNING.

FOR FRIDAY...HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING
WARMING WITH GUSTY NORTHEAST WINDS NEAR THE COASTAL FOOTHILLS.
GRADUALLY COOLER FOR NEXT WEEKEND AS A TROUGH OF LOW PRESSURE
DEVELOPS OVER THE EASTERN PACIFIC.

&&

.AVIATION...

300900Z...LOW CLOUDS BASED AT AROUND 1000 FEET MSL WILL CONTINUE TO
COVER COASTAL AREAS THROUGH SUNRISE WITH ISOLATED VIS REDUCTION
BELOW 1SM MAINLY ALONG INLAND EXTENT OF CLOUDS. SCATTER OUT IS
EXPECTED BY 16Z THIS MORNING. LOW CLOUDS WILL SPREAD INTO COASTAL
AREAS AFTER 04Z TONIGHT WITH BASES AROUND 1200 FEET MSL.
OTHERWISE...MOSTLY CLEAR AND VFR CONDITIONS TODAY AND TONIGHT.

&&

.MARINE...

200 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH FRIDAY.


&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE...MM





000
FXUS66 KSGX 301008
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PDT MON MAR 30 2015

.SYNOPSIS...

A LOW PRESSURE SYSTEM MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND LOW PRESSURE SYSTEM MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW INTO THURSDAY WITH NIGHT
AND MORNING COASTAL LOW CLOUDS AND FOG...INLAND COOLING...AND GUSTY
WEST WINDS IN THE MOUNTAINS AND DESERTS. OFFSHORE FLOW AND HIGH
PRESSURE ALOFT WILL BRING WARMING ON FRIDAY WITH GUSTY NORTHEAST
WINDS NEAR THE COASTAL FOOTHILL. FOR NEXT WEEKEND...A LOW PRESSURE
SYSTEM DEVELOPING OVER THE EASTERN PACIFIC WILL BRING A COOLING
TREND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND TROUGH OF LOW PRESSURE MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW WITH AN INLAND COOLING
TREND INTO WEDNESDAY OR THURSDAY. THE STRONGER ONSHORE FLOW WILL
BRING PERIODS OF GUSTY WEST WINDS TO THE MOUNTAINS AND DESERTS.
WINDS ARE MOSTLY EXPECTED TO REMAIN BELOW ADVISORY STRENGTH...BUT
COULD APPROACH ADVISORY STRENGTH WEDNESDAY NIGHT ON THE DESERT
SLOPES OF THE NORTH/SOUTH MOUNTAIN RANGES INTO THE ADJACENT DESERT
AREAS.

RECENT AIRCRAFT SOUNDINGS SHOW THE DEPTH OF THE MARINE LAYER AROUND
1200 FEET WITH SATELLITE IMAGERY SHOWING MORE EXTENSIVE STRATUS OVER
THE COASTAL WATERS EXTENDING LOCALLY INLAND ACROSS THE ORANGE COUNTY
COASTAL PLAIN AND INLAND IN SAN DIEGO COUNTY AS FAR THE FAR WESTERN
VALLEYS. FOG COULD BRIEFLY BE LOCALLY DENSE NEAR THE MESAS AND OTHER
HIGHER COASTAL TERRAIN. THE STRONGER ONSHORE FLOW...WEAK NIGHT AND
MORNING COASTAL EDDIES...AND SLOW LOWERING OF HEIGHTS ALOFT FROM THE
PAIR OF WEST COAST TROUGH PASSAGES IS EXPECTED TO RESULT IN GRADUAL
DEEPENING OF THE MARINE LAYER INTO WEDNESDAY WITH NIGHT AND MORNING
COASTAL LOW CLOUDS AND FOG EXTENDING INLAND INTO PORTIONS OF THE
WESTERN VALLEYS TONIGHT INTO TUESDAY MORNING...AND INTO PORTIONS OF
THE INLAND VALLEYS FOR TUESDAY NIGHT INTO WEDNESDAY MORNING.

FOR FRIDAY...HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING
WARMING WITH GUSTY NORTHEAST WINDS NEAR THE COASTAL FOOTHILLS.
GRADUALLY COOLER FOR NEXT WEEKEND AS A TROUGH OF LOW PRESSURE
DEVELOPS OVER THE EASTERN PACIFIC.

&&

.AVIATION...

300900Z...LOW CLOUDS BASED AT AROUND 1000 FEET MSL WILL CONTINUE TO
COVER COASTAL AREAS THROUGH SUNRISE WITH ISOLATED VIS REDUCTION
BELOW 1SM MAINLY ALONG INLAND EXTENT OF CLOUDS. SCATTER OUT IS
EXPECTED BY 16Z THIS MORNING. LOW CLOUDS WILL SPREAD INTO COASTAL
AREAS AFTER 04Z TONIGHT WITH BASES AROUND 1200 FEET MSL.
OTHERWISE...MOSTLY CLEAR AND VFR CONDITIONS TODAY AND TONIGHT.

&&

.MARINE...

200 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH FRIDAY.


&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE...MM




000
FXUS66 KSGX 301008
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PDT MON MAR 30 2015

.SYNOPSIS...

A LOW PRESSURE SYSTEM MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND LOW PRESSURE SYSTEM MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW INTO THURSDAY WITH NIGHT
AND MORNING COASTAL LOW CLOUDS AND FOG...INLAND COOLING...AND GUSTY
WEST WINDS IN THE MOUNTAINS AND DESERTS. OFFSHORE FLOW AND HIGH
PRESSURE ALOFT WILL BRING WARMING ON FRIDAY WITH GUSTY NORTHEAST
WINDS NEAR THE COASTAL FOOTHILL. FOR NEXT WEEKEND...A LOW PRESSURE
SYSTEM DEVELOPING OVER THE EASTERN PACIFIC WILL BRING A COOLING
TREND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH ON TUESDAY AND A
SECOND TROUGH OF LOW PRESSURE MOVING INLAND THROUGH CALIFORNIA ON
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW WITH AN INLAND COOLING
TREND INTO WEDNESDAY OR THURSDAY. THE STRONGER ONSHORE FLOW WILL
BRING PERIODS OF GUSTY WEST WINDS TO THE MOUNTAINS AND DESERTS.
WINDS ARE MOSTLY EXPECTED TO REMAIN BELOW ADVISORY STRENGTH...BUT
COULD APPROACH ADVISORY STRENGTH WEDNESDAY NIGHT ON THE DESERT
SLOPES OF THE NORTH/SOUTH MOUNTAIN RANGES INTO THE ADJACENT DESERT
AREAS.

RECENT AIRCRAFT SOUNDINGS SHOW THE DEPTH OF THE MARINE LAYER AROUND
1200 FEET WITH SATELLITE IMAGERY SHOWING MORE EXTENSIVE STRATUS OVER
THE COASTAL WATERS EXTENDING LOCALLY INLAND ACROSS THE ORANGE COUNTY
COASTAL PLAIN AND INLAND IN SAN DIEGO COUNTY AS FAR THE FAR WESTERN
VALLEYS. FOG COULD BRIEFLY BE LOCALLY DENSE NEAR THE MESAS AND OTHER
HIGHER COASTAL TERRAIN. THE STRONGER ONSHORE FLOW...WEAK NIGHT AND
MORNING COASTAL EDDIES...AND SLOW LOWERING OF HEIGHTS ALOFT FROM THE
PAIR OF WEST COAST TROUGH PASSAGES IS EXPECTED TO RESULT IN GRADUAL
DEEPENING OF THE MARINE LAYER INTO WEDNESDAY WITH NIGHT AND MORNING
COASTAL LOW CLOUDS AND FOG EXTENDING INLAND INTO PORTIONS OF THE
WESTERN VALLEYS TONIGHT INTO TUESDAY MORNING...AND INTO PORTIONS OF
THE INLAND VALLEYS FOR TUESDAY NIGHT INTO WEDNESDAY MORNING.

FOR FRIDAY...HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING
WARMING WITH GUSTY NORTHEAST WINDS NEAR THE COASTAL FOOTHILLS.
GRADUALLY COOLER FOR NEXT WEEKEND AS A TROUGH OF LOW PRESSURE
DEVELOPS OVER THE EASTERN PACIFIC.

&&

.AVIATION...

300900Z...LOW CLOUDS BASED AT AROUND 1000 FEET MSL WILL CONTINUE TO
COVER COASTAL AREAS THROUGH SUNRISE WITH ISOLATED VIS REDUCTION
BELOW 1SM MAINLY ALONG INLAND EXTENT OF CLOUDS. SCATTER OUT IS
EXPECTED BY 16Z THIS MORNING. LOW CLOUDS WILL SPREAD INTO COASTAL
AREAS AFTER 04Z TONIGHT WITH BASES AROUND 1200 FEET MSL.
OTHERWISE...MOSTLY CLEAR AND VFR CONDITIONS TODAY AND TONIGHT.

&&

.MARINE...

200 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH FRIDAY.


&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE...MM





000
FXUS66 KSGX 300333
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
832 PM PDT SUN MAR 29 2015

.SYNOPSIS...HIGH PRESSURE ALOFT OVER THE WEST WILL WEAKEN THROUGH
THURSDAY RESULTING IN A SLOW COOLING TREND. AREAS OF NIGHT AND
MORNING LOW CLOUDS AND FOG WILL CONTINUE ALONG THE COAST...AND MAY
SPREAD FARTHER INLAND BY THURSDAY AS GUSTY ONSHORE FLOW DEVELOPS
OVER THE MOUNTAINS AND DESERTS. FAIR AND WARMER AGAIN LATE IN THE
WEEK WITH WEAK OFFSHORE FLOW...THEN MUCH COOLER BEGINNING LATE IN
THE WEEKEND AS A COLD TROUGH DROPS SOUTH ALONG THE WEST COAST...
ACCOMPANIED BY A DEEPER MARINE LAYER AND GUSTY WESTERLY WINDS ACROSS
THE MOUNTAINS AND DESERTS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AS WAS THE CASE YESTERDAY EVENING...HIGH CLOUDS HAVE THICKENED
ACROSS THE REGION OBSCURING THE LOWER CLOUDS. HOWEVER...WHERE
VISIBLE...LOWER CLOUDS WERE EVIDENT OVER THE CA BIGHT AND FARTHER
OFFSHORE. THE 00Z MIRAMAR SOUNDING HAD A WEAK INVERSION BASED NEAR
1500 FT. THE SURFACE PRESSURE GRADIENTS WERE ALMOST NEUTRAL FROM
NV...BUT HAD INCREASED ONSHORE TO 4-6 MBS TO THE LOWER DESERTS.
WINDS WERE GENERALLY LIGHT.

BASED ON THE HEIGHT OF THE MOIST LAYER...AND DECREASED DEWPOINT
DEPRESSIONS...IT IS LIKELY SOME PATCHY RADIATIONAL FOG WILL DEVELOP
OVERNIGHT AS THE HIGHER CLOUDS BREAK...BUT DIFFICULT TO PINPOINT
EXACT LOCATIONS.

BROAD RIDGING ALOFT WILL CONTINUE OVER THE WEST THROUGH MON...THEN
FLATTEN AS A SERIES OF SHORT WAVES SLIDE EAST OFF THE PACIFIC. THIS
WILL SUPPRESS HEIGHTS/THICKNESS OVER CA THROUGH THU...AND CONTINUE
ONSHORE FLOW AND A MARINE LAYER WEST OF THE MTS. WINDS WILL BECOME
GUSTY OVER THE MTS/DESERTS AS THE TROUGHS PASS BY TO THE NORTH...AND
DAYTIME TEMPERATURES WILL GRADUALLY LOWER INLAND.

FOR FRIDAY...RIDGING WILL FOLLOW...SWINGING SFC WINDS BACK OFFSHORE
ACROSS SOCAL AS HIGH PRESSURE BUILDS INTO THE GREAT BASIN. DEPENDING
ON THE STRENGTH OF THE OFFSHORE PUSH...DAYTIME TEMPERATURES COULD
CLIMB BACK UP TO NEAR 80 ALONG THE COAST BEFORE WINDS TURN BACK
ONSHORE SAT AFTERNOON.

MORE SIGNIFICANT CHANGES MAY BE IN THE OFFING LATE NEXT WEEKEND
THROUGH THE FOLLOWING WEEK AS A COLDER TROUGH SETTLES OVER THE WEST
COAST. SEVERAL OF THE EC/GFS DETERMINISTIC RUNS HAVE SUGGESTED A
FLIP-FLOP OF THE PERSISTENT WEST COAST RIDGE/EAST COAST TROUGH
PATTERN FOR THE WEEK OF APRIL 5. THE LATEST AVAILABLE RUNS ALSO HAVE
PRECIP OVER SOCAL CENTERED AROUND APRIL 8. SO...PERHAPS WE WILL HAVE
A CHANCE OF MORE PRECIPITATION BEFORE THE SEASON SHUTS DOWN
COMPLETELY.

&&

.AVIATION... 300300Z...COASTAL AREAS...PATCHES OF LOW CLOUDS ARE
BEGINNING TO RETURN TO THE IMMEDIATE COAST AT THIS TIME. THEY WILL
LIKELY IMPACT THE COASTAL TAF SITES AFT 05Z WITH BKN-OVC CIGS
BETWEEN 900 AND 1200 FT MSL AND TOPS TO 1500 FT. EXPECT REDUCED VIS
IN AREAS WHERE CLOUDS AND TERRAIN INTERSECT...MAINLY ALONG THE
COASTAL MESAS. LOW CLOUDS AND FOG WILL LIKELY CLEAR BY 16Z MON.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...

800 PM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...SLIGHTLY ELEVATED SURF WILL CONTINUE THROUGH THE FIRST HALF
OF THIS WEEK THOUGH THE RIP CURRENT THREAT WILL GRADUALLY DIMINISH
AS THE SWELL PERIOD DECREASES.

&&

.SKYWARN... SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER
SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE

PZ...NONE.
&&

$$

PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG





000
FXUS66 KSGX 300333
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
832 PM PDT SUN MAR 29 2015

.SYNOPSIS...HIGH PRESSURE ALOFT OVER THE WEST WILL WEAKEN THROUGH
THURSDAY RESULTING IN A SLOW COOLING TREND. AREAS OF NIGHT AND
MORNING LOW CLOUDS AND FOG WILL CONTINUE ALONG THE COAST...AND MAY
SPREAD FARTHER INLAND BY THURSDAY AS GUSTY ONSHORE FLOW DEVELOPS
OVER THE MOUNTAINS AND DESERTS. FAIR AND WARMER AGAIN LATE IN THE
WEEK WITH WEAK OFFSHORE FLOW...THEN MUCH COOLER BEGINNING LATE IN
THE WEEKEND AS A COLD TROUGH DROPS SOUTH ALONG THE WEST COAST...
ACCOMPANIED BY A DEEPER MARINE LAYER AND GUSTY WESTERLY WINDS ACROSS
THE MOUNTAINS AND DESERTS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AS WAS THE CASE YESTERDAY EVENING...HIGH CLOUDS HAVE THICKENED
ACROSS THE REGION OBSCURING THE LOWER CLOUDS. HOWEVER...WHERE
VISIBLE...LOWER CLOUDS WERE EVIDENT OVER THE CA BIGHT AND FARTHER
OFFSHORE. THE 00Z MIRAMAR SOUNDING HAD A WEAK INVERSION BASED NEAR
1500 FT. THE SURFACE PRESSURE GRADIENTS WERE ALMOST NEUTRAL FROM
NV...BUT HAD INCREASED ONSHORE TO 4-6 MBS TO THE LOWER DESERTS.
WINDS WERE GENERALLY LIGHT.

BASED ON THE HEIGHT OF THE MOIST LAYER...AND DECREASED DEWPOINT
DEPRESSIONS...IT IS LIKELY SOME PATCHY RADIATIONAL FOG WILL DEVELOP
OVERNIGHT AS THE HIGHER CLOUDS BREAK...BUT DIFFICULT TO PINPOINT
EXACT LOCATIONS.

BROAD RIDGING ALOFT WILL CONTINUE OVER THE WEST THROUGH MON...THEN
FLATTEN AS A SERIES OF SHORT WAVES SLIDE EAST OFF THE PACIFIC. THIS
WILL SUPPRESS HEIGHTS/THICKNESS OVER CA THROUGH THU...AND CONTINUE
ONSHORE FLOW AND A MARINE LAYER WEST OF THE MTS. WINDS WILL BECOME
GUSTY OVER THE MTS/DESERTS AS THE TROUGHS PASS BY TO THE NORTH...AND
DAYTIME TEMPERATURES WILL GRADUALLY LOWER INLAND.

FOR FRIDAY...RIDGING WILL FOLLOW...SWINGING SFC WINDS BACK OFFSHORE
ACROSS SOCAL AS HIGH PRESSURE BUILDS INTO THE GREAT BASIN. DEPENDING
ON THE STRENGTH OF THE OFFSHORE PUSH...DAYTIME TEMPERATURES COULD
CLIMB BACK UP TO NEAR 80 ALONG THE COAST BEFORE WINDS TURN BACK
ONSHORE SAT AFTERNOON.

MORE SIGNIFICANT CHANGES MAY BE IN THE OFFING LATE NEXT WEEKEND
THROUGH THE FOLLOWING WEEK AS A COLDER TROUGH SETTLES OVER THE WEST
COAST. SEVERAL OF THE EC/GFS DETERMINISTIC RUNS HAVE SUGGESTED A
FLIP-FLOP OF THE PERSISTENT WEST COAST RIDGE/EAST COAST TROUGH
PATTERN FOR THE WEEK OF APRIL 5. THE LATEST AVAILABLE RUNS ALSO HAVE
PRECIP OVER SOCAL CENTERED AROUND APRIL 8. SO...PERHAPS WE WILL HAVE
A CHANCE OF MORE PRECIPITATION BEFORE THE SEASON SHUTS DOWN
COMPLETELY.

&&

.AVIATION... 300300Z...COASTAL AREAS...PATCHES OF LOW CLOUDS ARE
BEGINNING TO RETURN TO THE IMMEDIATE COAST AT THIS TIME. THEY WILL
LIKELY IMPACT THE COASTAL TAF SITES AFT 05Z WITH BKN-OVC CIGS
BETWEEN 900 AND 1200 FT MSL AND TOPS TO 1500 FT. EXPECT REDUCED VIS
IN AREAS WHERE CLOUDS AND TERRAIN INTERSECT...MAINLY ALONG THE
COASTAL MESAS. LOW CLOUDS AND FOG WILL LIKELY CLEAR BY 16Z MON.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...

800 PM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...SLIGHTLY ELEVATED SURF WILL CONTINUE THROUGH THE FIRST HALF
OF THIS WEEK THOUGH THE RIP CURRENT THREAT WILL GRADUALLY DIMINISH
AS THE SWELL PERIOD DECREASES.

&&

.SKYWARN... SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER
SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE

PZ...NONE.
&&

$$

PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG




000
FXUS66 KSGX 292042
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT SUN MAR 29 2015

.SYNOPSIS...
SLOW COOLING THROUGH MID THIS WEEK...WITH HIGHS LOWERING TO NEAR
NORMAL BY THURSDAY. NIGHT AND MORNING LOW CLOUDS AND FOG WILL
CONTINUE ALONG THE COAST. SLIGHT COASTAL AND VALLEY WARMING
FRIDAY WITH WEAK OFFSHORE FLOW AND A SHALLOW MARINE LAYER...THEN
COOLING ACROSS THE REGION...A DEEPER MARINE LAYER AND BREEZY
WESTERLY WINDS IN THE MOUNTAINS AND DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE LONG-TERM.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY FROM OFFSHORE PRESSURE
GRADIENTS OF -12 MB FROM SAN DIEGO TO NORTHERN NEVADA WILL WARM
COASTAL AND VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND
LIMIT NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST.
ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH
APPROACHES FROM THE WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER
AND LOWERING HIGH TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS
TIME OF YEAR. BREEZY WESTERLY WINDS WILL BE POSSIBLE SATURDAY AND
SUNDAY OVER PORTIONS OF THE MOUNTAINS AND DESERTS...WITH LOCAL
GUSTS NEAR 55 MPH POSSIBLE SATURDAY NIGHT.

&&

.AVIATION...
292020Z...COASTAL AREAS...VFR CONDS WITH SCT HIGH
CLOUDS AOA 15000 FT MSL WILL PREVAIL THROUGH EARLY THIS EVENING. LOW
CLOUDS RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND
TOPS UP TO 1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS
INTERSECT TERRAIN IN THAT LAYER. STRATUS AND FOG SHOULD CLEAR 30/15-
16Z MONDAY MORNING.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...
120 PM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH VISIBILITY SHOULD REMAIN ABOVE 1 MILE. OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
130 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CONTINUE TO CREATE
STRONG RIP AND LONGSHORE CURRENTS THROUGH THIS EVENING...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH
HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL CONTINUE
THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT WILL
GRADUALLY DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23




000
FXUS66 KSGX 292042
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT SUN MAR 29 2015

.SYNOPSIS...
SLOW COOLING THROUGH MID THIS WEEK...WITH HIGHS LOWERING TO NEAR
NORMAL BY THURSDAY. NIGHT AND MORNING LOW CLOUDS AND FOG WILL
CONTINUE ALONG THE COAST. SLIGHT COASTAL AND VALLEY WARMING
FRIDAY WITH WEAK OFFSHORE FLOW AND A SHALLOW MARINE LAYER...THEN
COOLING ACROSS THE REGION...A DEEPER MARINE LAYER AND BREEZY
WESTERLY WINDS IN THE MOUNTAINS AND DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE LONG-TERM.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY FROM OFFSHORE PRESSURE
GRADIENTS OF -12 MB FROM SAN DIEGO TO NORTHERN NEVADA WILL WARM
COASTAL AND VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND
LIMIT NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST.
ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH
APPROACHES FROM THE WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER
AND LOWERING HIGH TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS
TIME OF YEAR. BREEZY WESTERLY WINDS WILL BE POSSIBLE SATURDAY AND
SUNDAY OVER PORTIONS OF THE MOUNTAINS AND DESERTS...WITH LOCAL
GUSTS NEAR 55 MPH POSSIBLE SATURDAY NIGHT.

&&

.AVIATION...
292020Z...COASTAL AREAS...VFR CONDS WITH SCT HIGH
CLOUDS AOA 15000 FT MSL WILL PREVAIL THROUGH EARLY THIS EVENING. LOW
CLOUDS RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND
TOPS UP TO 1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS
INTERSECT TERRAIN IN THAT LAYER. STRATUS AND FOG SHOULD CLEAR 30/15-
16Z MONDAY MORNING.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...
120 PM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH VISIBILITY SHOULD REMAIN ABOVE 1 MILE. OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
130 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CONTINUE TO CREATE
STRONG RIP AND LONGSHORE CURRENTS THROUGH THIS EVENING...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH
HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL CONTINUE
THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT WILL
GRADUALLY DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23





000
FXUS66 KSGX 292042
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT SUN MAR 29 2015

.SYNOPSIS...
SLOW COOLING THROUGH MID THIS WEEK...WITH HIGHS LOWERING TO NEAR
NORMAL BY THURSDAY. NIGHT AND MORNING LOW CLOUDS AND FOG WILL
CONTINUE ALONG THE COAST. SLIGHT COASTAL AND VALLEY WARMING
FRIDAY WITH WEAK OFFSHORE FLOW AND A SHALLOW MARINE LAYER...THEN
COOLING ACROSS THE REGION...A DEEPER MARINE LAYER AND BREEZY
WESTERLY WINDS IN THE MOUNTAINS AND DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE LONG-TERM.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY FROM OFFSHORE PRESSURE
GRADIENTS OF -12 MB FROM SAN DIEGO TO NORTHERN NEVADA WILL WARM
COASTAL AND VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND
LIMIT NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST.
ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH
APPROACHES FROM THE WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER
AND LOWERING HIGH TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS
TIME OF YEAR. BREEZY WESTERLY WINDS WILL BE POSSIBLE SATURDAY AND
SUNDAY OVER PORTIONS OF THE MOUNTAINS AND DESERTS...WITH LOCAL
GUSTS NEAR 55 MPH POSSIBLE SATURDAY NIGHT.

&&

.AVIATION...
292020Z...COASTAL AREAS...VFR CONDS WITH SCT HIGH
CLOUDS AOA 15000 FT MSL WILL PREVAIL THROUGH EARLY THIS EVENING. LOW
CLOUDS RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND
TOPS UP TO 1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS
INTERSECT TERRAIN IN THAT LAYER. STRATUS AND FOG SHOULD CLEAR 30/15-
16Z MONDAY MORNING.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...
120 PM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH VISIBILITY SHOULD REMAIN ABOVE 1 MILE. OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
130 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CONTINUE TO CREATE
STRONG RIP AND LONGSHORE CURRENTS THROUGH THIS EVENING...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH
HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL CONTINUE
THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT WILL
GRADUALLY DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23





000
FXUS66 KSGX 292042
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT SUN MAR 29 2015

.SYNOPSIS...
SLOW COOLING THROUGH MID THIS WEEK...WITH HIGHS LOWERING TO NEAR
NORMAL BY THURSDAY. NIGHT AND MORNING LOW CLOUDS AND FOG WILL
CONTINUE ALONG THE COAST. SLIGHT COASTAL AND VALLEY WARMING
FRIDAY WITH WEAK OFFSHORE FLOW AND A SHALLOW MARINE LAYER...THEN
COOLING ACROSS THE REGION...A DEEPER MARINE LAYER AND BREEZY
WESTERLY WINDS IN THE MOUNTAINS AND DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/1200 UTC ECMWF AND GFS ARE IN RELATIVELY GOOD AGREEMENT
THROUGH THE LONG-TERM.

AT 1 PM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY FROM OFFSHORE PRESSURE
GRADIENTS OF -12 MB FROM SAN DIEGO TO NORTHERN NEVADA WILL WARM
COASTAL AND VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND
LIMIT NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST.
ONSHORE FLOW WILL QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH
APPROACHES FROM THE WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER
AND LOWERING HIGH TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS
TIME OF YEAR. BREEZY WESTERLY WINDS WILL BE POSSIBLE SATURDAY AND
SUNDAY OVER PORTIONS OF THE MOUNTAINS AND DESERTS...WITH LOCAL
GUSTS NEAR 55 MPH POSSIBLE SATURDAY NIGHT.

&&

.AVIATION...
292020Z...COASTAL AREAS...VFR CONDS WITH SCT HIGH
CLOUDS AOA 15000 FT MSL WILL PREVAIL THROUGH EARLY THIS EVENING. LOW
CLOUDS RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND
TOPS UP TO 1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS
INTERSECT TERRAIN IN THAT LAYER. STRATUS AND FOG SHOULD CLEAR 30/15-
16Z MONDAY MORNING.

VALLEYS/MOUNTAINS/DESERTS...SCT-FEW CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH MONDAY.

&&

.MARINE...
120 PM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH VISIBILITY SHOULD REMAIN ABOVE 1 MILE. OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
130 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CONTINUE TO CREATE
STRONG RIP AND LONGSHORE CURRENTS THROUGH THIS EVENING...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH
HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL CONTINUE
THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT WILL
GRADUALLY DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23




000
FXUS66 KSGX 291640
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
940 AM PDT SUN MAR 29 2015

.SYNOPSIS...
SLIGHTLY COOLER TODAY AS A WEAK TROUGH MOVES ACROSS THE AREA.
GREATER COOLING TUESDAY THROUGH THURSDAY...WITH HIGHS NEAR NORMAL
AND NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST. SLIGHT
COASTAL AND VALLEY WARMING FRIDAY WITH WEAK OFFSHORE FLOW AND A
SHALLOW MARINE LAYER...THEN COOLING ACROSS THE REGION...A DEEPER
MARINE LAYER AND BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/0000 UTC ECMWF AND 29/0600 UTC GFS ARE IN RELATIVELY GOOD
AGREEMENT THROUGH THE LONG-TERM.

AT 9 AM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION...AND LOW CLOUDS OVER THE
COASTAL WATERS. SURFACE OBSERVATIONS REPORTED IMPROVED VISIBILITY
ACROSS MOST AREAS AS FOG LIFTS. HIGH TEMPERATURES TODAY WILL BE
SLIGHTLY COOLER THAN YESTERDAY AS ONSHORE FLOW INCREASES AND
HEIGHTS LOWER WITH THE APPROACHING WEAK TROUGH. HIGHS WILL BE
AROUND 5 TO 15 DEGREES F ABOVE NORMAL FOR THIS TIME OF YEAR.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY WILL WARM COASTAL AND
VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND LIMIT NIGHT AND
MORNING LOW CLOUDS AND FOG ALONG THE COAST. ONSHORE FLOW WILL
QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH APPROACHES FROM THE
WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER AND LOWERING HIGH
TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS TIME OF YEAR.
BREEZY WESTERLY WINDS...WITH LOCAL GUSTS NEAR 55 MPH...WILL BE
POSSIBLE SATURDAY AND SUNDAY OVER PORTIONS OF THE MOUNTAINS AND
DESERTS.

&&

.AVIATION...
291530Z...COASTAL AREAS...PATCHY FOG AND LOW CLOUDS WILL CONTINUE TO
DISSIPATE THROUGH 29/1630Z. VFR CONDS WITH SCT-BKN HIGH CLOUDS AOA
15000 FT MSL WILL PREVAIL THROUGH THIS AFTERNOON. LOW CLOUDS
RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND TOPS UP TO
1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS INTERSECT TERRAIN
IN THAT LAYER.

VALLEYS/MOUNTAINS/DESERTS...SCT-BKN CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH THIS EVENING.

&&

.MARINE...
830 AM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH NOT LIKELY TO BE DENSE. OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
830 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP
AND LONGSHORE CURRENTS THROUGH THIS AFTERNOON...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE
BEACH HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL
CONTINUE THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT
WILL DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23





000
FXUS66 KSGX 291640
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
940 AM PDT SUN MAR 29 2015

.SYNOPSIS...
SLIGHTLY COOLER TODAY AS A WEAK TROUGH MOVES ACROSS THE AREA.
GREATER COOLING TUESDAY THROUGH THURSDAY...WITH HIGHS NEAR NORMAL
AND NIGHT AND MORNING LOW CLOUDS AND FOG ALONG THE COAST. SLIGHT
COASTAL AND VALLEY WARMING FRIDAY WITH WEAK OFFSHORE FLOW AND A
SHALLOW MARINE LAYER...THEN COOLING ACROSS THE REGION...A DEEPER
MARINE LAYER AND BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS NEXT WEEKEND.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THE 29/0000 UTC ECMWF AND 29/0600 UTC GFS ARE IN RELATIVELY GOOD
AGREEMENT THROUGH THE LONG-TERM.

AT 9 AM PDT...WATER VAPOR SATELLITE IMAGERY DISPLAYED AN UPPER-
LEVEL LOW AROUND 500 MILES SW OF SAN DIEGO...AND A WEAK SHORTWAVE
TROUGH MOVING ACROSS CENTRAL CA. VISIBLE SATELLITE SHOWED MID/HIGH
LEVEL CLOUDS STREAMING OVER THE REGION...AND LOW CLOUDS OVER THE
COASTAL WATERS. SURFACE OBSERVATIONS REPORTED IMPROVED VISIBILITY
ACROSS MOST AREAS AS FOG LIFTS. HIGH TEMPERATURES TODAY WILL BE
SLIGHTLY COOLER THAN YESTERDAY AS ONSHORE FLOW INCREASES AND
HEIGHTS LOWER WITH THE APPROACHING WEAK TROUGH. HIGHS WILL BE
AROUND 5 TO 15 DEGREES F ABOVE NORMAL FOR THIS TIME OF YEAR.

WEAK UPPER-LEVEL RIDGING WILL BUILD OVER THE AREA MONDAY AND
TUESDAY...MAINTAINING ABOVE NORMAL HIGH TEMPERATURES AND A SHALLOW
MARINE LAYER TO BEGIN THE WEEK. ZONAL FLOW WILL SET UP OVER THE
REGION BY MID WEEK. THIS...AND A FEW TROUGHS MOVING BY TO OUR
NORTH...WILL LOWER HIGH TEMPERATURES TO NEAR NORMAL BY
THURSDAY...AND CREATE BREEZY WESTERLY WINDS IN THE MOUNTAINS AND
DESERTS EACH AFTERNOON AND EVENING.

WEAK OFFSHORE FLOW DEVELOPING ON FRIDAY WILL WARM COASTAL AND
VALLEY LOCATIONS AGAIN INTO THE 70S AND 80S...AND LIMIT NIGHT AND
MORNING LOW CLOUDS AND FOG ALONG THE COAST. ONSHORE FLOW WILL
QUICKLY RETURN NEXT WEEKEND AS A WEAK TROUGH APPROACHES FROM THE
WEST...CREATING A SLIGHTLY DEEPER MARINE LAYER AND LOWERING HIGH
TEMPERATURES TO SLIGHTLY ABOVE NORMAL FOR THIS TIME OF YEAR.
BREEZY WESTERLY WINDS...WITH LOCAL GUSTS NEAR 55 MPH...WILL BE
POSSIBLE SATURDAY AND SUNDAY OVER PORTIONS OF THE MOUNTAINS AND
DESERTS.

&&

.AVIATION...
291530Z...COASTAL AREAS...PATCHY FOG AND LOW CLOUDS WILL CONTINUE TO
DISSIPATE THROUGH 29/1630Z. VFR CONDS WITH SCT-BKN HIGH CLOUDS AOA
15000 FT MSL WILL PREVAIL THROUGH THIS AFTERNOON. LOW CLOUDS
RETURNING AFT 30/0300Z...WITH BASES 500-1000 FEET MSL AND TOPS UP TO
1500 FEET ALONG WITH AREAS OF FOG WHERE THE CLOUDS INTERSECT TERRAIN
IN THAT LAYER.

VALLEYS/MOUNTAINS/DESERTS...SCT-BKN CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH THIS EVENING.

&&

.MARINE...
830 AM...PATCHY FOG POSSIBLE AGAIN TONIGHT THROUGH MONDAY MORNING
THOUGH NOT LIKELY TO BE DENSE. OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...
830 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP
AND LONGSHORE CURRENTS THROUGH THIS AFTERNOON...AS WELL AS
ELEVATED SURF ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE
BEACH HAZARDS STATEMENT...LAXCFWSGX. SLIGHTLY ELEVATED SURF WILL
CONTINUE THROUGH EARLY NEXT WEEK THOUGH THE RIP CURRENT THREAT
WILL DIMINISH AS THE SWELL PERIOD DROPS.

&&

.SKYWARN...
SKYWARN ACTIVATION WILL NOT BE NEEDED TODAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT UNTIL 4 PM PDT THIS AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JJT
AVIATION/MARINE/BEACHES...23




000
FXUS66 KSGX 291021
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
321 AM PDT SUN MAR 29 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
TODAY AS IT DRIFTS ACROSS BAJA MEXICO...BUT IT WILL STILL BE
QUITE WARM INLAND. A SHALLOW MARINE LAYER WILL BRING LOW CLOUDS
AND AREAS OF FOG BACK TO THE COAST THIS MORNING AND AGAIN MONDAY
MORNING. MILD AND DRY NEXT WEEK WITH GUSTY WESTERLY WINDS IN THE
MOUNTAINS AND DESERTS AT TIMES EACH DAY AS STORMS PASS BY TO THE
NORTH.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

DRIER LOW LEVEL AIR NEAR THE COAST AND A BAND OF HIGH CLOUDS IS
LIMITING COASTAL FOG AND LOW CLOUDS. HOWEVER PATCHY DENSE FOG
WILL BE LIKELY MORE TOWARDS DAYBREAK ALONG THE COASTAL STRIP AND A
FEW MILES INLAND BUT SHOULD QUICKLY BURN OFF JUST AFTER SUNRISE.
COASTAL ONSHORE GRADIENTS REMAIN MODERATE WITH VERY LITTLE CHANGE
OBSERVED OVER THE PREVIOUS 24 HOURS.

A WEAK UPPER LEVEL TROUGH WILL PASS THROUGH TODAY AND THIS
EVENING. A CLOSED UPPER LOW ABOUT 700 MILES SW OF SAN DIEGO WILL
CONTINUE TO DRIFT SE AND PASS OVER THE SOUTHERN BAJA PENINSULA
MONDAY NIGHT AS IT WEAKENS INTO AN OPEN TROUGH. IN THE WAKE OF THE
UPPER TROUGH...A BRIEF UPPER LEVEL RIDGE WILL PASS BY ON TUESDAY
BRINGING A LITTLE WARMER TEMPS TO OUR REGION.

ON WEDNESDAY THE SYNOPTIC PATTERN WILL TRANSITION TO A FAIRLY
FAST ZONAL FLOW WITH EMBEDDED STORMS PASSING BY TO OUR NORTH. TWO
STRONGER STORMS WILL EJECT FROM THE GULF OF ALASKA BUT WILL LIKELY
REMAIN WELL NORTH OF OUR REGION MID AND LATE WEEK. HOWEVER...THIS
PATTERN WILL BRING SOME BATCHES OF HIGH CLOUDS TO OUR REGION AS
WELL AS PERSISTENT FRESH ONSHORE FLOW ACROSS MUCH OF SOUTHERN
CALIFORNIA. THE TWO STRONGER STORMS PASSING BY TO THE NORTH WILL
BRING A TIGHTENING PRESSURE GRADIENT AROUND WEDNESDAY AND
SATURDAY...WHICH WILL LIKELY CAUSE GUSTY WINDS...ESPECIALLY
THROUGH THE WEST TO EAST PASSES AND INTO THE DESERTS.
OTHERWISE...LITTLE CHANGE IN THE PATTERN IS EXPECTED THROUGH THE
NEW WEEK FOR OUR REGION WITH A CONTINUED DRY FORECAST.

&&

.AVIATION...

291000Z...COASTAL AREAS...LOW CLOUDS ARE FOG WITH BASES 400 FEET AND
TOPS 700 FEET EXPECTED TO SPREAD 5 TO 10 MILES INLAND OVER COASTAL
AREAS FROM 29/1100Z-1530Z. DENSE FOG WITH LESS THAN 1/4 SM VIS MAY
DEVELOP WHERE CLOUDS INTERSECT THE TERRAIN ON THE LOWER COASTAL
MESAS. THE FOG SHOULD ERODE TO THE COAST BETWEEN 29/1500Z-1600Z. SKC
CONDS WILL PERSIST THROUGH MID DAY TODAY WITH THE LOW CLOUDS
RETURNING AFT 30/0300Z.

VALLEYS/MOUNTAINS/DESERTS...SCT CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THROUGH THIS AFTERNOON...AS WELL AS ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH THIS AFTERNOON FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT





000
FXUS66 KSGX 291021
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
321 AM PDT SUN MAR 29 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
TODAY AS IT DRIFTS ACROSS BAJA MEXICO...BUT IT WILL STILL BE
QUITE WARM INLAND. A SHALLOW MARINE LAYER WILL BRING LOW CLOUDS
AND AREAS OF FOG BACK TO THE COAST THIS MORNING AND AGAIN MONDAY
MORNING. MILD AND DRY NEXT WEEK WITH GUSTY WESTERLY WINDS IN THE
MOUNTAINS AND DESERTS AT TIMES EACH DAY AS STORMS PASS BY TO THE
NORTH.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

DRIER LOW LEVEL AIR NEAR THE COAST AND A BAND OF HIGH CLOUDS IS
LIMITING COASTAL FOG AND LOW CLOUDS. HOWEVER PATCHY DENSE FOG
WILL BE LIKELY MORE TOWARDS DAYBREAK ALONG THE COASTAL STRIP AND A
FEW MILES INLAND BUT SHOULD QUICKLY BURN OFF JUST AFTER SUNRISE.
COASTAL ONSHORE GRADIENTS REMAIN MODERATE WITH VERY LITTLE CHANGE
OBSERVED OVER THE PREVIOUS 24 HOURS.

A WEAK UPPER LEVEL TROUGH WILL PASS THROUGH TODAY AND THIS
EVENING. A CLOSED UPPER LOW ABOUT 700 MILES SW OF SAN DIEGO WILL
CONTINUE TO DRIFT SE AND PASS OVER THE SOUTHERN BAJA PENINSULA
MONDAY NIGHT AS IT WEAKENS INTO AN OPEN TROUGH. IN THE WAKE OF THE
UPPER TROUGH...A BRIEF UPPER LEVEL RIDGE WILL PASS BY ON TUESDAY
BRINGING A LITTLE WARMER TEMPS TO OUR REGION.

ON WEDNESDAY THE SYNOPTIC PATTERN WILL TRANSITION TO A FAIRLY
FAST ZONAL FLOW WITH EMBEDDED STORMS PASSING BY TO OUR NORTH. TWO
STRONGER STORMS WILL EJECT FROM THE GULF OF ALASKA BUT WILL LIKELY
REMAIN WELL NORTH OF OUR REGION MID AND LATE WEEK. HOWEVER...THIS
PATTERN WILL BRING SOME BATCHES OF HIGH CLOUDS TO OUR REGION AS
WELL AS PERSISTENT FRESH ONSHORE FLOW ACROSS MUCH OF SOUTHERN
CALIFORNIA. THE TWO STRONGER STORMS PASSING BY TO THE NORTH WILL
BRING A TIGHTENING PRESSURE GRADIENT AROUND WEDNESDAY AND
SATURDAY...WHICH WILL LIKELY CAUSE GUSTY WINDS...ESPECIALLY
THROUGH THE WEST TO EAST PASSES AND INTO THE DESERTS.
OTHERWISE...LITTLE CHANGE IN THE PATTERN IS EXPECTED THROUGH THE
NEW WEEK FOR OUR REGION WITH A CONTINUED DRY FORECAST.

&&

.AVIATION...

291000Z...COASTAL AREAS...LOW CLOUDS ARE FOG WITH BASES 400 FEET AND
TOPS 700 FEET EXPECTED TO SPREAD 5 TO 10 MILES INLAND OVER COASTAL
AREAS FROM 29/1100Z-1530Z. DENSE FOG WITH LESS THAN 1/4 SM VIS MAY
DEVELOP WHERE CLOUDS INTERSECT THE TERRAIN ON THE LOWER COASTAL
MESAS. THE FOG SHOULD ERODE TO THE COAST BETWEEN 29/1500Z-1600Z. SKC
CONDS WILL PERSIST THROUGH MID DAY TODAY WITH THE LOW CLOUDS
RETURNING AFT 30/0300Z.

VALLEYS/MOUNTAINS/DESERTS...SCT CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THROUGH THIS AFTERNOON...AS WELL AS ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH THIS AFTERNOON FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT




000
FXUS66 KSGX 291021
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
321 AM PDT SUN MAR 29 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
TODAY AS IT DRIFTS ACROSS BAJA MEXICO...BUT IT WILL STILL BE
QUITE WARM INLAND. A SHALLOW MARINE LAYER WILL BRING LOW CLOUDS
AND AREAS OF FOG BACK TO THE COAST THIS MORNING AND AGAIN MONDAY
MORNING. MILD AND DRY NEXT WEEK WITH GUSTY WESTERLY WINDS IN THE
MOUNTAINS AND DESERTS AT TIMES EACH DAY AS STORMS PASS BY TO THE
NORTH.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

DRIER LOW LEVEL AIR NEAR THE COAST AND A BAND OF HIGH CLOUDS IS
LIMITING COASTAL FOG AND LOW CLOUDS. HOWEVER PATCHY DENSE FOG
WILL BE LIKELY MORE TOWARDS DAYBREAK ALONG THE COASTAL STRIP AND A
FEW MILES INLAND BUT SHOULD QUICKLY BURN OFF JUST AFTER SUNRISE.
COASTAL ONSHORE GRADIENTS REMAIN MODERATE WITH VERY LITTLE CHANGE
OBSERVED OVER THE PREVIOUS 24 HOURS.

A WEAK UPPER LEVEL TROUGH WILL PASS THROUGH TODAY AND THIS
EVENING. A CLOSED UPPER LOW ABOUT 700 MILES SW OF SAN DIEGO WILL
CONTINUE TO DRIFT SE AND PASS OVER THE SOUTHERN BAJA PENINSULA
MONDAY NIGHT AS IT WEAKENS INTO AN OPEN TROUGH. IN THE WAKE OF THE
UPPER TROUGH...A BRIEF UPPER LEVEL RIDGE WILL PASS BY ON TUESDAY
BRINGING A LITTLE WARMER TEMPS TO OUR REGION.

ON WEDNESDAY THE SYNOPTIC PATTERN WILL TRANSITION TO A FAIRLY
FAST ZONAL FLOW WITH EMBEDDED STORMS PASSING BY TO OUR NORTH. TWO
STRONGER STORMS WILL EJECT FROM THE GULF OF ALASKA BUT WILL LIKELY
REMAIN WELL NORTH OF OUR REGION MID AND LATE WEEK. HOWEVER...THIS
PATTERN WILL BRING SOME BATCHES OF HIGH CLOUDS TO OUR REGION AS
WELL AS PERSISTENT FRESH ONSHORE FLOW ACROSS MUCH OF SOUTHERN
CALIFORNIA. THE TWO STRONGER STORMS PASSING BY TO THE NORTH WILL
BRING A TIGHTENING PRESSURE GRADIENT AROUND WEDNESDAY AND
SATURDAY...WHICH WILL LIKELY CAUSE GUSTY WINDS...ESPECIALLY
THROUGH THE WEST TO EAST PASSES AND INTO THE DESERTS.
OTHERWISE...LITTLE CHANGE IN THE PATTERN IS EXPECTED THROUGH THE
NEW WEEK FOR OUR REGION WITH A CONTINUED DRY FORECAST.

&&

.AVIATION...

291000Z...COASTAL AREAS...LOW CLOUDS ARE FOG WITH BASES 400 FEET AND
TOPS 700 FEET EXPECTED TO SPREAD 5 TO 10 MILES INLAND OVER COASTAL
AREAS FROM 29/1100Z-1530Z. DENSE FOG WITH LESS THAN 1/4 SM VIS MAY
DEVELOP WHERE CLOUDS INTERSECT THE TERRAIN ON THE LOWER COASTAL
MESAS. THE FOG SHOULD ERODE TO THE COAST BETWEEN 29/1500Z-1600Z. SKC
CONDS WILL PERSIST THROUGH MID DAY TODAY WITH THE LOW CLOUDS
RETURNING AFT 30/0300Z.

VALLEYS/MOUNTAINS/DESERTS...SCT CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THROUGH THIS AFTERNOON...AS WELL AS ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH THIS AFTERNOON FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT





000
FXUS66 KSGX 290410
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
909 PM PDT SAT MAR 28 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
SUNDAY AS IT DRIFTS ACROSS NORTHERN BAJA...BUT IT WILL STILL BE
QUITE WARM INLAND. A SHALLOW MARINE LAYER WILL BRING LOW CLOUDS AND
AREAS OF FOG BACK TO THE COASTAL ZONES TONIGHT. MILD AND DRY NEXT
WEEK WITH GUSTY WESTERLY WINDS IN THE MOUNTAINS AND DESERTS AT TIMES
AS STORMS PASS BY TO THE NORTH.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

EVEN THOUGH A SEA BREEZE KEPT COASTAL AREAS COOLER TODAY...IT WAS
ANOTHER RECORD BREAKER INLAND AS TEMPERATURES SOARED BACK INTO THE
UPPER 80S AND LOWER 90S. PALM SPRINGS HIT THE CENTURY MARK FOR THE
FIRST TIME THIS YEAR TO BREAK A RECORD SET BACK IN 1969.

AT 8 PM PDT...A COMPACT AREA OF LOW PRESSURE ABOUT 675 MILES SW OF
SAN DIEGO WAS SLINGING HIGH CLOUDS TOWARD THE REGION. LOWER CLOUDS
WERE BEGINNING TO DEVELOP ALONG THE IMMEDIATE COAST BASED ON SFC
OBSERVATIONS BUT THEY WERE NOT VISIBLE BELOW THE HIGH CLOUD DECK.
THE 00Z MIRAMAR SOUNDING HAD A 6.5 DEGREE C INVERSION BASED NEAR 500
FEET. THIS WAS SEVERAL HUNDRED FT LOWER THAN YESTERDAY EVENING.
SURFACE PRESSURE GRADIENTS HAD INCREASED TO 5-6 MBS ONSHORE TO THE
LOWER DESERTS...BUT WERE NEUTRAL TO WEAK OFFSHORE FROM NV.

BASED ON THE LATEST CEILING OBSERVATIONS ALONG THE COAST...FOG
DEVELOPMENT MAY BE CLOSE TO AREAS AFFECTED LAST NIGHT. BUT BASED ON
THE LOWER INVERSION HEIGHT FROM THE NKX SOUNDING...AND A DEVELOPING
OFFSHORE TREND FROM NV...THE FOG COULD DEVELOP CLOSER TO THE COAST.
MITIGATING FACTORS WILL BE THE THICKNESS OF THE HIGH CLOUD DECK...
WHICH COULD KEEP THE LOW CLOUDS/FOG MORE PATCHY IN NATURE. COASTAL
AIRPORTS WILL BE AT SOME RISK OF DENSE FOG OVERNIGHT. CONDITIONS
WILL BE MONITORED CLOSELY FOR THE POSSIBLE ISSUANCE OF A DENSE FOG
ADVISORY LATER.

FAIR TONIGHT INLAND BEYOND TEN MILES...AND ANY FOG/LOW CLOUDS THAT
DEVELOP OVERNIGHT CLOSE TO THE COAST SHOULD BURN OFF QUICKLY...
LEAVING FAIR AND MILD WEATHER AGAIN ON SUNDAY. IT SHOULD BE A COUPLE
OF DEGREES COOLER...MAINLY DUE TO THE PATCHY HIGH CLOUDS AND
SLIGHTLY LOWER THICKNESS AS THE WEAK TROUGH APPROACHES THE MEXICAN
COAST.

THE LATEST GFS/EC RUNS CARRY THE COMPACT LOW...CURRENTLY WELL
OFFSHORE...SE...BRINGING IT ONSHORE JUST SOUTH OF PUNTA EUGENIA TUE
MORNING. THIS WILL HAVE LITTLE AFFECT ON SOCAL WEATHER EXCEPT FOR
SOME HIGH CLOUDS AND A SLIGHT DROP IN HEIGHTS/THICKNESS. A STRONGER
SERIES OF TROUGHS WILL MOVE EAST OFF THE PACIFIC...ACROSS THE PACNW
AND INTO THE NORTHERN ROCKIES THROUGH FRI OF NEXT WEEK. THESE
SYSTEMS ARE TOO FAR NORTH TO BRING US ANY PRECIP...BUT THEY WILL
KEEP OUR SURFACE GRADIENTS ONSHORE WITH GUSTY WESTERLY WINDS IN THE
MTS/DESERTS AT TIMES. THERE WILL ALSO BE A MARINE LAYER WEST OF THE
MOUNTAINS...WITH PERIODS OF NIGHT AND MORNING LOW CLOUDS AND FOG.
TEMPERATURES WILL BE CLOSER TO AVERAGE NEXT WEEK UNDER MOSTLY ZONAL
FLOW ALOFT.

THE WEATHER FOR NEXT WEEKEND INTO THE FOLLOWING WEEK LOOKS
CONSIDERABLY DIFFERENT THAN THIS PAST WEEKEND AS A LARGE TROUGH
DEVELOPS OVER THE WEST. DETAILS AND TIMING ARE NOT CERTAIN...BUT
SEVERAL OF THE PAST EC/GFS DETERMINISTIC RUNS LOOK SIMILAR ENOUGH
WITH THE LONGWAVE PATTERN TO BEGIN BUILDING CONFIDENCE IN THIS
CHANGE. EXPECT STRONGER WESTERLY WINDS OVER THE MTS/DESERTS AND MUCH
COOLER WEATHER THEN.

&&

.AVIATION... 290300Z...COASTAL AREAS...LOW CLOUDS AND FOG ARE MOVING
ONTO THE BEACHES AT THIS TIME AND WILL PUSH ABOUT 5 MILES INLAND
OVERNIGHT...WITH CIGS 200-600 FEET MSL. PATCHY FOG IS LIKELY AGAIN
TONIGHT WITH VIS 1-3 SM WHERE CLOUDS INTERSECT TERRAIN. LOCAL DENSE
FOG IS POSSIBLE AS WELL...ESPECIALLY ON THE COASTAL MESAS...INCL
KCRQ. LOW CLOUDS AND FOG EXPECTED TO CLEAR OFF THE COAST BY 16Z SUN.

VALLEYS/MOUNTAINS/DESERTS...SCT CLOUDS AOA 15000 FEET WITH
UNRESTRICTED VIS THROUGH SUNDAY.

&&

.MARINE...

800 PM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS INTO SUNDAY AFTERNOON...AS WELL AS ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...JAD
AVIATION/MARINE...PG





000
FXUS66 KSGX 282043
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
140 PM PDT SAT MAR 28 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
SUNDAY AS IT DRIFTS ACROSS NORTHERN BAJA...BUT IT WILL STILL BE VERY
WARM IN THE INLAND AREAS. A SHALLOW MARINE LAYER WILL BRING LOW
CLOUDS AND AREAS OF DENSE FOG BACK TO THE COASTAL ZONES TONIGHT.
NEXT WEEK WILL BE WARMER THAN AVERAGE IN MOST AREAS. STORMS PASSING
BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE MOUNTAINS AND
DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

1 PM COASTAL TEMPERATURES WERE IN THE UPPER 60S AND LOWER
70S...WHICH WAS 5-15 DEGREES LOWER THAN YESTERDAY. THIS WAS DUE TO
THE 500 FOOT DEEP MARINE LAYER THAT ROLLED INLAND LAST NIGHT. THERE
WAS NOT NEARLY THE SAME AMT OF COOLING IN THE VALLEYS...ONLY 1 TO 7
DEGREES LOWER...WHERE TEMPERATURES TEMPERATURES WERE IN THE 80S.
MOUNTAIN AND DESERT TEMPERATURES WERE RUNNING SEVERAL DEGREES WARMER
THAN YESTERDAY.

SCATTERED LOW CLOUDS WERE ALREADY RETURNING TO THE BEACHES THIS
AFTERNOON. A SHALLOW 500 FOOT DEEP MARINE LAYER WILL RESULT IN
ANOTHER NIGHT OF LOW CLOUDS AND FOG IN THE COASTAL ZONES. THE MARINE
LAYER WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN A COUPLE HUNDRED
FEET WITH THE APPROACHING UPPER TROUGH...SO AREAS OF DENSE FOG ARE
MOST LIKELY IN THE COASTAL ZONES JUST INLAND FROM THE BEACHES...THE
COASTAL MESAS AND THE FAR WESTERN SAN DIEGO VALLEYS. ON SUNDAY THE
LOWER HEIGHTS...SOME HIGH CLOUDS AND STRONGER ONSHORE FLOW WILL
CONTRIBUTE TO MINOR COOLING IN THE VALLEY...MTN AND DESERT ZONES.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGERS THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONG SHORTWAVE AND JET
STREAM DIPPING SOUTHWARD INTO CENTRAL CALIFORNIA WILL BRING FURTHER
COOLING TO SO-CAL ALONG WITH STRONG WESTERLY WINDS IN THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS A ZONAL FLOW PATTERN FRIDAY TO TRANSITION INTO A DEEP WEST
COAST TROUGH SATURDAY AND SUNDAY THAT WILL EXTEND ALL THE WAY DOWN
INTO SOUTHERN CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN
OVER THE WEST COAST...BUT IT KEEPS THE JET STREAM AND SHORTWAVE
ENERGY FARTHER NORTH OVER NORTHERN CALIFORNIA. THIS DEVELOPING
PATTERN WILL BE SOMETHING TO KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

282000Z...COASTAL AREAS...LOW CLOUDS AND FOG ARE HOVERING JUST
OFFSHORE THIS AFTERNOON AND MAY AFFECT SOME BEACHES BRIEFLY.
OTHERWISE...MOSTLY SUNNY SKIES AND UNRESTRICTED VIS WILL PREVAIL
THROUGH THIS EVENING. AFT 29/00Z...PATCHY LOW CLOUDS AND FOG WILL
REDEVELOP AT THE IMMEDIATE COAST AND PUSH 5 TO 10 SM INLAND
OVERNIGHT. PATCHY FOG IS LIKELY AGAIN TONIGHT WITH VIS 1-3 SM WHERE
CLOUDS INTERSECT TERRAIN. LOCAL DENSE FOG IS POSSIBLE AS
WELL...ESPECIALLY ON THE COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND
FOG EXPECTED TO CLEAR OFF THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

100 PM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

100 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23




000
FXUS66 KSGX 282043
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
140 PM PDT SAT MAR 28 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
SUNDAY AS IT DRIFTS ACROSS NORTHERN BAJA...BUT IT WILL STILL BE VERY
WARM IN THE INLAND AREAS. A SHALLOW MARINE LAYER WILL BRING LOW
CLOUDS AND AREAS OF DENSE FOG BACK TO THE COASTAL ZONES TONIGHT.
NEXT WEEK WILL BE WARMER THAN AVERAGE IN MOST AREAS. STORMS PASSING
BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE MOUNTAINS AND
DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

1 PM COASTAL TEMPERATURES WERE IN THE UPPER 60S AND LOWER
70S...WHICH WAS 5-15 DEGREES LOWER THAN YESTERDAY. THIS WAS DUE TO
THE 500 FOOT DEEP MARINE LAYER THAT ROLLED INLAND LAST NIGHT. THERE
WAS NOT NEARLY THE SAME AMT OF COOLING IN THE VALLEYS...ONLY 1 TO 7
DEGREES LOWER...WHERE TEMPERATURES TEMPERATURES WERE IN THE 80S.
MOUNTAIN AND DESERT TEMPERATURES WERE RUNNING SEVERAL DEGREES WARMER
THAN YESTERDAY.

SCATTERED LOW CLOUDS WERE ALREADY RETURNING TO THE BEACHES THIS
AFTERNOON. A SHALLOW 500 FOOT DEEP MARINE LAYER WILL RESULT IN
ANOTHER NIGHT OF LOW CLOUDS AND FOG IN THE COASTAL ZONES. THE MARINE
LAYER WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN A COUPLE HUNDRED
FEET WITH THE APPROACHING UPPER TROUGH...SO AREAS OF DENSE FOG ARE
MOST LIKELY IN THE COASTAL ZONES JUST INLAND FROM THE BEACHES...THE
COASTAL MESAS AND THE FAR WESTERN SAN DIEGO VALLEYS. ON SUNDAY THE
LOWER HEIGHTS...SOME HIGH CLOUDS AND STRONGER ONSHORE FLOW WILL
CONTRIBUTE TO MINOR COOLING IN THE VALLEY...MTN AND DESERT ZONES.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGERS THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONG SHORTWAVE AND JET
STREAM DIPPING SOUTHWARD INTO CENTRAL CALIFORNIA WILL BRING FURTHER
COOLING TO SO-CAL ALONG WITH STRONG WESTERLY WINDS IN THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS A ZONAL FLOW PATTERN FRIDAY TO TRANSITION INTO A DEEP WEST
COAST TROUGH SATURDAY AND SUNDAY THAT WILL EXTEND ALL THE WAY DOWN
INTO SOUTHERN CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN
OVER THE WEST COAST...BUT IT KEEPS THE JET STREAM AND SHORTWAVE
ENERGY FARTHER NORTH OVER NORTHERN CALIFORNIA. THIS DEVELOPING
PATTERN WILL BE SOMETHING TO KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

282000Z...COASTAL AREAS...LOW CLOUDS AND FOG ARE HOVERING JUST
OFFSHORE THIS AFTERNOON AND MAY AFFECT SOME BEACHES BRIEFLY.
OTHERWISE...MOSTLY SUNNY SKIES AND UNRESTRICTED VIS WILL PREVAIL
THROUGH THIS EVENING. AFT 29/00Z...PATCHY LOW CLOUDS AND FOG WILL
REDEVELOP AT THE IMMEDIATE COAST AND PUSH 5 TO 10 SM INLAND
OVERNIGHT. PATCHY FOG IS LIKELY AGAIN TONIGHT WITH VIS 1-3 SM WHERE
CLOUDS INTERSECT TERRAIN. LOCAL DENSE FOG IS POSSIBLE AS
WELL...ESPECIALLY ON THE COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND
FOG EXPECTED TO CLEAR OFF THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

100 PM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

100 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23





000
FXUS66 KSGX 282043
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
140 PM PDT SAT MAR 28 2015

.SYNOPSIS...

A WEAK TROUGH OF LOW PRESSURE WILL BRING A FEW DEGREES OF COOLING
SUNDAY AS IT DRIFTS ACROSS NORTHERN BAJA...BUT IT WILL STILL BE VERY
WARM IN THE INLAND AREAS. A SHALLOW MARINE LAYER WILL BRING LOW
CLOUDS AND AREAS OF DENSE FOG BACK TO THE COASTAL ZONES TONIGHT.
NEXT WEEK WILL BE WARMER THAN AVERAGE IN MOST AREAS. STORMS PASSING
BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE MOUNTAINS AND
DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

1 PM COASTAL TEMPERATURES WERE IN THE UPPER 60S AND LOWER
70S...WHICH WAS 5-15 DEGREES LOWER THAN YESTERDAY. THIS WAS DUE TO
THE 500 FOOT DEEP MARINE LAYER THAT ROLLED INLAND LAST NIGHT. THERE
WAS NOT NEARLY THE SAME AMT OF COOLING IN THE VALLEYS...ONLY 1 TO 7
DEGREES LOWER...WHERE TEMPERATURES TEMPERATURES WERE IN THE 80S.
MOUNTAIN AND DESERT TEMPERATURES WERE RUNNING SEVERAL DEGREES WARMER
THAN YESTERDAY.

SCATTERED LOW CLOUDS WERE ALREADY RETURNING TO THE BEACHES THIS
AFTERNOON. A SHALLOW 500 FOOT DEEP MARINE LAYER WILL RESULT IN
ANOTHER NIGHT OF LOW CLOUDS AND FOG IN THE COASTAL ZONES. THE MARINE
LAYER WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN A COUPLE HUNDRED
FEET WITH THE APPROACHING UPPER TROUGH...SO AREAS OF DENSE FOG ARE
MOST LIKELY IN THE COASTAL ZONES JUST INLAND FROM THE BEACHES...THE
COASTAL MESAS AND THE FAR WESTERN SAN DIEGO VALLEYS. ON SUNDAY THE
LOWER HEIGHTS...SOME HIGH CLOUDS AND STRONGER ONSHORE FLOW WILL
CONTRIBUTE TO MINOR COOLING IN THE VALLEY...MTN AND DESERT ZONES.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGERS THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONG SHORTWAVE AND JET
STREAM DIPPING SOUTHWARD INTO CENTRAL CALIFORNIA WILL BRING FURTHER
COOLING TO SO-CAL ALONG WITH STRONG WESTERLY WINDS IN THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS A ZONAL FLOW PATTERN FRIDAY TO TRANSITION INTO A DEEP WEST
COAST TROUGH SATURDAY AND SUNDAY THAT WILL EXTEND ALL THE WAY DOWN
INTO SOUTHERN CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN
OVER THE WEST COAST...BUT IT KEEPS THE JET STREAM AND SHORTWAVE
ENERGY FARTHER NORTH OVER NORTHERN CALIFORNIA. THIS DEVELOPING
PATTERN WILL BE SOMETHING TO KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

282000Z...COASTAL AREAS...LOW CLOUDS AND FOG ARE HOVERING JUST
OFFSHORE THIS AFTERNOON AND MAY AFFECT SOME BEACHES BRIEFLY.
OTHERWISE...MOSTLY SUNNY SKIES AND UNRESTRICTED VIS WILL PREVAIL
THROUGH THIS EVENING. AFT 29/00Z...PATCHY LOW CLOUDS AND FOG WILL
REDEVELOP AT THE IMMEDIATE COAST AND PUSH 5 TO 10 SM INLAND
OVERNIGHT. PATCHY FOG IS LIKELY AGAIN TONIGHT WITH VIS 1-3 SM WHERE
CLOUDS INTERSECT TERRAIN. LOCAL DENSE FOG IS POSSIBLE AS
WELL...ESPECIALLY ON THE COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND
FOG EXPECTED TO CLEAR OFF THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

100 PM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

100 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23





000
FXUS66 KSGX 281710
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1000 AM PDT SAT MAR 28 2015

.SYNOPSIS...

HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST THIS WEEKEND. A
SHALLOW MARINE LAYER WILL BRING COOLING TO THE COASTAL AREAS
TODAY...BUT IT WILL CONTINUE HOT IN THE VALLEYS AND DESERTS. DENSE
FOG IS LIKELY NEAR THE COAST AGAIN TONIGHT. SLIGHTLY COOLER IN ALL
AREAS SUNDAY WITH A WEAK TROUGH OVER SOUTHERN CALIFORNIA. NEXT WEEK
WILL CONTINUE TO BE WARMER THAN AVERAGE IN MOST AREAS. STORMS
PASSING BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE
MOUNTAINS AND DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A SHALLOW 400 FOOT DEEP MARINE LAYER CAPPED BY A STRONG INVERSION IS
PREVENTING THE LOW CLOUDS FROM MIXING OUT IN COASTAL ORANGE COUNTY
AND NORTHERN SAN DIEGO COUNTY THIS MORNING. BUT SURFACE HEATING
ALONG WITH MINOR COOLING ALOFT AHEAD OF THE TROUGH APPROACHING FROM
THE WEST SHOULD MIX OUT THE CLOUDS AT THE BEACHES THIS AFTERNOON.

THE MARINE LAYER WILL BRING A COOLER DAY TO THE COASTAL AREAS...BUT
IT WILL REMAIN HOT INLAND WITH VALLEY TEMPS IN THE MID 80S TO LOW
90S. RECORD HEAT IS LIKELY AT PALM SPRINGS AND THERMAL WHERE THE MAX
TEMPERATURE COULD REACH 100 FOR THE FIRST TIME THIS YEAR. THE RECORD
HIGH FOR BOTH STATIONS IS 97 WHICH WERE BOTH SET IN 1969.

THE MARINE LAYER DEPTH WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN
A COUPLE HUNDRED FEET WITH THE UPPER TROUGH...SO AREAS OF DENSE FOG
ARE LIKELY IN THE COASTAL ZONES AND FAR WESTERN SAN DIEGO VALLEYS
TONIGHT INTO SUNDAY MORNING. THE TROUGH WILL BRING LOWER HEIGHTS...
SOME HIGH CLOUDS...AND STRONGER ONSHORE FLOW...ALL OF WHICH WILL
CONTRIBUTE TO A FEW DEGREES OF COOLING TOMORROW.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGER THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONGER SHORTWAVE AND A
SOUTHERLY DIP IN THE JET STREAM INTO NORTHERN CALIFORNIA WILL BRING
FURTHER COOLING ALONG WITH STRONG WESTERLY WINDS TO THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS ZONAL FLOW FRIDAY TO TRANSITION INTO A DEEP WEST COAST
TROUGH SATURDAY AND SUNDAY EXTENDING ALL THE WAY DOWN INTO SOUTHERN
CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN...BUT KEEPS THE
JET STREAM AND SHORTWAVE ENERGY FARTHER NORTH OVER NORTHERN AND
CENTRAL CALIFORNIA. THIS DEVELOPING PATTERN WILL BE SOMETHING TO
KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

281600Z...COASTAL AREAS...LOW CLOUDS AND FOG HAVE MOSTLY DISSIPATED
AND ERODED OFF THE COAST AT THIS TIME. MOSTLY SUNNY SKIES AND
UNRESTRICTED VIS WILL PREVAIL THROUGH THIS EVENING. AFT
29/00Z...PATCHY LOW CLOUDS AND FOG WILL REDEVELOP AT THE IMMEDIATE
COAST AND REMAIN VARIABLE/PATCHY IN COVERAGE THROUGH THE NIGHT.
PATCHY DENSE FOG IS A POSSIBILITY AGAIN TONIGHT...ESPECIALLY ON THE
COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND FOG EXPECTED TO CLEAR OFF
THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

900 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

900 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23




000
FXUS66 KSGX 281710
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1000 AM PDT SAT MAR 28 2015

.SYNOPSIS...

HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST THIS WEEKEND. A
SHALLOW MARINE LAYER WILL BRING COOLING TO THE COASTAL AREAS
TODAY...BUT IT WILL CONTINUE HOT IN THE VALLEYS AND DESERTS. DENSE
FOG IS LIKELY NEAR THE COAST AGAIN TONIGHT. SLIGHTLY COOLER IN ALL
AREAS SUNDAY WITH A WEAK TROUGH OVER SOUTHERN CALIFORNIA. NEXT WEEK
WILL CONTINUE TO BE WARMER THAN AVERAGE IN MOST AREAS. STORMS
PASSING BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE
MOUNTAINS AND DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A SHALLOW 400 FOOT DEEP MARINE LAYER CAPPED BY A STRONG INVERSION IS
PREVENTING THE LOW CLOUDS FROM MIXING OUT IN COASTAL ORANGE COUNTY
AND NORTHERN SAN DIEGO COUNTY THIS MORNING. BUT SURFACE HEATING
ALONG WITH MINOR COOLING ALOFT AHEAD OF THE TROUGH APPROACHING FROM
THE WEST SHOULD MIX OUT THE CLOUDS AT THE BEACHES THIS AFTERNOON.

THE MARINE LAYER WILL BRING A COOLER DAY TO THE COASTAL AREAS...BUT
IT WILL REMAIN HOT INLAND WITH VALLEY TEMPS IN THE MID 80S TO LOW
90S. RECORD HEAT IS LIKELY AT PALM SPRINGS AND THERMAL WHERE THE MAX
TEMPERATURE COULD REACH 100 FOR THE FIRST TIME THIS YEAR. THE RECORD
HIGH FOR BOTH STATIONS IS 97 WHICH WERE BOTH SET IN 1969.

THE MARINE LAYER DEPTH WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN
A COUPLE HUNDRED FEET WITH THE UPPER TROUGH...SO AREAS OF DENSE FOG
ARE LIKELY IN THE COASTAL ZONES AND FAR WESTERN SAN DIEGO VALLEYS
TONIGHT INTO SUNDAY MORNING. THE TROUGH WILL BRING LOWER HEIGHTS...
SOME HIGH CLOUDS...AND STRONGER ONSHORE FLOW...ALL OF WHICH WILL
CONTRIBUTE TO A FEW DEGREES OF COOLING TOMORROW.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGER THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONGER SHORTWAVE AND A
SOUTHERLY DIP IN THE JET STREAM INTO NORTHERN CALIFORNIA WILL BRING
FURTHER COOLING ALONG WITH STRONG WESTERLY WINDS TO THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS ZONAL FLOW FRIDAY TO TRANSITION INTO A DEEP WEST COAST
TROUGH SATURDAY AND SUNDAY EXTENDING ALL THE WAY DOWN INTO SOUTHERN
CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN...BUT KEEPS THE
JET STREAM AND SHORTWAVE ENERGY FARTHER NORTH OVER NORTHERN AND
CENTRAL CALIFORNIA. THIS DEVELOPING PATTERN WILL BE SOMETHING TO
KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

281600Z...COASTAL AREAS...LOW CLOUDS AND FOG HAVE MOSTLY DISSIPATED
AND ERODED OFF THE COAST AT THIS TIME. MOSTLY SUNNY SKIES AND
UNRESTRICTED VIS WILL PREVAIL THROUGH THIS EVENING. AFT
29/00Z...PATCHY LOW CLOUDS AND FOG WILL REDEVELOP AT THE IMMEDIATE
COAST AND REMAIN VARIABLE/PATCHY IN COVERAGE THROUGH THE NIGHT.
PATCHY DENSE FOG IS A POSSIBILITY AGAIN TONIGHT...ESPECIALLY ON THE
COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND FOG EXPECTED TO CLEAR OFF
THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

900 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

900 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23





000
FXUS66 KSGX 281710
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1000 AM PDT SAT MAR 28 2015

.SYNOPSIS...

HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST THIS WEEKEND. A
SHALLOW MARINE LAYER WILL BRING COOLING TO THE COASTAL AREAS
TODAY...BUT IT WILL CONTINUE HOT IN THE VALLEYS AND DESERTS. DENSE
FOG IS LIKELY NEAR THE COAST AGAIN TONIGHT. SLIGHTLY COOLER IN ALL
AREAS SUNDAY WITH A WEAK TROUGH OVER SOUTHERN CALIFORNIA. NEXT WEEK
WILL CONTINUE TO BE WARMER THAN AVERAGE IN MOST AREAS. STORMS
PASSING BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE
MOUNTAINS AND DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A SHALLOW 400 FOOT DEEP MARINE LAYER CAPPED BY A STRONG INVERSION IS
PREVENTING THE LOW CLOUDS FROM MIXING OUT IN COASTAL ORANGE COUNTY
AND NORTHERN SAN DIEGO COUNTY THIS MORNING. BUT SURFACE HEATING
ALONG WITH MINOR COOLING ALOFT AHEAD OF THE TROUGH APPROACHING FROM
THE WEST SHOULD MIX OUT THE CLOUDS AT THE BEACHES THIS AFTERNOON.

THE MARINE LAYER WILL BRING A COOLER DAY TO THE COASTAL AREAS...BUT
IT WILL REMAIN HOT INLAND WITH VALLEY TEMPS IN THE MID 80S TO LOW
90S. RECORD HEAT IS LIKELY AT PALM SPRINGS AND THERMAL WHERE THE MAX
TEMPERATURE COULD REACH 100 FOR THE FIRST TIME THIS YEAR. THE RECORD
HIGH FOR BOTH STATIONS IS 97 WHICH WERE BOTH SET IN 1969.

THE MARINE LAYER DEPTH WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN
A COUPLE HUNDRED FEET WITH THE UPPER TROUGH...SO AREAS OF DENSE FOG
ARE LIKELY IN THE COASTAL ZONES AND FAR WESTERN SAN DIEGO VALLEYS
TONIGHT INTO SUNDAY MORNING. THE TROUGH WILL BRING LOWER HEIGHTS...
SOME HIGH CLOUDS...AND STRONGER ONSHORE FLOW...ALL OF WHICH WILL
CONTRIBUTE TO A FEW DEGREES OF COOLING TOMORROW.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGER THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONGER SHORTWAVE AND A
SOUTHERLY DIP IN THE JET STREAM INTO NORTHERN CALIFORNIA WILL BRING
FURTHER COOLING ALONG WITH STRONG WESTERLY WINDS TO THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS ZONAL FLOW FRIDAY TO TRANSITION INTO A DEEP WEST COAST
TROUGH SATURDAY AND SUNDAY EXTENDING ALL THE WAY DOWN INTO SOUTHERN
CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN...BUT KEEPS THE
JET STREAM AND SHORTWAVE ENERGY FARTHER NORTH OVER NORTHERN AND
CENTRAL CALIFORNIA. THIS DEVELOPING PATTERN WILL BE SOMETHING TO
KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

281600Z...COASTAL AREAS...LOW CLOUDS AND FOG HAVE MOSTLY DISSIPATED
AND ERODED OFF THE COAST AT THIS TIME. MOSTLY SUNNY SKIES AND
UNRESTRICTED VIS WILL PREVAIL THROUGH THIS EVENING. AFT
29/00Z...PATCHY LOW CLOUDS AND FOG WILL REDEVELOP AT THE IMMEDIATE
COAST AND REMAIN VARIABLE/PATCHY IN COVERAGE THROUGH THE NIGHT.
PATCHY DENSE FOG IS A POSSIBILITY AGAIN TONIGHT...ESPECIALLY ON THE
COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND FOG EXPECTED TO CLEAR OFF
THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

900 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

900 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23




000
FXUS66 KSGX 281710
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1000 AM PDT SAT MAR 28 2015

.SYNOPSIS...

HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST THIS WEEKEND. A
SHALLOW MARINE LAYER WILL BRING COOLING TO THE COASTAL AREAS
TODAY...BUT IT WILL CONTINUE HOT IN THE VALLEYS AND DESERTS. DENSE
FOG IS LIKELY NEAR THE COAST AGAIN TONIGHT. SLIGHTLY COOLER IN ALL
AREAS SUNDAY WITH A WEAK TROUGH OVER SOUTHERN CALIFORNIA. NEXT WEEK
WILL CONTINUE TO BE WARMER THAN AVERAGE IN MOST AREAS. STORMS
PASSING BY TO THE NORTH WILL PRODUCE GUSTY WEST WINDS IN THE
MOUNTAINS AND DESERTS WEDNESDAY AND THURSDAY.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A SHALLOW 400 FOOT DEEP MARINE LAYER CAPPED BY A STRONG INVERSION IS
PREVENTING THE LOW CLOUDS FROM MIXING OUT IN COASTAL ORANGE COUNTY
AND NORTHERN SAN DIEGO COUNTY THIS MORNING. BUT SURFACE HEATING
ALONG WITH MINOR COOLING ALOFT AHEAD OF THE TROUGH APPROACHING FROM
THE WEST SHOULD MIX OUT THE CLOUDS AT THE BEACHES THIS AFTERNOON.

THE MARINE LAYER WILL BRING A COOLER DAY TO THE COASTAL AREAS...BUT
IT WILL REMAIN HOT INLAND WITH VALLEY TEMPS IN THE MID 80S TO LOW
90S. RECORD HEAT IS LIKELY AT PALM SPRINGS AND THERMAL WHERE THE MAX
TEMPERATURE COULD REACH 100 FOR THE FIRST TIME THIS YEAR. THE RECORD
HIGH FOR BOTH STATIONS IS 97 WHICH WERE BOTH SET IN 1969.

THE MARINE LAYER DEPTH WILL NOT CHANGE MUCH TONIGHT...PERHAPS DEEPEN
A COUPLE HUNDRED FEET WITH THE UPPER TROUGH...SO AREAS OF DENSE FOG
ARE LIKELY IN THE COASTAL ZONES AND FAR WESTERN SAN DIEGO VALLEYS
TONIGHT INTO SUNDAY MORNING. THE TROUGH WILL BRING LOWER HEIGHTS...
SOME HIGH CLOUDS...AND STRONGER ONSHORE FLOW...ALL OF WHICH WILL
CONTRIBUTE TO A FEW DEGREES OF COOLING TOMORROW.

THE TROUGH PROGRESSION ACROSS THE SOUTHWEST HAS SLOWED AND IT NOW
LINGER THROUGH MONDAY BEFORE DRIFTING EAST MONDAY NIGHT. WEAK
RIDGING TUESDAY WILL BRING MINOR WARMING AND A BRIEF PERIOD OF WEAK
OFFSHORE FLOW. ON WEDNESDAY AND THURSDAY A STRONGER SHORTWAVE AND A
SOUTHERLY DIP IN THE JET STREAM INTO NORTHERN CALIFORNIA WILL BRING
FURTHER COOLING ALONG WITH STRONG WESTERLY WINDS TO THE MOUNTAINS
AND DESERTS.

THE LONG RANGE OUTLOOK FOR FRIDAY THROUGH NEXT WEEKEND...THE GFS
FORECASTS ZONAL FLOW FRIDAY TO TRANSITION INTO A DEEP WEST COAST
TROUGH SATURDAY AND SUNDAY EXTENDING ALL THE WAY DOWN INTO SOUTHERN
CALIFORNIA. THE ECMWF HAS A SIMILAR TROUGH PATTERN...BUT KEEPS THE
JET STREAM AND SHORTWAVE ENERGY FARTHER NORTH OVER NORTHERN AND
CENTRAL CALIFORNIA. THIS DEVELOPING PATTERN WILL BE SOMETHING TO
KEEP AN EYE ON IN THE COMING WEEK.

&&

.AVIATION...

281600Z...COASTAL AREAS...LOW CLOUDS AND FOG HAVE MOSTLY DISSIPATED
AND ERODED OFF THE COAST AT THIS TIME. MOSTLY SUNNY SKIES AND
UNRESTRICTED VIS WILL PREVAIL THROUGH THIS EVENING. AFT
29/00Z...PATCHY LOW CLOUDS AND FOG WILL REDEVELOP AT THE IMMEDIATE
COAST AND REMAIN VARIABLE/PATCHY IN COVERAGE THROUGH THE NIGHT.
PATCHY DENSE FOG IS A POSSIBILITY AGAIN TONIGHT...ESPECIALLY ON THE
COASTAL MESAS...INCL KCRQ. LOW CLOUDS AND FOG EXPECTED TO CLEAR OFF
THE COAST 29/15-17Z.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH SUNDAY.

&&

.MARINE...

900 AM...PATCHY DENSE FOG POSSIBLE AGAIN TONIGHT THROUGH SUNDAY
MORNING...OTHERWISE NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH
TUESDAY.

&&

.BEACHES...

900 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...MOEDE
AVIATION/MARINE...23





000
FXUS66 KSGX 281020
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
320 AM PDT SAT MAR 28 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER HAS BROUGHT
AREAS OF DENSE FOG TO THE COASTAL STRIP AND UP TO ABOUT 10 MILES
INLAND OVERNIGHT AND THIS MORNING. CONTINUED HOT WELL INLAND ON
SATURDAY...THEN SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY
WEATHER WILL CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND
MORNING LOW CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW
ALOFT...ALONG WITH PERIODS OF GUSTY WESTERLY WINDS POSSIBLE FOR
THE INLAND MOUNTAIN PASSES AND DESERT FLOORS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

WEAK ONSHORE GRADIENTS HAVE COMMENCED SINCE LATE FRIDAY ALONG THE
SOCAL COAST. THE MARINE INVERSION IS VERY SHALLOW ALLOWING FOR
AREAS OF DENSE FOG AND VERY LOW STRATUS CLOUDS TO FORM OVER THE
COASTAL WATERS...ALONG THE COAST AND UP TO ABOUT 10 MILES INLAND.
FOG IS ALSO BEGINNING TO FORM IN SOUTHERN ORANGE COUNTY AND WILL
CONTINUE TO FILL IN THROUGH DAYBREAK ACROSS COASTAL ORANGE COUNTY.
A DENSE FOG ADVISORY WAS ISSUED FRIDAY EVENING AND IS IN EFFECT
UNTIL 9 AM THIS MORNING.

A CLOSED UPPER LOW WAS LOCATED ABOUT 900 MILES WSW OF SAN DIEGO
EARLY THIS MORNING. THIS FEATURE IS PREDICTED TO SLIDE SE THROUGH
SUNDAY NIGHT TO CENTRAL BAJA AND WEAKEN TO AN OPEN TROUGH. GENERAL
ONSHORE FLOW WILL CONTINUE ACROSS OUR REGION DURING THIS TIME WITH
SOME THIN HIGH CLOUDS LIKELY ON SUNDAY WITH THE TROUGH.

BRIEF SHORTWAVE RIDGING ON TUESDAY WITH A BRIEF WARMUP ACROSS THE
REGION. ON WEDNESDAY ANOTHER SHORTWAVE WILL PASS OVERHEAD BRINGING
ANOTHER ONSHORE PUSH WITH COOLER TEMPERATURES THROUGH THE VALLEYS.
GRADIENTS WILL PICKUP THROUGH WEDNESDAY NIGHT ON THE HEELS OF YET
ANOTHER SHORTWAVE WHICH MAY BE A BIT STRONGER. WINDS COULD BECOME
QUITE GUSTY ESPECIALLY THROUGH THE WEST TO EAST PASSES AND INTO
THE DESERT FLOORS WEDNESDAY AND WEDNESDAY NIGHT AS A RESULT.

AFTER WEDNESDAY AND THROUGH THE REMAINDER OF THE WORK
WEEK...BENIGN ZONAL FLOW IS LIKELY TO CONTINUE WITH ONLY MINOR
IMPULSES BRINGING PERIODS OF STRONGER ONSHORE FLOW AND HIGH CLOUDS
OVERHEAD. A LOT OF DISAGREEMENTS IN THE MEDIUM RANGE MODELS FOR
NEXT WEEKEND AS TO THE DEPTH AND STRENGTH OF THE LONGWAVE GULF OF
ALASKA TROUGH AND IF IT MIGHT AFFECT PORTIONS OF CALIFORNIA. WAY
TOO FAR OUT TO PREDICT ANY DETAILS AT THIS TIME...BUT AT LEAST AN
INTERESTING WEATHER FEATURE TO KEEP AN EYE ON.

&&

.AVIATION...

280930Z...COASTAL AREAS...LOW CLOUDS AND FOG WITH BASES 400 FT MSL
AND TOPS 700 MSL HAVE MOVED AROUND 5 MILES INLAND ALONG THE
COAST...MAINLY IN SAN DIEGO COUNTY. VIS 1/4 SM HAS BEEN REPORTED AT
KCRQ...KMYF..AND KSDM. ALONG THE IMMEDIATE COAST VIS HAS BEEN RANGING
FROM 1/2 SM TO 3 SM. THE FOG WILL SLOWLY SPREAD NORTHWARD AND AFFECT
THE COASTAL AREAS OF ORANGE COUNTY AFT 28/1030Z. LOW CLOUDS AND FOG
WILL DISSIPATE AND ERODE TO THE COAST BY AROUND 28/1500Z. MOSTLY
SUNNY SKIES WILL PERSIST THROUGH THIS EVENING. HOWEVER...AFT
28/2100Z...PATCHY STRATUS MAY DEVELOP AT THE IMMEDIATE COAST.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG THROUGH MID MORNING...OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.


&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

     DENSE FOG ADVISORY UNTIL 9 AM PDT THIS MORNING FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT




000
FXUS66 KSGX 281020
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
320 AM PDT SAT MAR 28 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER HAS BROUGHT
AREAS OF DENSE FOG TO THE COASTAL STRIP AND UP TO ABOUT 10 MILES
INLAND OVERNIGHT AND THIS MORNING. CONTINUED HOT WELL INLAND ON
SATURDAY...THEN SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY
WEATHER WILL CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND
MORNING LOW CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW
ALOFT...ALONG WITH PERIODS OF GUSTY WESTERLY WINDS POSSIBLE FOR
THE INLAND MOUNTAIN PASSES AND DESERT FLOORS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

WEAK ONSHORE GRADIENTS HAVE COMMENCED SINCE LATE FRIDAY ALONG THE
SOCAL COAST. THE MARINE INVERSION IS VERY SHALLOW ALLOWING FOR
AREAS OF DENSE FOG AND VERY LOW STRATUS CLOUDS TO FORM OVER THE
COASTAL WATERS...ALONG THE COAST AND UP TO ABOUT 10 MILES INLAND.
FOG IS ALSO BEGINNING TO FORM IN SOUTHERN ORANGE COUNTY AND WILL
CONTINUE TO FILL IN THROUGH DAYBREAK ACROSS COASTAL ORANGE COUNTY.
A DENSE FOG ADVISORY WAS ISSUED FRIDAY EVENING AND IS IN EFFECT
UNTIL 9 AM THIS MORNING.

A CLOSED UPPER LOW WAS LOCATED ABOUT 900 MILES WSW OF SAN DIEGO
EARLY THIS MORNING. THIS FEATURE IS PREDICTED TO SLIDE SE THROUGH
SUNDAY NIGHT TO CENTRAL BAJA AND WEAKEN TO AN OPEN TROUGH. GENERAL
ONSHORE FLOW WILL CONTINUE ACROSS OUR REGION DURING THIS TIME WITH
SOME THIN HIGH CLOUDS LIKELY ON SUNDAY WITH THE TROUGH.

BRIEF SHORTWAVE RIDGING ON TUESDAY WITH A BRIEF WARMUP ACROSS THE
REGION. ON WEDNESDAY ANOTHER SHORTWAVE WILL PASS OVERHEAD BRINGING
ANOTHER ONSHORE PUSH WITH COOLER TEMPERATURES THROUGH THE VALLEYS.
GRADIENTS WILL PICKUP THROUGH WEDNESDAY NIGHT ON THE HEELS OF YET
ANOTHER SHORTWAVE WHICH MAY BE A BIT STRONGER. WINDS COULD BECOME
QUITE GUSTY ESPECIALLY THROUGH THE WEST TO EAST PASSES AND INTO
THE DESERT FLOORS WEDNESDAY AND WEDNESDAY NIGHT AS A RESULT.

AFTER WEDNESDAY AND THROUGH THE REMAINDER OF THE WORK
WEEK...BENIGN ZONAL FLOW IS LIKELY TO CONTINUE WITH ONLY MINOR
IMPULSES BRINGING PERIODS OF STRONGER ONSHORE FLOW AND HIGH CLOUDS
OVERHEAD. A LOT OF DISAGREEMENTS IN THE MEDIUM RANGE MODELS FOR
NEXT WEEKEND AS TO THE DEPTH AND STRENGTH OF THE LONGWAVE GULF OF
ALASKA TROUGH AND IF IT MIGHT AFFECT PORTIONS OF CALIFORNIA. WAY
TOO FAR OUT TO PREDICT ANY DETAILS AT THIS TIME...BUT AT LEAST AN
INTERESTING WEATHER FEATURE TO KEEP AN EYE ON.

&&

.AVIATION...

280930Z...COASTAL AREAS...LOW CLOUDS AND FOG WITH BASES 400 FT MSL
AND TOPS 700 MSL HAVE MOVED AROUND 5 MILES INLAND ALONG THE
COAST...MAINLY IN SAN DIEGO COUNTY. VIS 1/4 SM HAS BEEN REPORTED AT
KCRQ...KMYF..AND KSDM. ALONG THE IMMEDIATE COAST VIS HAS BEEN RANGING
FROM 1/2 SM TO 3 SM. THE FOG WILL SLOWLY SPREAD NORTHWARD AND AFFECT
THE COASTAL AREAS OF ORANGE COUNTY AFT 28/1030Z. LOW CLOUDS AND FOG
WILL DISSIPATE AND ERODE TO THE COAST BY AROUND 28/1500Z. MOSTLY
SUNNY SKIES WILL PERSIST THROUGH THIS EVENING. HOWEVER...AFT
28/2100Z...PATCHY STRATUS MAY DEVELOP AT THE IMMEDIATE COAST.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG THROUGH MID MORNING...OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.


&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

     DENSE FOG ADVISORY UNTIL 9 AM PDT THIS MORNING FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT




000
FXUS66 KSGX 281020
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
320 AM PDT SAT MAR 28 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER HAS BROUGHT
AREAS OF DENSE FOG TO THE COASTAL STRIP AND UP TO ABOUT 10 MILES
INLAND OVERNIGHT AND THIS MORNING. CONTINUED HOT WELL INLAND ON
SATURDAY...THEN SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY
WEATHER WILL CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND
MORNING LOW CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW
ALOFT...ALONG WITH PERIODS OF GUSTY WESTERLY WINDS POSSIBLE FOR
THE INLAND MOUNTAIN PASSES AND DESERT FLOORS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

WEAK ONSHORE GRADIENTS HAVE COMMENCED SINCE LATE FRIDAY ALONG THE
SOCAL COAST. THE MARINE INVERSION IS VERY SHALLOW ALLOWING FOR
AREAS OF DENSE FOG AND VERY LOW STRATUS CLOUDS TO FORM OVER THE
COASTAL WATERS...ALONG THE COAST AND UP TO ABOUT 10 MILES INLAND.
FOG IS ALSO BEGINNING TO FORM IN SOUTHERN ORANGE COUNTY AND WILL
CONTINUE TO FILL IN THROUGH DAYBREAK ACROSS COASTAL ORANGE COUNTY.
A DENSE FOG ADVISORY WAS ISSUED FRIDAY EVENING AND IS IN EFFECT
UNTIL 9 AM THIS MORNING.

A CLOSED UPPER LOW WAS LOCATED ABOUT 900 MILES WSW OF SAN DIEGO
EARLY THIS MORNING. THIS FEATURE IS PREDICTED TO SLIDE SE THROUGH
SUNDAY NIGHT TO CENTRAL BAJA AND WEAKEN TO AN OPEN TROUGH. GENERAL
ONSHORE FLOW WILL CONTINUE ACROSS OUR REGION DURING THIS TIME WITH
SOME THIN HIGH CLOUDS LIKELY ON SUNDAY WITH THE TROUGH.

BRIEF SHORTWAVE RIDGING ON TUESDAY WITH A BRIEF WARMUP ACROSS THE
REGION. ON WEDNESDAY ANOTHER SHORTWAVE WILL PASS OVERHEAD BRINGING
ANOTHER ONSHORE PUSH WITH COOLER TEMPERATURES THROUGH THE VALLEYS.
GRADIENTS WILL PICKUP THROUGH WEDNESDAY NIGHT ON THE HEELS OF YET
ANOTHER SHORTWAVE WHICH MAY BE A BIT STRONGER. WINDS COULD BECOME
QUITE GUSTY ESPECIALLY THROUGH THE WEST TO EAST PASSES AND INTO
THE DESERT FLOORS WEDNESDAY AND WEDNESDAY NIGHT AS A RESULT.

AFTER WEDNESDAY AND THROUGH THE REMAINDER OF THE WORK
WEEK...BENIGN ZONAL FLOW IS LIKELY TO CONTINUE WITH ONLY MINOR
IMPULSES BRINGING PERIODS OF STRONGER ONSHORE FLOW AND HIGH CLOUDS
OVERHEAD. A LOT OF DISAGREEMENTS IN THE MEDIUM RANGE MODELS FOR
NEXT WEEKEND AS TO THE DEPTH AND STRENGTH OF THE LONGWAVE GULF OF
ALASKA TROUGH AND IF IT MIGHT AFFECT PORTIONS OF CALIFORNIA. WAY
TOO FAR OUT TO PREDICT ANY DETAILS AT THIS TIME...BUT AT LEAST AN
INTERESTING WEATHER FEATURE TO KEEP AN EYE ON.

&&

.AVIATION...

280930Z...COASTAL AREAS...LOW CLOUDS AND FOG WITH BASES 400 FT MSL
AND TOPS 700 MSL HAVE MOVED AROUND 5 MILES INLAND ALONG THE
COAST...MAINLY IN SAN DIEGO COUNTY. VIS 1/4 SM HAS BEEN REPORTED AT
KCRQ...KMYF..AND KSDM. ALONG THE IMMEDIATE COAST VIS HAS BEEN RANGING
FROM 1/2 SM TO 3 SM. THE FOG WILL SLOWLY SPREAD NORTHWARD AND AFFECT
THE COASTAL AREAS OF ORANGE COUNTY AFT 28/1030Z. LOW CLOUDS AND FOG
WILL DISSIPATE AND ERODE TO THE COAST BY AROUND 28/1500Z. MOSTLY
SUNNY SKIES WILL PERSIST THROUGH THIS EVENING. HOWEVER...AFT
28/2100Z...PATCHY STRATUS MAY DEVELOP AT THE IMMEDIATE COAST.

VALLEYS/MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VIS
THROUGH TONIGHT.

&&

.MARINE...

230 AM...PATCHY DENSE FOG THROUGH MID MORNING...OTHERWISE NO
HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.


&&

.BEACHES...

230 AM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS ELEVATED SURF ALONG
SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

     DENSE FOG ADVISORY UNTIL 9 AM PDT THIS MORNING FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...JT





000
FXUS66 KSGX 280543 AAA
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1042 PM PDT FRI MAR 27 2015

.QUICK UPDATE...
HAVE ISSUED A DENSE FOG ADVISORY FOR THE COASTAL
STRIP AS DENSE FOG IS RAPIDLY DEVELOPING ACROSS SOUTHERN COASTAL SAN
DIEGO COUNTY ATTM. MOISTURE RICH AIR SITUATED ALONG THE COAST AND HI-
RES MODELS INDICATE DENSE FOG LIKELY TO SPREAD ACROSS THE REMAINDER
OF SD COUNTY AND EVENTUALLY INTO ORANGE COUNTY AFTER 1 AM THIS
EVENING. NO OTHER CHANGES TO THE FORECAST AT THIS TIME.

&&

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

QUICK UPDATE...JMB
PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG





000
FXUS66 KSGX 280543 AAA
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1042 PM PDT FRI MAR 27 2015

.QUICK UPDATE...
HAVE ISSUED A DENSE FOG ADVISORY FOR THE COASTAL
STRIP AS DENSE FOG IS RAPIDLY DEVELOPING ACROSS SOUTHERN COASTAL SAN
DIEGO COUNTY ATTM. MOISTURE RICH AIR SITUATED ALONG THE COAST AND HI-
RES MODELS INDICATE DENSE FOG LIKELY TO SPREAD ACROSS THE REMAINDER
OF SD COUNTY AND EVENTUALLY INTO ORANGE COUNTY AFTER 1 AM THIS
EVENING. NO OTHER CHANGES TO THE FORECAST AT THIS TIME.

&&

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

QUICK UPDATE...JMB
PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG




000
FXUS66 KSGX 280543 AAA
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1042 PM PDT FRI MAR 27 2015

.QUICK UPDATE...
HAVE ISSUED A DENSE FOG ADVISORY FOR THE COASTAL
STRIP AS DENSE FOG IS RAPIDLY DEVELOPING ACROSS SOUTHERN COASTAL SAN
DIEGO COUNTY ATTM. MOISTURE RICH AIR SITUATED ALONG THE COAST AND HI-
RES MODELS INDICATE DENSE FOG LIKELY TO SPREAD ACROSS THE REMAINDER
OF SD COUNTY AND EVENTUALLY INTO ORANGE COUNTY AFTER 1 AM THIS
EVENING. NO OTHER CHANGES TO THE FORECAST AT THIS TIME.

&&

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

QUICK UPDATE...JMB
PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG




000
FXUS66 KSGX 280543 AAA
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1042 PM PDT FRI MAR 27 2015

.QUICK UPDATE...
HAVE ISSUED A DENSE FOG ADVISORY FOR THE COASTAL
STRIP AS DENSE FOG IS RAPIDLY DEVELOPING ACROSS SOUTHERN COASTAL SAN
DIEGO COUNTY ATTM. MOISTURE RICH AIR SITUATED ALONG THE COAST AND HI-
RES MODELS INDICATE DENSE FOG LIKELY TO SPREAD ACROSS THE REMAINDER
OF SD COUNTY AND EVENTUALLY INTO ORANGE COUNTY AFTER 1 AM THIS
EVENING. NO OTHER CHANGES TO THE FORECAST AT THIS TIME.

&&

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

QUICK UPDATE...JMB
PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG





000
FXUS66 KSGX 280403
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
902 PM PDT FRI MAR 27 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG




000
FXUS66 KSGX 280403
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
902 PM PDT FRI MAR 27 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG




000
FXUS66 KSGX 280403
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
902 PM PDT FRI MAR 27 2015

.SYNOPSIS... HIGH PRESSURE ALOFT WILL WEAKEN AND DRIFT EAST OVER THE
WEEKEND...ALLOWING ONSHORE FLOW TO INCREASE...AND A RETURN OF THE
MARINE LAYER FOR COOLER DAYS. A SHALLOW MOIST LAYER UNDER CLEAR
SKIES TONIGHT...MAY RESULT IN LOCALLY DENSE FOG WITHIN ABOUT TEN
MILES OF THE COAST. CONTINUED HOT WELL INLAND ON SATURDAY...THEN
SLIGHTLY COOLER ON SUNDAY. FAIR...MILD...AND DRY WEATHER WILL
CONTINUE THROUGH NEXT WEEK...WITH AREAS OF NIGHT AND MORNING LOW
CLOUDS AND FOG AT TIMES UNDER WESTERLY FLOW ALOFT.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

AREAS OF DENSE FOG POSSIBLE TONIGHT INTO SATURDAY MORNING...

SATELLITE IMAGERY AND COASTAL OBSERVATIONS THROUGH 9 PM PDT...SHOWED
LOW CLOUDS DEVELOPING AND BEGINNING TO SPREAD INLAND. THE 00Z
MIRAMAR SOUNDING SHOWED THE SHIFT TO THE WEST OF THE LOW LEVEL
WINDS...AND HAD A LOW 5 DEGREE C INVERSION BASED NEAR 300 FT.
SURFACE PRESSURE GRADIENTS SHOWED SOLID ONSHORE TRENDS TODAY. AT 8
PM PDT THEY WERE NEUTRAL TO NV...BUT 4-5 MBS ONSHORE TO THE
LOWER DESERTS. WIND GUSTS WERE MOSTLY UNDER 20 MPH

AFTER MANY HIGH TEMPERATURE RECORDS TODAY...INCLUDING A TIE AT
LINDBERGH FIELD WITH 82 F...COOLER MARINE AIR HAS ARRIVED ALONG THE
COAST. BASED ON THE 00Z NKX SOUNDING...IT IS QUITE SHALLOW...AND
BASED ON THE OBSERVED DEWPOINTS...FOG DEVELOPMENT LOOKS
LIKELY TONIGHT. A DENSE FOG ADVISORY MAY BE NEEDED FOR PORTIONS OF
THE COAST LATER TONIGHT INTO SAT MORNING.

THE STRONG HIGH ALOFT WILL DEFLATE AND MOVE EAST SAT...WHILE A
WEAK UPPER-LEVEL TROUGH DEVELOPS OVER THE REGION ON SUNDAY. THIS
WILL KEEP THE LOW-LEVEL WINDS ONSHORE FOR COOLER DAYS OVER COASTAL
AREAS THIS WEEKEND. A SHALLOW MARINE LAYER WILL KEEP THE THREAT OF
LOW CLOUDS AND LOCAL DENSE FOG OVER COASTAL AREAS NIGHTS AND
MORNINGS AS WELL. CONTINUED HOT WELL INLAND ON SATURDAY...THEN A
LITTLE COOLER SUNDAY. HOWEVER...DAYTIME TEMPERATURES WILL CONTINUE
RUNNING SEVERAL DEGREES F ABOVE NORMAL WELL INTO NEXT WEEK WITH THE
MAIN BAND OF WESTERLIES REMAINING WELL TO THE NORTH.

BY NEXT WEEKEND...MODELS ARE HINTING AT A STRONGER TROUGH DEVELOPING
OVER THE WEST. DIFFERENCES BETWEEN SOLUTIONS REMAIN SIGNIFICANT...
BUT GIVEN THE FORECAST HEIGHTS/THICKNESS...IT COULD BE RATHER
COOL...AND IT MAY BE THE FIRST REAL CHANCE OF SOME PRECIPITATION
ACROSS SOCAL IN SOME TIME.

&&

.AVIATION...
280300Z...COASTAL AREAS...AREAS OF LOW CLOUDS AND FOG ARE OVER THE
COASTAL WATERS AT THIS TIME...WITH PATCHES ALONG THE IMMEDIATE COAST
OF SOUTHERN SAN DIEGO COUNTY. CONFIDENCE IS HIGH THAT LOW CLOUDS AND
FOG WILL IMPACT COASTAL TAF SITES OVERNIGHT. EXPECT KSAN TO BE
IMPACTED FIRST WITH CIGS AROUND 300 FT MSL AND TOPS TO 1000 FT
MSL...FOLLOWED BY KCRQ THEN KSNA. HOWEVER...THE EXACT TIMING IS
UNCERTAIN. IT IS DOUBTFUL THAT KONT WILL BE IMPACTED. AREAS OF VIS 1-
3SM LOCALLY BLO 1SM WILL LIKELY ACCOMPANY THE LOW CLOUDS. EXPECT LOW
CLOUDS AND FOG TO CLEAR AROUND 16Z SAT.

INLAND...MOSTLY CLEAR WITH UNRESTRICTED VIS THROUGH SAT.

&&

.MARINE...

800 PM...PATCHY DENSE FOG TONIGHT...OTHERWISE NO HAZARDOUS MARINE
WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.BEACHES...

800 PM...A SOUTH SWELL WITH A LONG PERIOD WILL CREATE STRONG RIP AND
LONGSHORE CURRENTS THIS WEEKEND...AS WELL AS SOMEWHAT ELEVATED SURF
ALONG SOUTH-FACING BEACHES. FOR DETAILS SEE THE BEACH HAZARDS
STATEMENT...LAXCFWSGX.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY AFTERNOON FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

PUBLIC...JAD
AVIATION/MARINE/BEACHES...PG





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