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000
AXNT20 KNHC 261806
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1745 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 07N11W TO
04N18W WHERE THE ITCZ BEGINS AND CONTINUES ALONG 01N32W 01N40W
TO THE NORTHERN COAST OF BRAZIL NEAR 01S50W. ISOLATED MODERATE
CONVECTION AND TSTMS ARE WITHIN 75 NM EITHER SIDE OF THE MONSOON
TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

A MIDDLE TO UPPER LEVEL TROUGH EXTENDING FROM THE INTERMOUNTAIN
WEST TO THE SOUTHWEST U.S. SUPPORTS A LOW PRESSURE SYSTEM
EXTENDING FROM IDAHO SE TO NORTHERN MEXICO AND ACROSS THE GULF
OF MEXICO. A SURFACE TROUGH EXTENDS FROM NORTHERN FLORIDA
WESTWARD IS ALONG THE NORTHERN BASIN FROM 29N83W TO 28N90W TO
27N97W TO A 1004 MB LOW OVER NE MEXICO. SSMI TPW IMAGERY SHOW A
HIGHER CONCENTRATION OF MOISTURE OVER THE W-NW GULF THAT IS
ENHANCING HEAVY SHOWERS AND TSTMS FROM 26N-29N BETWEEN 90W AND
94W AND SUPPORTS SEA FOG ELSEWHERE N OF 26N W OF 90W. ISOLATED
SHOWERS AND TSTMS ARE ALSO NOTICED OVER PORTIONS OF NORTHERN
FLORIDA ENHANCED BY DAYTIME HEATING. WINDS W OF 90W S OF THE
TROUGH AXIS ARE FROM THE S-SE RANGING FROM 10 TO 15 KT. ON THE
REMAINDER BASIN S OF THE TROUGH AXIS...WINDS RANGE BETWEEN FROM
10 TO 15 KT AND ARE FROM THE S-SW. MIDDLE TO UPPER LEVEL RIDGING
AND DRY AIR SUBSIDENCE DOMINATE OVER THE CENTRAL AND SOUTHERN
GULF...THUS SUPPORTING FAIR WEATHER. A COLD FRONT ASSOCIATED
WITH THE LOW PRESSURE SYSTEM INLAND WILL EMERGE FROM THE TEXAS
COAST MONDAY MORNING AND WILL CONTINUE TO TRAVERSE THE GULF
THROUGH WED WITH SHOWERS.

CARIBBEAN SEA...

SHALLOW MOISTURE ASSOCIATED WITH A DISSIPATING COLD FRONT OVER
THE CENTRAL ATLC LINGERS OVER WESTERN HISPANIOLA AND THE
WINDWARD PASSAGE SUPPORTING SCATTERED TO ISOLATED CLOUDS INLAND.
A HIGHER CONCENTRATION OF MOISTURE IS ALONG THE COASTS FROM
VENEZUELA TO COSTA RICA THAT ENHANCES SCATTERED TO ISOLATED
SHOWERS S OF 13N BETWEEN 73W AND 83W. THE REMAINDER BASIN IS
UNDER THE INFLUENCE OF A BROAD MIDDLE TO UPPER LEVEL RIDGE AND
DEEP LAYER DRY AIR...THUS SUPPORTING FAIR WEATHER. TRADES OF 20
KT ARE OVER THE CENTRAL BASIN S OF 15N BETWEEN 64W AND 76W.
TRADES OF 10 TO 15 KT DOMINATE ELSEWHERE. LITTLE CHANGE IS
EXPECTED OVER THE NEXT 48 HOURS.

...HISPANIOLA...

SHALLOW MOISTURE ASSOCIATED WITH A DISSIPATING COLD FRONT OVER
THE CENTRAL ATLC LINGERS OVER WESTERN HISPANIOLA AND THE
WINDWARD PASSAGE SUPPORTING SCATTERED TO ISOLATED CLOUDS INLAND.
HOWEVER...THE ISLAND IS UNDER THE INFLUENCE OF A MIDDLE TO UPPER
LEVEL RIDGE AND DRY AIR SUBSIDENCE THAT SUPPORTS STABILITY AND
FAIR WEATHER. FAIR WEATHER CONDITIONS ARE EXPECTED TO CONTINUE
DURING THE NEXT TWO DAYS.

ATLANTIC OCEAN...

A MIDDLE TO UPPER LEVEL LOW NEAR NOVA SCOTIA SUPPORTS A LOW
PRESSURE SYSTEM OVER THE NW ATLC FROM WHICH A COLD FRONT EXTENDS
ENTERING THE AREA OF DISCUSSION FROM 30N49W TO 27N52W WHERE IT
STARTS TO DISSIPATE TO 25N57W...JUST S OF A 1015 MB DISSIPATING
HIGH PRESSURE CENTER NEAR 27N58W. WEST OF THE HIGH PRESSURE
CENTER...TRAILING MOISTURE ASSOCIATED WITH THE FRONT AND A
DIFFLUENT ENVIRONMENT ALOFT SUPPORT SCATTERED SHOWERS AND TSTMS
N OF 26N W OF 65W. IN ADDITION...SCATTERED SHOWERS ARE WITHIN
300 NM EITHER SIDE OF THE FRONTAL BOUNDARY. SURFACE RIDGING
DOMINATES ELSEWHERE ACROSS THE ATLC. A COLD FRONT ENTERS THE SW
N ATLC WATERS MONDAY MORNING REACHING THE CENTRAL BASIN WED
MORNING.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR


000
AXPZ20 KNHC 261510
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1430 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE ITCZ EXTENDS FROM 08N95W TO A 1007 MB LOW NEAR 07N99W TO
04N107W TO 05N112W...THEN RESUMES NEAR 08N130W TO A 1010 MB LOW
NEAR 08N136W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG
WITHIN 120 NM EITHER SIDE OF THE AXIS BETWEEN 95W AND 103W...AND
FROM 02N TO 05N BETWEEN 103W AND 111W. SCATTERED MODERATE FROM
08N TO 12N BETWEEN 128W AND 133W.

...DISCUSSION...
A MIDDLE TO UPPER LEVEL TROUGH IS NOTED ON WATER VAPOR IMAGERY
OVER THE NORTHERN DISCUSSION WATERS WITH AXIS EXTENDING FROM THE
PARENT UPPER LEVEL LOW CENTERED OVER THE SOUTHWESTERN U.S. SW TO
27N114W TO A BASE NEAR 22N130W. WHILE OVERALL DRY AND STABLE AIR
ALOFT REMAINS ASSOCIATED WITH THE TROUGHING AND ALSO AN UPPER
LEVEL ANTICYCLONIC CIRCULATION TO THE W-NW OF THE TROUGH
CENTERED NEAR 29N134W...A DISSIPATING COLD FRONT EXTENDS FROM
NORTHERN BAJA CALIFORNIA NEAR 31N115W TO 30N120W TO 31N125W. NW
WINDS IN THE RANGE OF 20 TO 25 KT ARE OCCURRING N OF 29N WITHIN
120 NM OF THE BAJA COAST. WITH MAXIMUM SEAS AT 10 FT NEAR
30N120W...SEAS 8 FT AND HIGHER COVER THE AREA N OF 26N E OF 125W
IN NW SWELL. IN ADDITION...ON THE SOUTHEASTERN PERIPHERY OF THE
UPPER LEVEL TROUGH...A 600 NM WIDE SWATH OF MOISTURE EXISTS
ADVECTING THE MOISTURE AND CLOUDINESS NE AWAY FROM CONVECTION
OCCURRING WITHIN THE ITCZ ZONE. THE WIND FIELD ASSOCIATED WITH
THIS FEATURE IS EXPECTED TO DIMINISH BY MONDAY WITH SEAS
GRADUALLY SUBSIDING THEREAFTER.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N134W WITH A
RIDGE AXIS EXTENDING SE FROM THE HIGH TO 18N110W. THE PRESSURE
GRADIENT SW OF THE RIDGING AND N OF THE LOWER PRESSURE VALUES
ASSOCIATED WITH THE ITCZ IS SUPPORTING AN AREA OF FRESH TO
STRONG TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N113W TO 09N114W TO 06N113W WITH
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION FROM 05N TO
13N BETWEEN 112W AND 117W. THE WESTERN TROUGH EXTENDS FROM
11N126W TO A 1009 MB LOW NEAR 07N127W TO 03N127W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM THE EQUATOR TO 13N
BETWEEN 118W AND 128W. THE AREA OF TRADES IS EXPECTED TO
DIMINISH TO LESS THAN 20 KT BY 48 HOURS AS THE PRESSURE GRADIENT
ACROSS THE REGION WEAKENS.

E OF 110W...OVERNIGHT SCATTEROMETER DATA INDICATES THAT WINDS
CONDITIONS RANGE FROM A LIGHT TO MODERATE BREEZE AND ARE
ACCOMPANIED BY 3 TO 6 FT SEAS.

$$
HUFFMAN


000
AXPZ20 KNHC 261510
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1430 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE ITCZ EXTENDS FROM 08N95W TO A 1007 MB LOW NEAR 07N99W TO
04N107W TO 05N112W...THEN RESUMES NEAR 08N130W TO A 1010 MB LOW
NEAR 08N136W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG
WITHIN 120 NM EITHER SIDE OF THE AXIS BETWEEN 95W AND 103W...AND
FROM 02N TO 05N BETWEEN 103W AND 111W. SCATTERED MODERATE FROM
08N TO 12N BETWEEN 128W AND 133W.

...DISCUSSION...
A MIDDLE TO UPPER LEVEL TROUGH IS NOTED ON WATER VAPOR IMAGERY
OVER THE NORTHERN DISCUSSION WATERS WITH AXIS EXTENDING FROM THE
PARENT UPPER LEVEL LOW CENTERED OVER THE SOUTHWESTERN U.S. SW TO
27N114W TO A BASE NEAR 22N130W. WHILE OVERALL DRY AND STABLE AIR
ALOFT REMAINS ASSOCIATED WITH THE TROUGHING AND ALSO AN UPPER
LEVEL ANTICYCLONIC CIRCULATION TO THE W-NW OF THE TROUGH
CENTERED NEAR 29N134W...A DISSIPATING COLD FRONT EXTENDS FROM
NORTHERN BAJA CALIFORNIA NEAR 31N115W TO 30N120W TO 31N125W. NW
WINDS IN THE RANGE OF 20 TO 25 KT ARE OCCURRING N OF 29N WITHIN
120 NM OF THE BAJA COAST. WITH MAXIMUM SEAS AT 10 FT NEAR
30N120W...SEAS 8 FT AND HIGHER COVER THE AREA N OF 26N E OF 125W
IN NW SWELL. IN ADDITION...ON THE SOUTHEASTERN PERIPHERY OF THE
UPPER LEVEL TROUGH...A 600 NM WIDE SWATH OF MOISTURE EXISTS
ADVECTING THE MOISTURE AND CLOUDINESS NE AWAY FROM CONVECTION
OCCURRING WITHIN THE ITCZ ZONE. THE WIND FIELD ASSOCIATED WITH
THIS FEATURE IS EXPECTED TO DIMINISH BY MONDAY WITH SEAS
GRADUALLY SUBSIDING THEREAFTER.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N134W WITH A
RIDGE AXIS EXTENDING SE FROM THE HIGH TO 18N110W. THE PRESSURE
GRADIENT SW OF THE RIDGING AND N OF THE LOWER PRESSURE VALUES
ASSOCIATED WITH THE ITCZ IS SUPPORTING AN AREA OF FRESH TO
STRONG TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N113W TO 09N114W TO 06N113W WITH
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION FROM 05N TO
13N BETWEEN 112W AND 117W. THE WESTERN TROUGH EXTENDS FROM
11N126W TO A 1009 MB LOW NEAR 07N127W TO 03N127W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM THE EQUATOR TO 13N
BETWEEN 118W AND 128W. THE AREA OF TRADES IS EXPECTED TO
DIMINISH TO LESS THAN 20 KT BY 48 HOURS AS THE PRESSURE GRADIENT
ACROSS THE REGION WEAKENS.

E OF 110W...OVERNIGHT SCATTEROMETER DATA INDICATES THAT WINDS
CONDITIONS RANGE FROM A LIGHT TO MODERATE BREEZE AND ARE
ACCOMPANIED BY 3 TO 6 FT SEAS.

$$
HUFFMAN



000
AXPZ20 KNHC 261510
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1430 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE ITCZ EXTENDS FROM 08N95W TO A 1007 MB LOW NEAR 07N99W TO
04N107W TO 05N112W...THEN RESUMES NEAR 08N130W TO A 1010 MB LOW
NEAR 08N136W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG
WITHIN 120 NM EITHER SIDE OF THE AXIS BETWEEN 95W AND 103W...AND
FROM 02N TO 05N BETWEEN 103W AND 111W. SCATTERED MODERATE FROM
08N TO 12N BETWEEN 128W AND 133W.

...DISCUSSION...
A MIDDLE TO UPPER LEVEL TROUGH IS NOTED ON WATER VAPOR IMAGERY
OVER THE NORTHERN DISCUSSION WATERS WITH AXIS EXTENDING FROM THE
PARENT UPPER LEVEL LOW CENTERED OVER THE SOUTHWESTERN U.S. SW TO
27N114W TO A BASE NEAR 22N130W. WHILE OVERALL DRY AND STABLE AIR
ALOFT REMAINS ASSOCIATED WITH THE TROUGHING AND ALSO AN UPPER
LEVEL ANTICYCLONIC CIRCULATION TO THE W-NW OF THE TROUGH
CENTERED NEAR 29N134W...A DISSIPATING COLD FRONT EXTENDS FROM
NORTHERN BAJA CALIFORNIA NEAR 31N115W TO 30N120W TO 31N125W. NW
WINDS IN THE RANGE OF 20 TO 25 KT ARE OCCURRING N OF 29N WITHIN
120 NM OF THE BAJA COAST. WITH MAXIMUM SEAS AT 10 FT NEAR
30N120W...SEAS 8 FT AND HIGHER COVER THE AREA N OF 26N E OF 125W
IN NW SWELL. IN ADDITION...ON THE SOUTHEASTERN PERIPHERY OF THE
UPPER LEVEL TROUGH...A 600 NM WIDE SWATH OF MOISTURE EXISTS
ADVECTING THE MOISTURE AND CLOUDINESS NE AWAY FROM CONVECTION
OCCURRING WITHIN THE ITCZ ZONE. THE WIND FIELD ASSOCIATED WITH
THIS FEATURE IS EXPECTED TO DIMINISH BY MONDAY WITH SEAS
GRADUALLY SUBSIDING THEREAFTER.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N134W WITH A
RIDGE AXIS EXTENDING SE FROM THE HIGH TO 18N110W. THE PRESSURE
GRADIENT SW OF THE RIDGING AND N OF THE LOWER PRESSURE VALUES
ASSOCIATED WITH THE ITCZ IS SUPPORTING AN AREA OF FRESH TO
STRONG TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N113W TO 09N114W TO 06N113W WITH
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION FROM 05N TO
13N BETWEEN 112W AND 117W. THE WESTERN TROUGH EXTENDS FROM
11N126W TO A 1009 MB LOW NEAR 07N127W TO 03N127W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM THE EQUATOR TO 13N
BETWEEN 118W AND 128W. THE AREA OF TRADES IS EXPECTED TO
DIMINISH TO LESS THAN 20 KT BY 48 HOURS AS THE PRESSURE GRADIENT
ACROSS THE REGION WEAKENS.

E OF 110W...OVERNIGHT SCATTEROMETER DATA INDICATES THAT WINDS
CONDITIONS RANGE FROM A LIGHT TO MODERATE BREEZE AND ARE
ACCOMPANIED BY 3 TO 6 FT SEAS.

$$
HUFFMAN



000
AXNT20 KNHC 261023
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
4N20W WHERE THE ITCZ BEGINS AND CONTINUES SOUTH OF THE EQUATOR
NEAR 34W TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 200 NM NORTH...AND 50 NM
SOUTH OF THE MONSOON TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

A DIURNALLY DRIVEN SURFACE TROUGH NORTHWEST OF THE YUCATAN
EXTENDS FROM 25N88W TO 20N92W. SE WINDS UP TO 25 KT ARE SE OF
THE TROUGH AXIS. NO CONVECTION IS NOTED WITH THIS TROUGH.
ELSEWHERE...SOUTHWESTERLY FLOW OF 15 TO 20 KT IS OCCURRING OVER
THE NE GULF...WELL SOUTH OF A LOW PRESSURE SYSTEM OVER THE SE
US. S TO SE WINDS OF 10 TO 15 KT COVER THE REMAINDER OF THE
BASIN. GENERALLY FAIR WEATHER IS OCCURRING ACROSS THE GULF THIS
MORNING WITH THE LACK OF FORCING FROM ANY WEATHER SYSTEMS.
HOWEVER...CONVECTION IS EXPECTED TO INCREASE TONIGHT AND INTO
MONDAY ACROSS THE NORTHERN GULF AS A STORM SYSTEM DEVELOPS OVER
THE CENTRAL US AND MOVES TOWARD THE GULF STATES.

CARIBBEAN SEA...

A 1007 MB LOW OVER N COLOMBIA NEAR 9N75W SUPPORTS ISOLATED
MODERATE CONVECTION...SOME OF WHICH IS OVER THE SOUTHWEST
CARIBBEAN TO 12N BETWEEN THE COLOMBIA COAST AND 78W. THE
CONVECTION MAY LINGER ACROSS THIS PORTION OF THE BASIN THROUGH
THE MORNING. OTHERWISE...VERY DRY AND STABLE AIR ALOFT COVERS
THE REMAINDER OF THE BASIN WHICH INHIBITS DEEP CONVECTION.
ISOLATED SHOWERS IN THE TRADE WIND FLOW CAN BE EXPECTED OVER THE
GREATER AND LESSER ANTILLES. 10 TO 15 KT TRADE WINDS COVER MUCH
OF THE BASIN...EXCEPT FOR WINDS APPROACHING 25 KT WITHIN 100 NM
OF THE NORTHERN COAST OF COLOMBIA...AND WITHIN 100 NM NORTH OF
THE COAST OF HONDURAS FROM 84W TO 87W. LITTLE CHANGE IS EXPECTED
OVER THE NEXT 24 HOURS.

...HISPANIOLA...

ISOLATED SHOWERS OVER THE WESTERN HALF OF THE ISLAND MAY
CONTINUE THIS MORNING WITH FAIR WEATHER OVER THE EASTERN HALF OF
THE ISLAND. ISOLATED SHOWERS WILL BE POSSIBLE ACROSS THE ISLAND
THIS AFTERNOON...WITH LITTLE CHANGE EXPECTED FOR MONDAY.

ATLANTIC OCEAN...

THE MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS
LOW PRESSURE MOVING OFF THE NORTH CAROLINA COAST. FORCING
ASSOCIATED WITH THE LOW IS SUPPORTING CLUSTERS OF MODERATE TO
STRONG CONVECTION AND THUNDERSTORMS OVER OUR AREA OF DISCUSSION
NORTH OF 29N BETWEEN 70W AND 76W. THIS CONVECTION IS SPREADING
RAPIDLY EASTWARD THIS MORNING AND WILL AFFECT WATERS N OF 28N
EASTWARD TO 60 W THROUGH TODAY. WEAK HIGH PRESSURE OF 1014 MB IS
OVER THE WESTERN ATLC NEAR 27N63W AND IS DISSIPATING TODAY AS
THE SYSTEM EXITING THE US COAST MOVES EASTWARD. FARTHER EAST...A
LOW PRESSURE SYSTEM OVER THE NORTH CENTRAL ATLC SUPPORTS A COLD
FRONT THAT ENTERS OUR AREA OF DISCUSSION NEAR 32N49W TO 23N63W.
SCATTERED MODERATE CONVECTION IS FROM 29N TO 32N BETWEEN 47W AND
55W. A STATIONARY 1021 MB HIGH IS CENTERED NEAR 24N32W...WHILE A
1017 MB LOW IS CENTERED NEAR 29N24W. NO CONVECTION IS NOTED WITH
THIS LOW. OVER THE NEXT 24 HOURS CONVECTION WILL BE LIKELY OFF
THE NORTH FL COAST TO 60W AS A COLD FRONT APPROACHES THE REGION.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
LATTO


000
AXNT20 KNHC 261023
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
4N20W WHERE THE ITCZ BEGINS AND CONTINUES SOUTH OF THE EQUATOR
NEAR 34W TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 200 NM NORTH...AND 50 NM
SOUTH OF THE MONSOON TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

A DIURNALLY DRIVEN SURFACE TROUGH NORTHWEST OF THE YUCATAN
EXTENDS FROM 25N88W TO 20N92W. SE WINDS UP TO 25 KT ARE SE OF
THE TROUGH AXIS. NO CONVECTION IS NOTED WITH THIS TROUGH.
ELSEWHERE...SOUTHWESTERLY FLOW OF 15 TO 20 KT IS OCCURRING OVER
THE NE GULF...WELL SOUTH OF A LOW PRESSURE SYSTEM OVER THE SE
US. S TO SE WINDS OF 10 TO 15 KT COVER THE REMAINDER OF THE
BASIN. GENERALLY FAIR WEATHER IS OCCURRING ACROSS THE GULF THIS
MORNING WITH THE LACK OF FORCING FROM ANY WEATHER SYSTEMS.
HOWEVER...CONVECTION IS EXPECTED TO INCREASE TONIGHT AND INTO
MONDAY ACROSS THE NORTHERN GULF AS A STORM SYSTEM DEVELOPS OVER
THE CENTRAL US AND MOVES TOWARD THE GULF STATES.

CARIBBEAN SEA...

A 1007 MB LOW OVER N COLOMBIA NEAR 9N75W SUPPORTS ISOLATED
MODERATE CONVECTION...SOME OF WHICH IS OVER THE SOUTHWEST
CARIBBEAN TO 12N BETWEEN THE COLOMBIA COAST AND 78W. THE
CONVECTION MAY LINGER ACROSS THIS PORTION OF THE BASIN THROUGH
THE MORNING. OTHERWISE...VERY DRY AND STABLE AIR ALOFT COVERS
THE REMAINDER OF THE BASIN WHICH INHIBITS DEEP CONVECTION.
ISOLATED SHOWERS IN THE TRADE WIND FLOW CAN BE EXPECTED OVER THE
GREATER AND LESSER ANTILLES. 10 TO 15 KT TRADE WINDS COVER MUCH
OF THE BASIN...EXCEPT FOR WINDS APPROACHING 25 KT WITHIN 100 NM
OF THE NORTHERN COAST OF COLOMBIA...AND WITHIN 100 NM NORTH OF
THE COAST OF HONDURAS FROM 84W TO 87W. LITTLE CHANGE IS EXPECTED
OVER THE NEXT 24 HOURS.

...HISPANIOLA...

ISOLATED SHOWERS OVER THE WESTERN HALF OF THE ISLAND MAY
CONTINUE THIS MORNING WITH FAIR WEATHER OVER THE EASTERN HALF OF
THE ISLAND. ISOLATED SHOWERS WILL BE POSSIBLE ACROSS THE ISLAND
THIS AFTERNOON...WITH LITTLE CHANGE EXPECTED FOR MONDAY.

ATLANTIC OCEAN...

THE MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS
LOW PRESSURE MOVING OFF THE NORTH CAROLINA COAST. FORCING
ASSOCIATED WITH THE LOW IS SUPPORTING CLUSTERS OF MODERATE TO
STRONG CONVECTION AND THUNDERSTORMS OVER OUR AREA OF DISCUSSION
NORTH OF 29N BETWEEN 70W AND 76W. THIS CONVECTION IS SPREADING
RAPIDLY EASTWARD THIS MORNING AND WILL AFFECT WATERS N OF 28N
EASTWARD TO 60 W THROUGH TODAY. WEAK HIGH PRESSURE OF 1014 MB IS
OVER THE WESTERN ATLC NEAR 27N63W AND IS DISSIPATING TODAY AS
THE SYSTEM EXITING THE US COAST MOVES EASTWARD. FARTHER EAST...A
LOW PRESSURE SYSTEM OVER THE NORTH CENTRAL ATLC SUPPORTS A COLD
FRONT THAT ENTERS OUR AREA OF DISCUSSION NEAR 32N49W TO 23N63W.
SCATTERED MODERATE CONVECTION IS FROM 29N TO 32N BETWEEN 47W AND
55W. A STATIONARY 1021 MB HIGH IS CENTERED NEAR 24N32W...WHILE A
1017 MB LOW IS CENTERED NEAR 29N24W. NO CONVECTION IS NOTED WITH
THIS LOW. OVER THE NEXT 24 HOURS CONVECTION WILL BE LIKELY OFF
THE NORTH FL COAST TO 60W AS A COLD FRONT APPROACHES THE REGION.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
LATTO



000
AXNT20 KNHC 261023
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
4N20W WHERE THE ITCZ BEGINS AND CONTINUES SOUTH OF THE EQUATOR
NEAR 34W TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 200 NM NORTH...AND 50 NM
SOUTH OF THE MONSOON TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

A DIURNALLY DRIVEN SURFACE TROUGH NORTHWEST OF THE YUCATAN
EXTENDS FROM 25N88W TO 20N92W. SE WINDS UP TO 25 KT ARE SE OF
THE TROUGH AXIS. NO CONVECTION IS NOTED WITH THIS TROUGH.
ELSEWHERE...SOUTHWESTERLY FLOW OF 15 TO 20 KT IS OCCURRING OVER
THE NE GULF...WELL SOUTH OF A LOW PRESSURE SYSTEM OVER THE SE
US. S TO SE WINDS OF 10 TO 15 KT COVER THE REMAINDER OF THE
BASIN. GENERALLY FAIR WEATHER IS OCCURRING ACROSS THE GULF THIS
MORNING WITH THE LACK OF FORCING FROM ANY WEATHER SYSTEMS.
HOWEVER...CONVECTION IS EXPECTED TO INCREASE TONIGHT AND INTO
MONDAY ACROSS THE NORTHERN GULF AS A STORM SYSTEM DEVELOPS OVER
THE CENTRAL US AND MOVES TOWARD THE GULF STATES.

CARIBBEAN SEA...

A 1007 MB LOW OVER N COLOMBIA NEAR 9N75W SUPPORTS ISOLATED
MODERATE CONVECTION...SOME OF WHICH IS OVER THE SOUTHWEST
CARIBBEAN TO 12N BETWEEN THE COLOMBIA COAST AND 78W. THE
CONVECTION MAY LINGER ACROSS THIS PORTION OF THE BASIN THROUGH
THE MORNING. OTHERWISE...VERY DRY AND STABLE AIR ALOFT COVERS
THE REMAINDER OF THE BASIN WHICH INHIBITS DEEP CONVECTION.
ISOLATED SHOWERS IN THE TRADE WIND FLOW CAN BE EXPECTED OVER THE
GREATER AND LESSER ANTILLES. 10 TO 15 KT TRADE WINDS COVER MUCH
OF THE BASIN...EXCEPT FOR WINDS APPROACHING 25 KT WITHIN 100 NM
OF THE NORTHERN COAST OF COLOMBIA...AND WITHIN 100 NM NORTH OF
THE COAST OF HONDURAS FROM 84W TO 87W. LITTLE CHANGE IS EXPECTED
OVER THE NEXT 24 HOURS.

...HISPANIOLA...

ISOLATED SHOWERS OVER THE WESTERN HALF OF THE ISLAND MAY
CONTINUE THIS MORNING WITH FAIR WEATHER OVER THE EASTERN HALF OF
THE ISLAND. ISOLATED SHOWERS WILL BE POSSIBLE ACROSS THE ISLAND
THIS AFTERNOON...WITH LITTLE CHANGE EXPECTED FOR MONDAY.

ATLANTIC OCEAN...

THE MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS
LOW PRESSURE MOVING OFF THE NORTH CAROLINA COAST. FORCING
ASSOCIATED WITH THE LOW IS SUPPORTING CLUSTERS OF MODERATE TO
STRONG CONVECTION AND THUNDERSTORMS OVER OUR AREA OF DISCUSSION
NORTH OF 29N BETWEEN 70W AND 76W. THIS CONVECTION IS SPREADING
RAPIDLY EASTWARD THIS MORNING AND WILL AFFECT WATERS N OF 28N
EASTWARD TO 60 W THROUGH TODAY. WEAK HIGH PRESSURE OF 1014 MB IS
OVER THE WESTERN ATLC NEAR 27N63W AND IS DISSIPATING TODAY AS
THE SYSTEM EXITING THE US COAST MOVES EASTWARD. FARTHER EAST...A
LOW PRESSURE SYSTEM OVER THE NORTH CENTRAL ATLC SUPPORTS A COLD
FRONT THAT ENTERS OUR AREA OF DISCUSSION NEAR 32N49W TO 23N63W.
SCATTERED MODERATE CONVECTION IS FROM 29N TO 32N BETWEEN 47W AND
55W. A STATIONARY 1021 MB HIGH IS CENTERED NEAR 24N32W...WHILE A
1017 MB LOW IS CENTERED NEAR 29N24W. NO CONVECTION IS NOTED WITH
THIS LOW. OVER THE NEXT 24 HOURS CONVECTION WILL BE LIKELY OFF
THE NORTH FL COAST TO 60W AS A COLD FRONT APPROACHES THE REGION.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
LATTO


000
AXPZ20 KNHC 260920
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 07N93W TO 04N104W TO 06N114W TO 05N122W
TO 08N129W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG
CONVECTION WITHIN 120 NM S OF AXIS BETWEEN 103W AND 110W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 04N TO 09N
BETWEEN 123W AND 128W.

...DISCUSSION...

A BROAD LONG WAVE TROUGH DOMINATES MID-UPPER LEVELS N OF 15N W
OF 110W. A SHORT WAVE TROUGH IS EVIDENT ON WATER VAPOR IMAGERY
FROM CENTRAL ARIZONA W-SW TO 26N118W TO 25N135W. A COLD FRONT IS
MOVING S ALONG THE COAST OF SOUTHERN CALIFORNIA.

NEARLY STATIONARY SUBTROPICAL RIDGE ANCHORED BY 1027 MB HIGH
CENTERED NEAR 31N135W EXTENDS ACROSS MOST OF THE DISCUSSION AREA
N OF 16N W OF 114W. SCATTEROMETER DATA CONTINUES TO SHOW AN AREA
OF FRESH TO STRONG NE WINDS BETWEEN 11N-20N W OF 125W. WIND
WAVES GENERATED BY THE ENHANCED TRADES ARE SUPPORTING 8-10 FT
COMBINED SEAS IN WESTERN WATERS N OF THE ITCZ.

SCATTEROMETER DATA ALSO SHOWS FRESH TO STRONG NW WINDS ALONG THE
BAJA CALIFORNIA COAST. FRESH NW SWELL WILL SWEEP S OF 30N W OF
124W TODAY THROUGH MON...WITH SEA HEIGHTS PEAKING AT 10-11 FT
TONIGHT. EXTREME NORTHERN GULF OF CALIFORNIA CAN EXPECT 20-25 KT
W-SW WINDS FOR A FEW HOURS THIS MORNING.

$$
MUNDELL


000
AXPZ20 KNHC 260920
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 07N93W TO 04N104W TO 06N114W TO 05N122W
TO 08N129W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG
CONVECTION WITHIN 120 NM S OF AXIS BETWEEN 103W AND 110W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 04N TO 09N
BETWEEN 123W AND 128W.

...DISCUSSION...

A BROAD LONG WAVE TROUGH DOMINATES MID-UPPER LEVELS N OF 15N W
OF 110W. A SHORT WAVE TROUGH IS EVIDENT ON WATER VAPOR IMAGERY
FROM CENTRAL ARIZONA W-SW TO 26N118W TO 25N135W. A COLD FRONT IS
MOVING S ALONG THE COAST OF SOUTHERN CALIFORNIA.

NEARLY STATIONARY SUBTROPICAL RIDGE ANCHORED BY 1027 MB HIGH
CENTERED NEAR 31N135W EXTENDS ACROSS MOST OF THE DISCUSSION AREA
N OF 16N W OF 114W. SCATTEROMETER DATA CONTINUES TO SHOW AN AREA
OF FRESH TO STRONG NE WINDS BETWEEN 11N-20N W OF 125W. WIND
WAVES GENERATED BY THE ENHANCED TRADES ARE SUPPORTING 8-10 FT
COMBINED SEAS IN WESTERN WATERS N OF THE ITCZ.

SCATTEROMETER DATA ALSO SHOWS FRESH TO STRONG NW WINDS ALONG THE
BAJA CALIFORNIA COAST. FRESH NW SWELL WILL SWEEP S OF 30N W OF
124W TODAY THROUGH MON...WITH SEA HEIGHTS PEAKING AT 10-11 FT
TONIGHT. EXTREME NORTHERN GULF OF CALIFORNIA CAN EXPECT 20-25 KT
W-SW WINDS FOR A FEW HOURS THIS MORNING.

$$
MUNDELL



000
AXNT20 KNHC 260542
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
4N22W WHERE THE ITCZ BEGINS AND CONTINUES SOUTH OF THE EQUATOR
NEAR 35W TO THE NORTHERN COAST OF BRAZIL NEAR 02S45W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 125 NM OF EITHER SIDE OF
THE MONSOON TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

AN MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS A
LOW PRESSURE SYSTEM OVER THE SOUTHEASTERN US. A SURFACE TROUGH
TRAILS SOUTHWEST OF THIS LOW AND RESIDES OVER THE NORTHEASTERN
GULF FROM NEAR APALACHICOLA TO 29N86W TO 27N91W. CONVECTION HAS
WEAKENED IN THE VICINITY OF THIS TROUGH TONIGHT.
HOWEVER...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS REMAIN
POSSIBLE THROUGH THE REMAINDER OF TONIGHT WITHIN 75 NM OF EITHER
SIDE OF THE TROUGH AXIS. CONVECTION OVER MEXICO ASSOCIATED WITH
THE SUBTROPICAL JET IS NEARING THE SHORELINE ALONG THE WESTERN
GULF. THIS ISOLATED MODERATE CONVECTION MAY AFFECT WATERS FROM
21N TO 23N BETWEEN 95W AND THE COAST OF MEXICO EARLY THIS
MORNING. GENERALLY FAIR WEATHER COVERS THE REMAINDER OF THE
BASIN WITH ANTICYCLONIC FLOW OF 10 TO 15 KT AROUND WEAK WESTERN
ATLC HIGH PRESSURE. MODELS ARE FORECASTING SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS ACROSS THE NORTHERN GULF TODAY WITH A
FURTHER INCREASE IN CONVECTION ACROSS THE NORTHERN GULF INTO
MONDAY AS A COLD FRONT APPROACHES THE AREA.

CARIBBEAN SEA...

A 1006 MB LOW OVER N COLOMBIA NEAR 9N74W SUPPORTS WIDELY
SCATTERED MODERATE CONVECTION...SOME OF WHICH HAS ENTERED THE
SOUTHWEST CARIBBEAN TO 11N BETWEEN THE COLOMBIA COAST AND 78W.
THIS CONVECTION SHOULD GRADUALLY DIMINISH OVERNIGHT.
OTHERWISE...VERY DRY AND STABLE AIR ALOFT COVERS THE REMAINDER
OF THE BASIN WHICH INHIBITS DEEP CONVECTION. ISOLATED SHOWERS IN
THE TRADE WIND FLOW CAN BE EXPECTED OVER THE GREATER AND LESSER
ANTILLES. 10 TO 15 KT TRADE WINDS COVER MUCH OF THE
BASIN...EXCEPT FOR WINDS APPROACHING 25 KT WITHIN 100 NM OF THE
NORTHERN COAST OF COLOMBIA...AND WITHIN 100 NM NORTH OF THE
COAST OF HONDURAS FROM 85W TO 87W. LITTLE CHANGE IS EXPECTED
OVER THE NEXT 24 HOURS.

...HISPANIOLA...

ISOLATED TO SCATTERED SHOWERS OVER THE WESTERN HALF OF THE
ISLAND MAY CONTINUE OVERNIGHT WITH FAIR WEATHER OVER THE EASTERN
HALF OF THE ISLAND. ISOLATED SHOWERS WILL BE POSSIBLE ACROSS THE
ISLAND ON SUNDAY...WITH LITTLE CHANGE EXPECTED FOR MONDAY.

ATLANTIC OCEAN...

THE MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS
LOW PRESSURE OVER NORTH CAROLINA WITH A SURFACE TROUGH MOVING
OFFSHORE OVER THE SOUTHWEST NORTHERN ATLC WATERS. CLUSTERS OF
MODERATE CONVECTION AND THUNDERSTORMS ASSOCIATED WITH THE
SURFACE TROUGH AND LOW EXTENDS OVER OUR AREA OF DISCUSSION NORTH
OF 30N BETWEEN 75W AND 79W. THIS CONVECTION IS SPREADING RAPIDLY
EASTWARD EARLY THIS MORNING AND WILL AFFECT WATERS N OF 30N
EASTWARD TO 70 W THROUGH THE MORNING. WEAK HIGH PRESSURE OF 1015
MB IS OVER THE WESTERN ATLC NEAR 30N68W AND IS DISSIPATING TODAY
AS THE SYSTEM EXITING THE US COAST MOVES EASTWARD. FARTHER
EAST...A LOW PRESSURE SYSTEM OVER THE NORTH CENTRAL ATLC
SUPPORTS A COLD FRONT THAT ENTERS OUR AREA OF DISCUSSION NEAR
32N51W TO 24N66W. SCATTERED MODERATE CONVECTION IS WITHIN 75 NM
SE OF THE COLD FRONT N OF 28N. SHOWERS ARE POSSIBLE ALONG AND
WITHIN 100 NM SE OF THE REMAINDER OF THE FRONT. A STATIONARY
1022MB HIGH IS CENTERED NEAR 24N33W...WHILE A 1017 MB LOW IS
CENTERED NEAR 29N26W. NO CONVECTION IS NOTED WITH THIS LOW. OVER
THE NEXT 24 HOURS CONVECTION OFF THE EASTERN US WILL SPREAD
EASTWARD TO 60W. ON MONDAY...A COLD FRONT WILL MOVE OVER THE
ATLC OFF THE COAST OF NORTH FLORIDA WITH CONVECTION.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
LATTO



000
AXNT20 KNHC 260542
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 8N13W TO
4N22W WHERE THE ITCZ BEGINS AND CONTINUES SOUTH OF THE EQUATOR
NEAR 35W TO THE NORTHERN COAST OF BRAZIL NEAR 02S45W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 125 NM OF EITHER SIDE OF
THE MONSOON TROUGH AND ITCZ.

...DISCUSSION...

GULF OF MEXICO...

AN MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS A
LOW PRESSURE SYSTEM OVER THE SOUTHEASTERN US. A SURFACE TROUGH
TRAILS SOUTHWEST OF THIS LOW AND RESIDES OVER THE NORTHEASTERN
GULF FROM NEAR APALACHICOLA TO 29N86W TO 27N91W. CONVECTION HAS
WEAKENED IN THE VICINITY OF THIS TROUGH TONIGHT.
HOWEVER...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS REMAIN
POSSIBLE THROUGH THE REMAINDER OF TONIGHT WITHIN 75 NM OF EITHER
SIDE OF THE TROUGH AXIS. CONVECTION OVER MEXICO ASSOCIATED WITH
THE SUBTROPICAL JET IS NEARING THE SHORELINE ALONG THE WESTERN
GULF. THIS ISOLATED MODERATE CONVECTION MAY AFFECT WATERS FROM
21N TO 23N BETWEEN 95W AND THE COAST OF MEXICO EARLY THIS
MORNING. GENERALLY FAIR WEATHER COVERS THE REMAINDER OF THE
BASIN WITH ANTICYCLONIC FLOW OF 10 TO 15 KT AROUND WEAK WESTERN
ATLC HIGH PRESSURE. MODELS ARE FORECASTING SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS ACROSS THE NORTHERN GULF TODAY WITH A
FURTHER INCREASE IN CONVECTION ACROSS THE NORTHERN GULF INTO
MONDAY AS A COLD FRONT APPROACHES THE AREA.

CARIBBEAN SEA...

A 1006 MB LOW OVER N COLOMBIA NEAR 9N74W SUPPORTS WIDELY
SCATTERED MODERATE CONVECTION...SOME OF WHICH HAS ENTERED THE
SOUTHWEST CARIBBEAN TO 11N BETWEEN THE COLOMBIA COAST AND 78W.
THIS CONVECTION SHOULD GRADUALLY DIMINISH OVERNIGHT.
OTHERWISE...VERY DRY AND STABLE AIR ALOFT COVERS THE REMAINDER
OF THE BASIN WHICH INHIBITS DEEP CONVECTION. ISOLATED SHOWERS IN
THE TRADE WIND FLOW CAN BE EXPECTED OVER THE GREATER AND LESSER
ANTILLES. 10 TO 15 KT TRADE WINDS COVER MUCH OF THE
BASIN...EXCEPT FOR WINDS APPROACHING 25 KT WITHIN 100 NM OF THE
NORTHERN COAST OF COLOMBIA...AND WITHIN 100 NM NORTH OF THE
COAST OF HONDURAS FROM 85W TO 87W. LITTLE CHANGE IS EXPECTED
OVER THE NEXT 24 HOURS.

...HISPANIOLA...

ISOLATED TO SCATTERED SHOWERS OVER THE WESTERN HALF OF THE
ISLAND MAY CONTINUE OVERNIGHT WITH FAIR WEATHER OVER THE EASTERN
HALF OF THE ISLAND. ISOLATED SHOWERS WILL BE POSSIBLE ACROSS THE
ISLAND ON SUNDAY...WITH LITTLE CHANGE EXPECTED FOR MONDAY.

ATLANTIC OCEAN...

THE MIDDLE TO UPPER LEVEL TROUGH OVER THE OHIO VALLEY SUPPORTS
LOW PRESSURE OVER NORTH CAROLINA WITH A SURFACE TROUGH MOVING
OFFSHORE OVER THE SOUTHWEST NORTHERN ATLC WATERS. CLUSTERS OF
MODERATE CONVECTION AND THUNDERSTORMS ASSOCIATED WITH THE
SURFACE TROUGH AND LOW EXTENDS OVER OUR AREA OF DISCUSSION NORTH
OF 30N BETWEEN 75W AND 79W. THIS CONVECTION IS SPREADING RAPIDLY
EASTWARD EARLY THIS MORNING AND WILL AFFECT WATERS N OF 30N
EASTWARD TO 70 W THROUGH THE MORNING. WEAK HIGH PRESSURE OF 1015
MB IS OVER THE WESTERN ATLC NEAR 30N68W AND IS DISSIPATING TODAY
AS THE SYSTEM EXITING THE US COAST MOVES EASTWARD. FARTHER
EAST...A LOW PRESSURE SYSTEM OVER THE NORTH CENTRAL ATLC
SUPPORTS A COLD FRONT THAT ENTERS OUR AREA OF DISCUSSION NEAR
32N51W TO 24N66W. SCATTERED MODERATE CONVECTION IS WITHIN 75 NM
SE OF THE COLD FRONT N OF 28N. SHOWERS ARE POSSIBLE ALONG AND
WITHIN 100 NM SE OF THE REMAINDER OF THE FRONT. A STATIONARY
1022MB HIGH IS CENTERED NEAR 24N33W...WHILE A 1017 MB LOW IS
CENTERED NEAR 29N26W. NO CONVECTION IS NOTED WITH THIS LOW. OVER
THE NEXT 24 HOURS CONVECTION OFF THE EASTERN US WILL SPREAD
EASTWARD TO 60W. ON MONDAY...A COLD FRONT WILL MOVE OVER THE
ATLC OFF THE COAST OF NORTH FLORIDA WITH CONVECTION.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
LATTO


000
AXPZ20 KNHC 260232
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 07N90W TO 07N111W THEN RESUMES
FROM 06N115W TO 07N126W THEN RESUMES FROM 07N130W TO 06N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 150 NM S OF THE AXIS W
OF 133W. ALSO...SCATTERED MODERATE CONVECTION IS FROM 06N TO 08N
BETWEEN 83W AND 86W UNDER AN AREA OF UPPER LEVEL DIFFLUENCE.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH IS DIVING SOUTHWARD INTO THE
NORTHERN DISCUSSION WATERS FROM 32N113W TO 26N126W TO 26N140W.
DRY AND STABLE AIR IS PUSHING IN IMMEDIATELY BEHIND THE TROUGH
WHILE A NARROW BAND OF MOISTURE EXISTS WITHIN 90-120 NM SE OF
THE TROUGH. THIS FEATURE IS SUPPORTING A SURFACE COLD FRONT
WHICH IS MOVING THROUGH SOUTHERN U.S. CALIFORNIA. NORTHWEST TO
NORTH WINDS WILL INCREASE TO GALE FORCE OFFSHORE OF CALIFORNIA
AROUND POINT CONCEPTION WITHIN THE NEXT 24 HOURS. THESE WINDS
WILL BUILD FRESH NORTHERLY SWELL TO 8-11 FT N OF 25N BETWEEN
BAJA CALIFORNIA AND 125W LATE TONIGHT WHICH WILL PERSIST THROUGH
48 HOURS. ASSOCIATED FRESH TO STRONG NORTHERLY WINDS WILL DIP
SOUTHWARD TO 25N BY SUN NIGHT BEFORE DIMINISHING BY MON EVENING.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N139W WITH A
RIDGE AXIS EXTENDING TO THE SE OF THE HIGH THROUGH 30N129W TO
17N105W. THE PRESSURE GRADIENT SW OF THE RIDGING AND N OF THE
LOWER PRESSURES ALONG THE ITCZ IS SUPPORTING FRESH TO STRONG
TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N111W TO 04N113W WITH SCATTERED
MODERATE CONVECTION FROM 10N TO 14N BETWEEN 109W AND 113W. THE
WESTERN TROUGH EXTENDS FROM 11N126W TO 06N128W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM 06N TO 11N BETWEEN
122W AND 127W...AND ALSO FROM 06N TO 10N BETWEEN 127W AND 132W.
THE AREA OF TRADES WILL DIMINISH TO LESS THAN 20 KT BY 48 HOURS
AS THE PRESSURE GRADIENT ACROSS THE REGION WEAKENS.

GULF OF CALIFORNIA...A COLD FRONT CURRENTLY MOVING THROUGH
SOUTHERN U.S. CALIFORNIA WILL ENTER THE FAR NORTHERN GULF OF
CALIFORNIA LATER TONIGHT. SOUTHWESTERLY TO WESTERLY WINDS WILL
INCREASE TO 20-30 KT N OF 29.5N AHEAD OF THE FRONT LATER TONIGHT
WITH FRESH TO STRONG NORTHERLY WINDS ARRIVING BEHIND IT. WINDS
WILL DIMINISH JUST PRIOR TO SUNRISE SUN AS THE FRONT WEAKENS.

E OF 110W...SCATTEROMETER DATA INDICATES THAT WINDS ARE MAINLY
LIGHT TO MODERATE WHILE ALTIMETER DATA SAMPLED 4-7 FT SEAS.
LIGHT TO MODERATE S-SW WINDS WILL PREVAIL IN THE GULF OF
TEHUANTEPEC WHILE WINDS WILL PULSE TO MODERATE TO FRESH IN THE
GULF OF PAPAGAYO AND PANAMA DURING THE LATE NIGHT AND EARLY
MORNING HOURS.

$$
LEWITSKY


000
AXPZ20 KNHC 260232
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 07N90W TO 07N111W THEN RESUMES
FROM 06N115W TO 07N126W THEN RESUMES FROM 07N130W TO 06N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 150 NM S OF THE AXIS W
OF 133W. ALSO...SCATTERED MODERATE CONVECTION IS FROM 06N TO 08N
BETWEEN 83W AND 86W UNDER AN AREA OF UPPER LEVEL DIFFLUENCE.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH IS DIVING SOUTHWARD INTO THE
NORTHERN DISCUSSION WATERS FROM 32N113W TO 26N126W TO 26N140W.
DRY AND STABLE AIR IS PUSHING IN IMMEDIATELY BEHIND THE TROUGH
WHILE A NARROW BAND OF MOISTURE EXISTS WITHIN 90-120 NM SE OF
THE TROUGH. THIS FEATURE IS SUPPORTING A SURFACE COLD FRONT
WHICH IS MOVING THROUGH SOUTHERN U.S. CALIFORNIA. NORTHWEST TO
NORTH WINDS WILL INCREASE TO GALE FORCE OFFSHORE OF CALIFORNIA
AROUND POINT CONCEPTION WITHIN THE NEXT 24 HOURS. THESE WINDS
WILL BUILD FRESH NORTHERLY SWELL TO 8-11 FT N OF 25N BETWEEN
BAJA CALIFORNIA AND 125W LATE TONIGHT WHICH WILL PERSIST THROUGH
48 HOURS. ASSOCIATED FRESH TO STRONG NORTHERLY WINDS WILL DIP
SOUTHWARD TO 25N BY SUN NIGHT BEFORE DIMINISHING BY MON EVENING.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N139W WITH A
RIDGE AXIS EXTENDING TO THE SE OF THE HIGH THROUGH 30N129W TO
17N105W. THE PRESSURE GRADIENT SW OF THE RIDGING AND N OF THE
LOWER PRESSURES ALONG THE ITCZ IS SUPPORTING FRESH TO STRONG
TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N111W TO 04N113W WITH SCATTERED
MODERATE CONVECTION FROM 10N TO 14N BETWEEN 109W AND 113W. THE
WESTERN TROUGH EXTENDS FROM 11N126W TO 06N128W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM 06N TO 11N BETWEEN
122W AND 127W...AND ALSO FROM 06N TO 10N BETWEEN 127W AND 132W.
THE AREA OF TRADES WILL DIMINISH TO LESS THAN 20 KT BY 48 HOURS
AS THE PRESSURE GRADIENT ACROSS THE REGION WEAKENS.

GULF OF CALIFORNIA...A COLD FRONT CURRENTLY MOVING THROUGH
SOUTHERN U.S. CALIFORNIA WILL ENTER THE FAR NORTHERN GULF OF
CALIFORNIA LATER TONIGHT. SOUTHWESTERLY TO WESTERLY WINDS WILL
INCREASE TO 20-30 KT N OF 29.5N AHEAD OF THE FRONT LATER TONIGHT
WITH FRESH TO STRONG NORTHERLY WINDS ARRIVING BEHIND IT. WINDS
WILL DIMINISH JUST PRIOR TO SUNRISE SUN AS THE FRONT WEAKENS.

E OF 110W...SCATTEROMETER DATA INDICATES THAT WINDS ARE MAINLY
LIGHT TO MODERATE WHILE ALTIMETER DATA SAMPLED 4-7 FT SEAS.
LIGHT TO MODERATE S-SW WINDS WILL PREVAIL IN THE GULF OF
TEHUANTEPEC WHILE WINDS WILL PULSE TO MODERATE TO FRESH IN THE
GULF OF PAPAGAYO AND PANAMA DURING THE LATE NIGHT AND EARLY
MORNING HOURS.

$$
LEWITSKY



000
AXPZ20 KNHC 260232
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN APR 26 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 07N90W TO 07N111W THEN RESUMES
FROM 06N115W TO 07N126W THEN RESUMES FROM 07N130W TO 06N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 150 NM S OF THE AXIS W
OF 133W. ALSO...SCATTERED MODERATE CONVECTION IS FROM 06N TO 08N
BETWEEN 83W AND 86W UNDER AN AREA OF UPPER LEVEL DIFFLUENCE.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH IS DIVING SOUTHWARD INTO THE
NORTHERN DISCUSSION WATERS FROM 32N113W TO 26N126W TO 26N140W.
DRY AND STABLE AIR IS PUSHING IN IMMEDIATELY BEHIND THE TROUGH
WHILE A NARROW BAND OF MOISTURE EXISTS WITHIN 90-120 NM SE OF
THE TROUGH. THIS FEATURE IS SUPPORTING A SURFACE COLD FRONT
WHICH IS MOVING THROUGH SOUTHERN U.S. CALIFORNIA. NORTHWEST TO
NORTH WINDS WILL INCREASE TO GALE FORCE OFFSHORE OF CALIFORNIA
AROUND POINT CONCEPTION WITHIN THE NEXT 24 HOURS. THESE WINDS
WILL BUILD FRESH NORTHERLY SWELL TO 8-11 FT N OF 25N BETWEEN
BAJA CALIFORNIA AND 125W LATE TONIGHT WHICH WILL PERSIST THROUGH
48 HOURS. ASSOCIATED FRESH TO STRONG NORTHERLY WINDS WILL DIP
SOUTHWARD TO 25N BY SUN NIGHT BEFORE DIMINISHING BY MON EVENING.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 32N139W WITH A
RIDGE AXIS EXTENDING TO THE SE OF THE HIGH THROUGH 30N129W TO
17N105W. THE PRESSURE GRADIENT SW OF THE RIDGING AND N OF THE
LOWER PRESSURES ALONG THE ITCZ IS SUPPORTING FRESH TO STRONG
TRADES BETWEEN THE TWO FEATURES.

A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ WITH THE
EASTERN TROUGH EXTENDING FROM 12N111W TO 04N113W WITH SCATTERED
MODERATE CONVECTION FROM 10N TO 14N BETWEEN 109W AND 113W. THE
WESTERN TROUGH EXTENDS FROM 11N126W TO 06N128W WITH SCATTERED
MODERATE AND ISOLATED STRONG CONVECTION FROM 06N TO 11N BETWEEN
122W AND 127W...AND ALSO FROM 06N TO 10N BETWEEN 127W AND 132W.
THE AREA OF TRADES WILL DIMINISH TO LESS THAN 20 KT BY 48 HOURS
AS THE PRESSURE GRADIENT ACROSS THE REGION WEAKENS.

GULF OF CALIFORNIA...A COLD FRONT CURRENTLY MOVING THROUGH
SOUTHERN U.S. CALIFORNIA WILL ENTER THE FAR NORTHERN GULF OF
CALIFORNIA LATER TONIGHT. SOUTHWESTERLY TO WESTERLY WINDS WILL
INCREASE TO 20-30 KT N OF 29.5N AHEAD OF THE FRONT LATER TONIGHT
WITH FRESH TO STRONG NORTHERLY WINDS ARRIVING BEHIND IT. WINDS
WILL DIMINISH JUST PRIOR TO SUNRISE SUN AS THE FRONT WEAKENS.

E OF 110W...SCATTEROMETER DATA INDICATES THAT WINDS ARE MAINLY
LIGHT TO MODERATE WHILE ALTIMETER DATA SAMPLED 4-7 FT SEAS.
LIGHT TO MODERATE S-SW WINDS WILL PREVAIL IN THE GULF OF
TEHUANTEPEC WHILE WINDS WILL PULSE TO MODERATE TO FRESH IN THE
GULF OF PAPAGAYO AND PANAMA DURING THE LATE NIGHT AND EARLY
MORNING HOURS.

$$
LEWITSKY


000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA


000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA



000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA



000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA



000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA



000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA



000
AXPZ20 KNHC 252128
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 08N89W TO 08N111W THEN RESUMES FROM
06N115W TO 08N125W THEN RESUMES FROM 07N127W TO 06N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 120 NM EITHER SIDE OF
THE AXIS W OF 127W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH IS DIVING SOUTHWARD INTO THE
NORTHERN DISCUSSION WATERS FROM 32N115W TO 27N125W TO 26N140W.
DRY AND STABLE AIR IS PUSHING IN BEHIND THE TROUGH WHILE A
NARROW BAND OF MOISTURE EXISTS WITHIN 120 NM SE OF THE TROUGH.
THIS FEATURE IS SUPPORTING A SURFACE COLD FRONT WHICH IS MOVING
THROUGH SOUTHERN U.S. CALIFORNIA. NORTHWEST TO NORTH WINDS WILL
INCREASE TO GALE FORCE OFFSHORE OF CALIFORNIA AROUND POINT
CONCEPTION WITHIN THE NEXT 24 HOURS. THESE WINDS WILL BUILD
FRESH NORTHERLY SWELL TO 8-10 FT N OF 27N BETWEEN BAJA
CALIFORNIA AND 125W LATE TONIGHT WHICH WILL PERSIST THROUGH 48
HOURS. ASSOCIATED FRESH TO STRONG NORTHERLY WINDS WILL DIP
SOUTHWARD TO 28N BY LATE SUN NIGHT BEFORE DIMINISHING BY MON
AFTERNOON.

A 1027 MB SURFACE HIGH CENTER IS LOCATED NEAR 31N139W WITH A
RIDGE AXIS EXTENDING TO THE SE OF THE HIGH THROUGH 28N125W TO
19N104W. THE PRESSURE GRADIENT SW OF THE RIDGING AND N OF THE
LOWER PRESSURES ALONG THE ITCZ IS SUPPORTING FRESH TO STRONG
TRADES BETWEEN THE TWO FEATURES.

IN ADDITION...A PAIR OF SURFACE TROUGHS ARE EMBEDDED IN THE ITCZ
WITH THE EASTERN TROUGH EXTENDING FROM 13N108W TO 06N113W AND
ASSOCIATED SCATTERED MODERATE CONVECTION IS FROM 12N TO 14N
BETWEEN 107W AND 112W. THE WESTERN TROUGH REACHES FROM 12N123W
TO 07N127W WITH SCATTERED MODERATE CONVECTION FROM 08N TO 10N
BETWEEN 121W AND 126W. THE AREA OF TRADES WILL DIMINISH TO LESS
THAN 20 KT BY 48 HOURS AS THE PRESSURE GRADIENT ACROSS THE
REGION WEAKENS.

GULF OF CALIFORNIA...A COLD FRONT CURRENTLY MOVING INTO SOUTHERN
U.S. CALIFORNIA WILL ENTER THE FAR NORTHERN GULF OF CALIFORNIA
LATE TONIGHT. SOUTHWESTERLY TO WESTERLY WINDS WILL INCREASE TO
20-30 KT N OF 29.5N AHEAD OF THE FRONT LATE TONIGHT WITH FRESH
TO STRONG NORTHERLY WINDS ARRIVING BEHIND IT. WINDS WILL
DIMINISH JUST PRIOR TO SUNRISE SUN AS THE FRONT WEAKENS.

E OF 110W...SCATTEROMETER DATA INDICATES THAT WINDS ARE MAINLY
LIGHT TO MODERATE WHILE ALTIMETER DATA SAMPLED 4-7 FT SEAS.
LIGHT TO MODERATE S-SW WINDS WILL PREVAIL IN THE GULF OF
TEHUANTEPEC WHILE WINDS WILL PULSE TO MODERATE TO FRESH IN THE
GULF OF PAPAGAYO AND PANAMA DURING THE LATE NIGHT AND EARLY
MORNING HOURS.

$$
LEWITSKY


000
AXNT20 KNHC 251738
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1700 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 14N17W TO
05N21W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
05N21W TO THE EQUATOR NEAR 38W. SCATTERED MODERATE CONVECTION IS
FROM 05N-07N BETWEEN 11W-16W...AND FROM THE EQUATOR TO 03N
BETWEEN 45W-52W.

...DISCUSSION...

GULF OF MEXICO...
UPPER LEVEL SOUTHWESTERLY FLOW ALOFT INFLUENCES MUCH OF THE GULF
BASIN THIS AFTERNOON WITH A MID-LEVEL SHORTWAVE TROUGH NOTED ON
WATER VAPOR IMAGERY PROGRESSING NORTHEASTWARD OVER LOUISIANA
NEAR 31N92W. WHILE NO SIGNIFICANT SURFACE FEATURE IS PRESENT
ACROSS THE WESTERN GULF WATERS OR PORTIONS OF COASTAL TEXAS...A
BROAD AREA OF LOWER PRESSURE VALUES EXISTS ACROSS THE NW AND
WEST-CENTRAL GULF WATERS. THE MID-LEVEL DYNAMICS IN PLACE OVER
LOUISIANA ARE GENERATING AN AREA OF SCATTERED SHOWERS AND TSTMS
N OF 28N BETWEEN 91W-97W...INCLUDING INLAND PORTIONS OF SE TEXAS
AND LOUISIANA. THIS MID-LEVEL ENERGY IS EXPECTED TO CONTINUE
ROUNDING AN UPPER LEVEL RIDGE ANCHORED OVER THE WESTERN
CARIBBEAN SEA NEAR 18N80W. SOUTHERLY GENTLE TO MODERATE BREEZE
CONDITIONS ARE EXPECTED TO PERSIST THROUGH MONDAY AS AN AREA OF
LOW PRESSURE DEVELOPS ACROSS THE SOUTHERN PLAINS WHICH WILL
INTRODUCE A FRONTAL BOUNDARY FORECAST TO EMERGE OFF THE TEXAS
AND LOUISIANA COASTS EARLY MONDAY AND QUICKLY LIFT NORTHWARD BY
LATE MONDAY. THE LOW PRESSURE AREA IS EXPECTED TO WEAKEN WITH A
SECONDARY FRONT TO EMERGE OFF THE NW GULF COAST EARLY TUESDAY.
STRONGER NORTHERLY WINDS ARE ANTICIPATED BEHIND THIS SECONDARY
COLD FRONT ACROSS THE WESTERN GULF WATERS BEGINNING LATE TUESDAY
THROUGH EARLY THURSDAY.

CARIBBEAN SEA...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER THE
WESTERN CARIBBEAN NEAR 18N80W WITH THE BASIN E OF 78W UNDER THE
INFLUENCE OF NORTHERLY FLOW ALOFT ON THE EASTERN PERIPHERY OF
THE RIDGING. WATER VAPOR IMAGERY INDICATES THE ENTIRE
CIRCULATION REMAINS VERY DRY WITH STRONG SUBSIDENCE RESULTING IN
MOSTLY CLEAR SKIES AND FAIR CONDITIONS ACROSS THE CARIBBEAN
WATERS THIS AFTERNOON. WHILE AN OVERALL WEAK PRESSURE GRADIENT
CONTINUES TO MAINTAIN MODERATE TO FRESH BREEZE CONDITIONS...
SLIGHTLY STRONGER BREEZE CONDITIONS ARE EXPECTED WITHIN CLOSE
PROXIMITY TO THE COAST OF COLOMBIA AND IN THE GULF OF HONDURAS.
OTHERWISE...A SURFACE RIDGE AXIS EXTENDS ALONG 20N FROM THE
CENTRAL ATLC TO 75W PROVIDING FOR VERY SIMILAR TRANQUIL SYNOPTIC
CONDITIONS EXPECTED THROUGH EARLY TUESDAY.

...HISPANIOLA...
CURRENTLY MOSTLY CLEAR SKIES PREVAIL UNDER STRONG SUBSIDENCE
WITHIN DRY AIR ALOFT. THESE OVERALL CONDITIONS ARE EXPECTED TO
PERSIST THE NEXT FEW DAYS AS A SURFACE RIDGE AXIS EXTENDS ALONG
20N FROM THE CENTRAL ATLC TO 75W.

ATLANTIC OCEAN...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OFF THE COAST OF
NEW ENGLAND NEAR 43N66W WITH SHORTWAVE ENERGY ON THE
SOUTHEASTERN PERIPHERY OF THE CYCLONE IN THE VICINITY OF 36N58W.
GIVEN THE DYNAMICS IN PLACE...THEY SUPPORT A COLD FRONT ANALYZED
INTO THE DISCUSSION AREA NEAR 32N57W TO 26N73W. THE FRONT
REMAINS RELATIVELY DRY AS UPPER LEVEL NORTHWESTERLY FLOW
PREVAILS OVER THE SW NORTH ATLC...HOWEVER ISOLATED SHOWERS AND
TSTMS ARE OCCURRING N OF 30N BETWEEN 51W-57W. FURTHERMORE...TO
THE SOUTHEAST...MIDDLE TO UPPER LEVEL SHORTWAVE ENERGY NOTED ON
WATER VAPOR IMAGERY NEAR 28N51W SUPPORTS A 1008 MB LOW CENTERED
NEAR 34N47W AND THE ASSOCIATED COLD FRONT EXTENDING FROM THE LOW
SW TO 27N52W. THE FRONT BECOMES A DISSIPATING STATIONARY FRONT W-
SW TO 25N60W THEN TO 24N69W. GIVEN A MORE REASONABLE AMOUNT OF
MIDDLE TO UPPER LEVEL DIFFLUENCE...SCATTERED SHOWERS AND
ISOLATED TSTMS ARE OCCURRING ACROSS A LARGER AREA WITHIN 300 NM
EAST OF THE FRONT. ACROSS THE EASTERN ATLC...AN OCCLUDED 1017 MB
LOW IS CENTERED NEAR 31N28W AND SUPPORTS A TRIPLE POINT 1016 MB
LOW NEAR 32N26W AND ASSOCIATED COLD FRONT ANALYZED SW TO
27N32W...THEN NW AS A STATIONARY FRONT TO 29N37W...AND FINALLY
AS A WARM FRONT INTO THE AFOREMENTIONED 1008 MB LOW NEAR 34N47W.
ISOLATED SHOWERS ARE POSSIBLE WITHIN 90 NM EITHER SIDE OF THE
FRONT. OTHERWISE...THE REMAINDER OF THE EASTERN ATLC IS UNDER
THE INFLUENCE OF A SURFACE RIDGE ANCHORED BY A 1022 MB HIGH
CENTERED NEAR 24N30W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
HUFFMAN


000
AXNT20 KNHC 251738
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1700 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 14N17W TO
05N21W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
05N21W TO THE EQUATOR NEAR 38W. SCATTERED MODERATE CONVECTION IS
FROM 05N-07N BETWEEN 11W-16W...AND FROM THE EQUATOR TO 03N
BETWEEN 45W-52W.

...DISCUSSION...

GULF OF MEXICO...
UPPER LEVEL SOUTHWESTERLY FLOW ALOFT INFLUENCES MUCH OF THE GULF
BASIN THIS AFTERNOON WITH A MID-LEVEL SHORTWAVE TROUGH NOTED ON
WATER VAPOR IMAGERY PROGRESSING NORTHEASTWARD OVER LOUISIANA
NEAR 31N92W. WHILE NO SIGNIFICANT SURFACE FEATURE IS PRESENT
ACROSS THE WESTERN GULF WATERS OR PORTIONS OF COASTAL TEXAS...A
BROAD AREA OF LOWER PRESSURE VALUES EXISTS ACROSS THE NW AND
WEST-CENTRAL GULF WATERS. THE MID-LEVEL DYNAMICS IN PLACE OVER
LOUISIANA ARE GENERATING AN AREA OF SCATTERED SHOWERS AND TSTMS
N OF 28N BETWEEN 91W-97W...INCLUDING INLAND PORTIONS OF SE TEXAS
AND LOUISIANA. THIS MID-LEVEL ENERGY IS EXPECTED TO CONTINUE
ROUNDING AN UPPER LEVEL RIDGE ANCHORED OVER THE WESTERN
CARIBBEAN SEA NEAR 18N80W. SOUTHERLY GENTLE TO MODERATE BREEZE
CONDITIONS ARE EXPECTED TO PERSIST THROUGH MONDAY AS AN AREA OF
LOW PRESSURE DEVELOPS ACROSS THE SOUTHERN PLAINS WHICH WILL
INTRODUCE A FRONTAL BOUNDARY FORECAST TO EMERGE OFF THE TEXAS
AND LOUISIANA COASTS EARLY MONDAY AND QUICKLY LIFT NORTHWARD BY
LATE MONDAY. THE LOW PRESSURE AREA IS EXPECTED TO WEAKEN WITH A
SECONDARY FRONT TO EMERGE OFF THE NW GULF COAST EARLY TUESDAY.
STRONGER NORTHERLY WINDS ARE ANTICIPATED BEHIND THIS SECONDARY
COLD FRONT ACROSS THE WESTERN GULF WATERS BEGINNING LATE TUESDAY
THROUGH EARLY THURSDAY.

CARIBBEAN SEA...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER THE
WESTERN CARIBBEAN NEAR 18N80W WITH THE BASIN E OF 78W UNDER THE
INFLUENCE OF NORTHERLY FLOW ALOFT ON THE EASTERN PERIPHERY OF
THE RIDGING. WATER VAPOR IMAGERY INDICATES THE ENTIRE
CIRCULATION REMAINS VERY DRY WITH STRONG SUBSIDENCE RESULTING IN
MOSTLY CLEAR SKIES AND FAIR CONDITIONS ACROSS THE CARIBBEAN
WATERS THIS AFTERNOON. WHILE AN OVERALL WEAK PRESSURE GRADIENT
CONTINUES TO MAINTAIN MODERATE TO FRESH BREEZE CONDITIONS...
SLIGHTLY STRONGER BREEZE CONDITIONS ARE EXPECTED WITHIN CLOSE
PROXIMITY TO THE COAST OF COLOMBIA AND IN THE GULF OF HONDURAS.
OTHERWISE...A SURFACE RIDGE AXIS EXTENDS ALONG 20N FROM THE
CENTRAL ATLC TO 75W PROVIDING FOR VERY SIMILAR TRANQUIL SYNOPTIC
CONDITIONS EXPECTED THROUGH EARLY TUESDAY.

...HISPANIOLA...
CURRENTLY MOSTLY CLEAR SKIES PREVAIL UNDER STRONG SUBSIDENCE
WITHIN DRY AIR ALOFT. THESE OVERALL CONDITIONS ARE EXPECTED TO
PERSIST THE NEXT FEW DAYS AS A SURFACE RIDGE AXIS EXTENDS ALONG
20N FROM THE CENTRAL ATLC TO 75W.

ATLANTIC OCEAN...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OFF THE COAST OF
NEW ENGLAND NEAR 43N66W WITH SHORTWAVE ENERGY ON THE
SOUTHEASTERN PERIPHERY OF THE CYCLONE IN THE VICINITY OF 36N58W.
GIVEN THE DYNAMICS IN PLACE...THEY SUPPORT A COLD FRONT ANALYZED
INTO THE DISCUSSION AREA NEAR 32N57W TO 26N73W. THE FRONT
REMAINS RELATIVELY DRY AS UPPER LEVEL NORTHWESTERLY FLOW
PREVAILS OVER THE SW NORTH ATLC...HOWEVER ISOLATED SHOWERS AND
TSTMS ARE OCCURRING N OF 30N BETWEEN 51W-57W. FURTHERMORE...TO
THE SOUTHEAST...MIDDLE TO UPPER LEVEL SHORTWAVE ENERGY NOTED ON
WATER VAPOR IMAGERY NEAR 28N51W SUPPORTS A 1008 MB LOW CENTERED
NEAR 34N47W AND THE ASSOCIATED COLD FRONT EXTENDING FROM THE LOW
SW TO 27N52W. THE FRONT BECOMES A DISSIPATING STATIONARY FRONT W-
SW TO 25N60W THEN TO 24N69W. GIVEN A MORE REASONABLE AMOUNT OF
MIDDLE TO UPPER LEVEL DIFFLUENCE...SCATTERED SHOWERS AND
ISOLATED TSTMS ARE OCCURRING ACROSS A LARGER AREA WITHIN 300 NM
EAST OF THE FRONT. ACROSS THE EASTERN ATLC...AN OCCLUDED 1017 MB
LOW IS CENTERED NEAR 31N28W AND SUPPORTS A TRIPLE POINT 1016 MB
LOW NEAR 32N26W AND ASSOCIATED COLD FRONT ANALYZED SW TO
27N32W...THEN NW AS A STATIONARY FRONT TO 29N37W...AND FINALLY
AS A WARM FRONT INTO THE AFOREMENTIONED 1008 MB LOW NEAR 34N47W.
ISOLATED SHOWERS ARE POSSIBLE WITHIN 90 NM EITHER SIDE OF THE
FRONT. OTHERWISE...THE REMAINDER OF THE EASTERN ATLC IS UNDER
THE INFLUENCE OF A SURFACE RIDGE ANCHORED BY A 1022 MB HIGH
CENTERED NEAR 24N30W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
HUFFMAN



000
AXPZ20 KNHC 251503
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 9N92W TO 7N100N 8N111W TO 5N120W 7N127W TO 6N140W.
NUMEROUS STRONG CONVECTION FROM 3N-8N BETWEEN 128W-140W.

...DISCUSSION...

AN UPPER LEVEL TROUGH WITH AXIS FROM 32N130W TO 26N140W. A 95-
105 KT JETSTREAM SE OF THE TROUGH EXTENDS FROM 23N115W INTO
SOUTHERN BAJA CALIFORNIA TO NORTHERN MEXICO. STRONG SUBSIDENCE
WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF
15N W OF 115W. UPPER LEVEL DIFFLUENCE IS ENHANCING NUMEROUS
STRONG CONVECTION ALONG THE ITCZ FROM 3N-8N BETWEEN 128W-140W.
AN ANTICYCLONIC CIRCULATION IS CENTERED OVER SOUTHERN GUATEMALA
NEAR 14N191W WITH RIDGE SW TO 10N110W.

SURFACE RIDGE IS N OF 15N W OF 108W. THE PRES GRADIENT BETWEEN
THE RIDGE AND THE ITCZ IS SUPPORTING ELY TRADE WINDS 20-25 KT
WITH SEAS 8-10 FT W OF A LINE FROM 24N140W TO 15N115W TO
04N140W. THE WINDS WILL DECREASE TO 20 KT OR LESS TUE...HOWEVER
8-9 FT NW SWELL BE FROM 9N-17N W OF 120W.

$$
DGS



000
AXPZ20 KNHC 251503
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 9N92W TO 7N100N 8N111W TO 5N120W 7N127W TO 6N140W.
NUMEROUS STRONG CONVECTION FROM 3N-8N BETWEEN 128W-140W.

...DISCUSSION...

AN UPPER LEVEL TROUGH WITH AXIS FROM 32N130W TO 26N140W. A 95-
105 KT JETSTREAM SE OF THE TROUGH EXTENDS FROM 23N115W INTO
SOUTHERN BAJA CALIFORNIA TO NORTHERN MEXICO. STRONG SUBSIDENCE
WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF
15N W OF 115W. UPPER LEVEL DIFFLUENCE IS ENHANCING NUMEROUS
STRONG CONVECTION ALONG THE ITCZ FROM 3N-8N BETWEEN 128W-140W.
AN ANTICYCLONIC CIRCULATION IS CENTERED OVER SOUTHERN GUATEMALA
NEAR 14N191W WITH RIDGE SW TO 10N110W.

SURFACE RIDGE IS N OF 15N W OF 108W. THE PRES GRADIENT BETWEEN
THE RIDGE AND THE ITCZ IS SUPPORTING ELY TRADE WINDS 20-25 KT
WITH SEAS 8-10 FT W OF A LINE FROM 24N140W TO 15N115W TO
04N140W. THE WINDS WILL DECREASE TO 20 KT OR LESS TUE...HOWEVER
8-9 FT NW SWELL BE FROM 9N-17N W OF 120W.

$$
DGS


000
AXNT20 KNHC 251035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N16W ALONG 7N17W TO 5N21W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N29W THEN S OF THE EQUATOR NEAR 36W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM THE EQUATOR TO 2N W OF 47W TO
INLAND OVER SOUTH AMERICA. CLUSTERS OF SCATTERED MODERATE
CONVECTION ARE FROM 6N TO S OF THE EQUATOR BETWEEN 3W-23W AND
FROM 2N TO S OF THE EQUATOR BETWEEN 37W-47W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERS THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. SCATTERED
SHOWERS/ISOLATED THUNDERSTORMS ARE OVER THE W GULF W OF LINE
FROM VERMILION BAY LOUISIANA ALONG 26N94W TO TAMPICO MEXICO. THE
REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR SKIES THIS MORNING
WITH SOME PATCHY FOG STILL BEING REPORTED OVER THE NW GULF. A
WEAK ATLC SURFACE RIDGE WILL EXTEND W OVER THE GULF TODAY
THROUGH SUN NIGHT. A NEW COLD FRONT WILL DIP INTO THE N GULF MON
MORNING AND STALL ALONG 28N BEFORE RETREATING AS A WARM FRONT
OVERNIGHT MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
17N82W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
THIS MORNING. LINGERING ISOLATED SHOWERS REMAIN OVER HISPANIOLA
AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE CARIBBEAN
WITH MOSTLY CLEAR SKIES AGAIN THIS MORNING. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH TONIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND SE HAITI S OF 19N BETWEEN 70W-73W. THE DOMINICAN REPUBLIC
OFFICE OF METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS
WEEKEND. THESE TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING
IN THE MOUNTAINOUS TERRAIN GIVING THE AREA OF W DOMINICAN
REPUBLIC AND E HAITI ISOLATED TO SCATTERED SHOWERS THROUGH THE
WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A WEAK SURFACE RIDGE COVERING THE AREA N OF 29N W OF
73W AND ANCHORED BY A 1018 MB HIGH NEAR 32N76W. THE BROAD UPPER
TROUGH OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE
OVER THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD
FRONTS. THE LEADING COLD FRONT IS WEAKENING AND EXTENDS FROM A
1008 MB LOW NEAR 32N49W ALONG 26N56W TO 25N67W. SCATTERED
SHOWERS ARE FROM 24N-30N BETWEEN 49W-54W. THE SECOND COLD FRONT
HAS RETREATED N OF THE DISCUSSION AREA. THE TRAILING FRONT
EXTENDS THROUGH 32N60W TO 28N65W WHERE IT DISSIPATES TO 27N72W.
SCATTERED SHOWERS/THUNDERSTORMS ARE WITHIN 60 NM OF LINE FROM
28N62W TO BEYOND 32N58W. AN UPPER TROUGH N OF THE E/CENTRAL ATLC
IS SUPPORTING A COLD FRONT THAT ENTERS THE E/CENTRAL ATLC NEAR
32N30W AND EXTENDS ALONG 29N35W TO 29N40W WHERE IT CONTINUES AS
STATIONARY/WARM FRONT TO THE 1008 MB LOW NEAR 32N49W. THE
REMAINDER OF THE ATLC S OF 28N E OF 60W IS DOMINATED BY A
SURFACE RIDGE AND ANCHORED BY A 1021 MB HIGH NEAR 24N34W. THE
LEADING CENTRAL ATLC COLD FRONT WILL DISSIPATE TODAY. THE
TRAILING FRONT WILL SWEEP ACROSS THE N PORTION OF THE DISCUSSION
AREA. W ATLC HIGH PRESSURE WILL SHIFT SE TODAY AND TONIGHT. A
LOW PRESSURE WILL ORGANIZE N OF THE AREA SUN AND SEND A COLD
FRONT INTO W ATLC EARLY MON THAT WILL STRETCH ALONG 27N TUE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW


000
AXNT20 KNHC 251035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N16W ALONG 7N17W TO 5N21W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N29W THEN S OF THE EQUATOR NEAR 36W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM THE EQUATOR TO 2N W OF 47W TO
INLAND OVER SOUTH AMERICA. CLUSTERS OF SCATTERED MODERATE
CONVECTION ARE FROM 6N TO S OF THE EQUATOR BETWEEN 3W-23W AND
FROM 2N TO S OF THE EQUATOR BETWEEN 37W-47W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERS THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. SCATTERED
SHOWERS/ISOLATED THUNDERSTORMS ARE OVER THE W GULF W OF LINE
FROM VERMILION BAY LOUISIANA ALONG 26N94W TO TAMPICO MEXICO. THE
REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR SKIES THIS MORNING
WITH SOME PATCHY FOG STILL BEING REPORTED OVER THE NW GULF. A
WEAK ATLC SURFACE RIDGE WILL EXTEND W OVER THE GULF TODAY
THROUGH SUN NIGHT. A NEW COLD FRONT WILL DIP INTO THE N GULF MON
MORNING AND STALL ALONG 28N BEFORE RETREATING AS A WARM FRONT
OVERNIGHT MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
17N82W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
THIS MORNING. LINGERING ISOLATED SHOWERS REMAIN OVER HISPANIOLA
AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE CARIBBEAN
WITH MOSTLY CLEAR SKIES AGAIN THIS MORNING. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH TONIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND SE HAITI S OF 19N BETWEEN 70W-73W. THE DOMINICAN REPUBLIC
OFFICE OF METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS
WEEKEND. THESE TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING
IN THE MOUNTAINOUS TERRAIN GIVING THE AREA OF W DOMINICAN
REPUBLIC AND E HAITI ISOLATED TO SCATTERED SHOWERS THROUGH THE
WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A WEAK SURFACE RIDGE COVERING THE AREA N OF 29N W OF
73W AND ANCHORED BY A 1018 MB HIGH NEAR 32N76W. THE BROAD UPPER
TROUGH OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE
OVER THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD
FRONTS. THE LEADING COLD FRONT IS WEAKENING AND EXTENDS FROM A
1008 MB LOW NEAR 32N49W ALONG 26N56W TO 25N67W. SCATTERED
SHOWERS ARE FROM 24N-30N BETWEEN 49W-54W. THE SECOND COLD FRONT
HAS RETREATED N OF THE DISCUSSION AREA. THE TRAILING FRONT
EXTENDS THROUGH 32N60W TO 28N65W WHERE IT DISSIPATES TO 27N72W.
SCATTERED SHOWERS/THUNDERSTORMS ARE WITHIN 60 NM OF LINE FROM
28N62W TO BEYOND 32N58W. AN UPPER TROUGH N OF THE E/CENTRAL ATLC
IS SUPPORTING A COLD FRONT THAT ENTERS THE E/CENTRAL ATLC NEAR
32N30W AND EXTENDS ALONG 29N35W TO 29N40W WHERE IT CONTINUES AS
STATIONARY/WARM FRONT TO THE 1008 MB LOW NEAR 32N49W. THE
REMAINDER OF THE ATLC S OF 28N E OF 60W IS DOMINATED BY A
SURFACE RIDGE AND ANCHORED BY A 1021 MB HIGH NEAR 24N34W. THE
LEADING CENTRAL ATLC COLD FRONT WILL DISSIPATE TODAY. THE
TRAILING FRONT WILL SWEEP ACROSS THE N PORTION OF THE DISCUSSION
AREA. W ATLC HIGH PRESSURE WILL SHIFT SE TODAY AND TONIGHT. A
LOW PRESSURE WILL ORGANIZE N OF THE AREA SUN AND SEND A COLD
FRONT INTO W ATLC EARLY MON THAT WILL STRETCH ALONG 27N TUE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 251035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N16W ALONG 7N17W TO 5N21W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N29W THEN S OF THE EQUATOR NEAR 36W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM THE EQUATOR TO 2N W OF 47W TO
INLAND OVER SOUTH AMERICA. CLUSTERS OF SCATTERED MODERATE
CONVECTION ARE FROM 6N TO S OF THE EQUATOR BETWEEN 3W-23W AND
FROM 2N TO S OF THE EQUATOR BETWEEN 37W-47W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERS THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. SCATTERED
SHOWERS/ISOLATED THUNDERSTORMS ARE OVER THE W GULF W OF LINE
FROM VERMILION BAY LOUISIANA ALONG 26N94W TO TAMPICO MEXICO. THE
REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR SKIES THIS MORNING
WITH SOME PATCHY FOG STILL BEING REPORTED OVER THE NW GULF. A
WEAK ATLC SURFACE RIDGE WILL EXTEND W OVER THE GULF TODAY
THROUGH SUN NIGHT. A NEW COLD FRONT WILL DIP INTO THE N GULF MON
MORNING AND STALL ALONG 28N BEFORE RETREATING AS A WARM FRONT
OVERNIGHT MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
17N82W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
THIS MORNING. LINGERING ISOLATED SHOWERS REMAIN OVER HISPANIOLA
AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE CARIBBEAN
WITH MOSTLY CLEAR SKIES AGAIN THIS MORNING. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH TONIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND SE HAITI S OF 19N BETWEEN 70W-73W. THE DOMINICAN REPUBLIC
OFFICE OF METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS
WEEKEND. THESE TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING
IN THE MOUNTAINOUS TERRAIN GIVING THE AREA OF W DOMINICAN
REPUBLIC AND E HAITI ISOLATED TO SCATTERED SHOWERS THROUGH THE
WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A WEAK SURFACE RIDGE COVERING THE AREA N OF 29N W OF
73W AND ANCHORED BY A 1018 MB HIGH NEAR 32N76W. THE BROAD UPPER
TROUGH OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE
OVER THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD
FRONTS. THE LEADING COLD FRONT IS WEAKENING AND EXTENDS FROM A
1008 MB LOW NEAR 32N49W ALONG 26N56W TO 25N67W. SCATTERED
SHOWERS ARE FROM 24N-30N BETWEEN 49W-54W. THE SECOND COLD FRONT
HAS RETREATED N OF THE DISCUSSION AREA. THE TRAILING FRONT
EXTENDS THROUGH 32N60W TO 28N65W WHERE IT DISSIPATES TO 27N72W.
SCATTERED SHOWERS/THUNDERSTORMS ARE WITHIN 60 NM OF LINE FROM
28N62W TO BEYOND 32N58W. AN UPPER TROUGH N OF THE E/CENTRAL ATLC
IS SUPPORTING A COLD FRONT THAT ENTERS THE E/CENTRAL ATLC NEAR
32N30W AND EXTENDS ALONG 29N35W TO 29N40W WHERE IT CONTINUES AS
STATIONARY/WARM FRONT TO THE 1008 MB LOW NEAR 32N49W. THE
REMAINDER OF THE ATLC S OF 28N E OF 60W IS DOMINATED BY A
SURFACE RIDGE AND ANCHORED BY A 1021 MB HIGH NEAR 24N34W. THE
LEADING CENTRAL ATLC COLD FRONT WILL DISSIPATE TODAY. THE
TRAILING FRONT WILL SWEEP ACROSS THE N PORTION OF THE DISCUSSION
AREA. W ATLC HIGH PRESSURE WILL SHIFT SE TODAY AND TONIGHT. A
LOW PRESSURE WILL ORGANIZE N OF THE AREA SUN AND SEND A COLD
FRONT INTO W ATLC EARLY MON THAT WILL STRETCH ALONG 27N TUE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXPZ20 KNHC 250930
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

WEAK MONSOON TROUGH EXTENDS FROM 08N84W TO 04N94W. ITCZ EXTENDS
FROM 06N96W TO 10N107W...THEN RESUMES FROM 07N126W TO 05N140W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 03N TO 06N E
OF 78W...AND FROM 03N TO 06N BETWEEN 91W-94W. NUMEROUS MODERATE
SCATTERED STRONG CONVECTION WITHIN 90 NM OF AXIS W OF 129W.

...DISCUSSION...

A BROAD LONG WAVE TROUGH DOMINATES MID-UPPER LEVELS N OF 15N W
OF 110W. A SHORT WAVE TROUGH ROTATING THROUGH THE BASE OF THE
TROUGH EVIDENT ON WATER VAPOR IMAGERY FROM SOUTHERN CALIFORNIA
NEAR LOS ANGELES W-SW TO AROUND 27N142W. A CORRESPONDING COLD
FRONT IS NOT EVIDENT NEAR THE SURFACE. STRONGLY DIFFLUENT FLOW
ALOFT IS ENHANCING DEEP CONVECTION W OF 129W ALONG THE ITCZ.

A NEARLY STATIONARY SUBTROPICAL RIDGE ANCHORED BY 1029 MB HIGH
CENTERED NEAR 32N141W EXTENDS ACROSS MOST OF THE DISCUSSION AREA
N OF 17N W OF 115W. SCATTEROMETER DATA CONTINUES TO SHOW A LARGE
AREA OF FRESH TO STRONG NE WINDS BETWEEN 10N-20N W OF 120W. WIND
WAVES GENERATED BY THE ENHANCED TRADES ARE SUPPORTING 8-11 FT
COMBINED SEAS IN WESTERN WATERS N OF THE ITCZ.

SCATTEROMETER DATA ALSO SHOWS FRESH TO STRONG NW WINDS ALONG THE
SOUTHERN CALIFORNIA COAST. THESE WINDS ARE EXPECTED TO INCREASE
TODAY...AND PRODUCE FRESH SWELL THAT WILL SWEEP S OF 30N W OF
124W TONIGHT THROUGH MON...WITH SEA HEIGHTS PEAKING AT 10-11 FT
SUN NIGHT.

EXTREME NORTHERN GULF OF CALIFORNIA CAN EXPECT 20-25 KT W-SW
WINDS FOR A FEW HOURS TONIGHT FROM DIURNAL EFFECTS ASSOCIATED
WITH A SONORAN DESERT THERMAL TROUGH EXTENDING INTO THE GULF.

$$
MUNDELL



000
AXPZ20 KNHC 250930
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

WEAK MONSOON TROUGH EXTENDS FROM 08N84W TO 04N94W. ITCZ EXTENDS
FROM 06N96W TO 10N107W...THEN RESUMES FROM 07N126W TO 05N140W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 03N TO 06N E
OF 78W...AND FROM 03N TO 06N BETWEEN 91W-94W. NUMEROUS MODERATE
SCATTERED STRONG CONVECTION WITHIN 90 NM OF AXIS W OF 129W.

...DISCUSSION...

A BROAD LONG WAVE TROUGH DOMINATES MID-UPPER LEVELS N OF 15N W
OF 110W. A SHORT WAVE TROUGH ROTATING THROUGH THE BASE OF THE
TROUGH EVIDENT ON WATER VAPOR IMAGERY FROM SOUTHERN CALIFORNIA
NEAR LOS ANGELES W-SW TO AROUND 27N142W. A CORRESPONDING COLD
FRONT IS NOT EVIDENT NEAR THE SURFACE. STRONGLY DIFFLUENT FLOW
ALOFT IS ENHANCING DEEP CONVECTION W OF 129W ALONG THE ITCZ.

A NEARLY STATIONARY SUBTROPICAL RIDGE ANCHORED BY 1029 MB HIGH
CENTERED NEAR 32N141W EXTENDS ACROSS MOST OF THE DISCUSSION AREA
N OF 17N W OF 115W. SCATTEROMETER DATA CONTINUES TO SHOW A LARGE
AREA OF FRESH TO STRONG NE WINDS BETWEEN 10N-20N W OF 120W. WIND
WAVES GENERATED BY THE ENHANCED TRADES ARE SUPPORTING 8-11 FT
COMBINED SEAS IN WESTERN WATERS N OF THE ITCZ.

SCATTEROMETER DATA ALSO SHOWS FRESH TO STRONG NW WINDS ALONG THE
SOUTHERN CALIFORNIA COAST. THESE WINDS ARE EXPECTED TO INCREASE
TODAY...AND PRODUCE FRESH SWELL THAT WILL SWEEP S OF 30N W OF
124W TONIGHT THROUGH MON...WITH SEA HEIGHTS PEAKING AT 10-11 FT
SUN NIGHT.

EXTREME NORTHERN GULF OF CALIFORNIA CAN EXPECT 20-25 KT W-SW
WINDS FOR A FEW HOURS TONIGHT FROM DIURNAL EFFECTS ASSOCIATED
WITH A SONORAN DESERT THERMAL TROUGH EXTENDING INTO THE GULF.

$$
MUNDELL


000
AXNT20 KNHC 250526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 8N13W TO 4N21W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N27W THEN S OF THE EQUATOR NEAR 31W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-8N BETWEEN 1W-
14W AND FROM 1N TO S OF THE EQUATOR BETWEEN 36W-42W AND W OF 46W
TO INLAND OVER SOUTH AMERICA.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERING THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. A REMNANT WARM
FRONT REMAINS OVER THE N GULF EXTENDING FROM 28N84W TO INLAND
OVER LOUISIANA NEAR THE MISSISSIPPI BORDER. SCATTERED SHOWERS/
ISOLATED THUNDERSTORMS ARE N OF THE FRONT TO OVER THE FLORIDA
PANHANDLE BETWEEN PANAMA CITY AND THE ALABAMA/MISSISSIPPI
BORDER. A SEABREEZE SURFACE TROUGH IS OVER THE FLORIDA PENINSULA
BUT IS ONLY PRODUCING ISOLATED SHOWERS INLAND AND OVER THE
FLORIDA KEYS. THE REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR
SKIES TONIGHT WITH SOME PATCHY FOG REPORTED OVER THE NW GULF.
THE WARM FRONT WILL SHIFT N AND WEAKEN OVERNIGHT TONIGHT. A WEAK
ATLC SURFACE RIDGE WILL EXTEND WESTWARD ACROSS THE AREA THROUGH
SUN NIGHT. A COLD FRONT WILL DIP INTO THE NORTHERN GULF MON
MORNING AND STALL ALONG 28N BEFORE LIFTING BACK N AS A WARM
FRONT LATE MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
18N83W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS HAVE DIED OUT OVER CUBA
WHILE ISOLATED SHOWERS REMAIN OVER HISPANIOLA...PUERTO
RICO...AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE
CARIBBEAN WITH MOSTLY CLEAR SKIES TONIGHT. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH SAT NIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME W DOMINICAN REPUBLIC
AND E HAITI BETWEEN 70W-73W. THE DOMINICAN REPUBLIC OFFICE OF
METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS WEEKEND. THESE
TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING IN THE MOUNTAINOUS
TERRAIN GIVING THE AREA OF W DOMINICAN REPUBLIC AND E HAITI
ISOLATED TO SCATTERED SHOWERS THROUGH THE WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A SURFACE RIDGE COVERING THE AREA N OF 29N W OF 73W
ANCHORED BY A 1018 MB HIGH NEAR 32N78W. THE BROAD UPPER TROUGH
OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE OVER
THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD FRONTS.
THE LEADING FRONT EXTENDS FROM A 1010 MB LOW NEAR 32N52W AND
EXTENDS ALONG 27N56W TO 25N62W WHERE IT DISSIPATES AS A
STATIONARY FRONT TO 25N69W. SCATTERED SHOWERS ARE WITHIN 150 NM
SE OF THE FRONT E OF 58W. THE SECOND COLD FRONT ENTERS THE
REGION NEAR 32N59W AND EXTENDS ALONG 31N62W 30N68W TO 27N72W.
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 90 NM SE OF
THE FRONT BETWEEN 61W-68W. THE TRAILING FRONT IS JUST N OF THE
REGION AND EXTENDS TO 32N68W. SCATTERED SHOWERS/THUNDERSTORMS
ARE FROM 31N TO 33N BETWEEN 59W-67W. AN UPPER TROUGH N OF THE
E/CENTRAL ATLC IS SUPPORTING A COLD FRONT THAT ENTERS THE
E/CENTRAL ATLC NEAR 32N32W AND EXTENDS ALONG 29N35W TO 30N41W
WHERE IT CONTINUES AS A WARM FRONT TO THE 1010 MB LOW NEAR
32N52W. ISOLATED SHOWERS ARE WITHIN 30 NM OF THE COLD FRONT. THE
REMAINDER OF THE ATLC IS DOMINATED BY A SURFACE RIDGE THAT
COVERS THE AREA S OF 30N E OF 60W AND ANCHORED BY A 1022 MB HIGH
NEAR 24N28W. THE LEADING CENTRAL ATLC COLD FRONT WILL WEAKEN AS
IT MOVES THROUGH THE CENTRAL ATLC. THE SECOND FRONT WILL REACH
FROM 32N59W NEAR 28N65W TO 26N72W EARLY ON SAT AND WEAKEN AS IT
MOVES ACROSS THE FAR S WATERS N OF THE GREATER ANTILLES SAT
AFTERNOON AND NIGHT. THE TRAILING FRONT WILL STAY JUST N OF THE
DISCUSSION AREA. YET ANOTHER COLD FRONT WILL MOVE INTO THE NW
WATERS EARLY MON AND EXTEND FROM NEAR BERMUDA TO CENTRAL FLORIDA
MON.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 250526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 8N13W TO 4N21W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N27W THEN S OF THE EQUATOR NEAR 31W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-8N BETWEEN 1W-
14W AND FROM 1N TO S OF THE EQUATOR BETWEEN 36W-42W AND W OF 46W
TO INLAND OVER SOUTH AMERICA.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERING THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. A REMNANT WARM
FRONT REMAINS OVER THE N GULF EXTENDING FROM 28N84W TO INLAND
OVER LOUISIANA NEAR THE MISSISSIPPI BORDER. SCATTERED SHOWERS/
ISOLATED THUNDERSTORMS ARE N OF THE FRONT TO OVER THE FLORIDA
PANHANDLE BETWEEN PANAMA CITY AND THE ALABAMA/MISSISSIPPI
BORDER. A SEABREEZE SURFACE TROUGH IS OVER THE FLORIDA PENINSULA
BUT IS ONLY PRODUCING ISOLATED SHOWERS INLAND AND OVER THE
FLORIDA KEYS. THE REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR
SKIES TONIGHT WITH SOME PATCHY FOG REPORTED OVER THE NW GULF.
THE WARM FRONT WILL SHIFT N AND WEAKEN OVERNIGHT TONIGHT. A WEAK
ATLC SURFACE RIDGE WILL EXTEND WESTWARD ACROSS THE AREA THROUGH
SUN NIGHT. A COLD FRONT WILL DIP INTO THE NORTHERN GULF MON
MORNING AND STALL ALONG 28N BEFORE LIFTING BACK N AS A WARM
FRONT LATE MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
18N83W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS HAVE DIED OUT OVER CUBA
WHILE ISOLATED SHOWERS REMAIN OVER HISPANIOLA...PUERTO
RICO...AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE
CARIBBEAN WITH MOSTLY CLEAR SKIES TONIGHT. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH SAT NIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME W DOMINICAN REPUBLIC
AND E HAITI BETWEEN 70W-73W. THE DOMINICAN REPUBLIC OFFICE OF
METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS WEEKEND. THESE
TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING IN THE MOUNTAINOUS
TERRAIN GIVING THE AREA OF W DOMINICAN REPUBLIC AND E HAITI
ISOLATED TO SCATTERED SHOWERS THROUGH THE WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A SURFACE RIDGE COVERING THE AREA N OF 29N W OF 73W
ANCHORED BY A 1018 MB HIGH NEAR 32N78W. THE BROAD UPPER TROUGH
OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE OVER
THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD FRONTS.
THE LEADING FRONT EXTENDS FROM A 1010 MB LOW NEAR 32N52W AND
EXTENDS ALONG 27N56W TO 25N62W WHERE IT DISSIPATES AS A
STATIONARY FRONT TO 25N69W. SCATTERED SHOWERS ARE WITHIN 150 NM
SE OF THE FRONT E OF 58W. THE SECOND COLD FRONT ENTERS THE
REGION NEAR 32N59W AND EXTENDS ALONG 31N62W 30N68W TO 27N72W.
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 90 NM SE OF
THE FRONT BETWEEN 61W-68W. THE TRAILING FRONT IS JUST N OF THE
REGION AND EXTENDS TO 32N68W. SCATTERED SHOWERS/THUNDERSTORMS
ARE FROM 31N TO 33N BETWEEN 59W-67W. AN UPPER TROUGH N OF THE
E/CENTRAL ATLC IS SUPPORTING A COLD FRONT THAT ENTERS THE
E/CENTRAL ATLC NEAR 32N32W AND EXTENDS ALONG 29N35W TO 30N41W
WHERE IT CONTINUES AS A WARM FRONT TO THE 1010 MB LOW NEAR
32N52W. ISOLATED SHOWERS ARE WITHIN 30 NM OF THE COLD FRONT. THE
REMAINDER OF THE ATLC IS DOMINATED BY A SURFACE RIDGE THAT
COVERS THE AREA S OF 30N E OF 60W AND ANCHORED BY A 1022 MB HIGH
NEAR 24N28W. THE LEADING CENTRAL ATLC COLD FRONT WILL WEAKEN AS
IT MOVES THROUGH THE CENTRAL ATLC. THE SECOND FRONT WILL REACH
FROM 32N59W NEAR 28N65W TO 26N72W EARLY ON SAT AND WEAKEN AS IT
MOVES ACROSS THE FAR S WATERS N OF THE GREATER ANTILLES SAT
AFTERNOON AND NIGHT. THE TRAILING FRONT WILL STAY JUST N OF THE
DISCUSSION AREA. YET ANOTHER COLD FRONT WILL MOVE INTO THE NW
WATERS EARLY MON AND EXTEND FROM NEAR BERMUDA TO CENTRAL FLORIDA
MON.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 250526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 8N13W TO 4N21W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N27W THEN S OF THE EQUATOR NEAR 31W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-8N BETWEEN 1W-
14W AND FROM 1N TO S OF THE EQUATOR BETWEEN 36W-42W AND W OF 46W
TO INLAND OVER SOUTH AMERICA.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERING THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. A REMNANT WARM
FRONT REMAINS OVER THE N GULF EXTENDING FROM 28N84W TO INLAND
OVER LOUISIANA NEAR THE MISSISSIPPI BORDER. SCATTERED SHOWERS/
ISOLATED THUNDERSTORMS ARE N OF THE FRONT TO OVER THE FLORIDA
PANHANDLE BETWEEN PANAMA CITY AND THE ALABAMA/MISSISSIPPI
BORDER. A SEABREEZE SURFACE TROUGH IS OVER THE FLORIDA PENINSULA
BUT IS ONLY PRODUCING ISOLATED SHOWERS INLAND AND OVER THE
FLORIDA KEYS. THE REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR
SKIES TONIGHT WITH SOME PATCHY FOG REPORTED OVER THE NW GULF.
THE WARM FRONT WILL SHIFT N AND WEAKEN OVERNIGHT TONIGHT. A WEAK
ATLC SURFACE RIDGE WILL EXTEND WESTWARD ACROSS THE AREA THROUGH
SUN NIGHT. A COLD FRONT WILL DIP INTO THE NORTHERN GULF MON
MORNING AND STALL ALONG 28N BEFORE LIFTING BACK N AS A WARM
FRONT LATE MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
18N83W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS HAVE DIED OUT OVER CUBA
WHILE ISOLATED SHOWERS REMAIN OVER HISPANIOLA...PUERTO
RICO...AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE
CARIBBEAN WITH MOSTLY CLEAR SKIES TONIGHT. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH SAT NIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME W DOMINICAN REPUBLIC
AND E HAITI BETWEEN 70W-73W. THE DOMINICAN REPUBLIC OFFICE OF
METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS WEEKEND. THESE
TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING IN THE MOUNTAINOUS
TERRAIN GIVING THE AREA OF W DOMINICAN REPUBLIC AND E HAITI
ISOLATED TO SCATTERED SHOWERS THROUGH THE WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A SURFACE RIDGE COVERING THE AREA N OF 29N W OF 73W
ANCHORED BY A 1018 MB HIGH NEAR 32N78W. THE BROAD UPPER TROUGH
OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE OVER
THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD FRONTS.
THE LEADING FRONT EXTENDS FROM A 1010 MB LOW NEAR 32N52W AND
EXTENDS ALONG 27N56W TO 25N62W WHERE IT DISSIPATES AS A
STATIONARY FRONT TO 25N69W. SCATTERED SHOWERS ARE WITHIN 150 NM
SE OF THE FRONT E OF 58W. THE SECOND COLD FRONT ENTERS THE
REGION NEAR 32N59W AND EXTENDS ALONG 31N62W 30N68W TO 27N72W.
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 90 NM SE OF
THE FRONT BETWEEN 61W-68W. THE TRAILING FRONT IS JUST N OF THE
REGION AND EXTENDS TO 32N68W. SCATTERED SHOWERS/THUNDERSTORMS
ARE FROM 31N TO 33N BETWEEN 59W-67W. AN UPPER TROUGH N OF THE
E/CENTRAL ATLC IS SUPPORTING A COLD FRONT THAT ENTERS THE
E/CENTRAL ATLC NEAR 32N32W AND EXTENDS ALONG 29N35W TO 30N41W
WHERE IT CONTINUES AS A WARM FRONT TO THE 1010 MB LOW NEAR
32N52W. ISOLATED SHOWERS ARE WITHIN 30 NM OF THE COLD FRONT. THE
REMAINDER OF THE ATLC IS DOMINATED BY A SURFACE RIDGE THAT
COVERS THE AREA S OF 30N E OF 60W AND ANCHORED BY A 1022 MB HIGH
NEAR 24N28W. THE LEADING CENTRAL ATLC COLD FRONT WILL WEAKEN AS
IT MOVES THROUGH THE CENTRAL ATLC. THE SECOND FRONT WILL REACH
FROM 32N59W NEAR 28N65W TO 26N72W EARLY ON SAT AND WEAKEN AS IT
MOVES ACROSS THE FAR S WATERS N OF THE GREATER ANTILLES SAT
AFTERNOON AND NIGHT. THE TRAILING FRONT WILL STAY JUST N OF THE
DISCUSSION AREA. YET ANOTHER COLD FRONT WILL MOVE INTO THE NW
WATERS EARLY MON AND EXTEND FROM NEAR BERMUDA TO CENTRAL FLORIDA
MON.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 250526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 8N13W TO 4N21W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N27W THEN S OF THE EQUATOR NEAR 31W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-8N BETWEEN 1W-
14W AND FROM 1N TO S OF THE EQUATOR BETWEEN 36W-42W AND W OF 46W
TO INLAND OVER SOUTH AMERICA.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN COVERING THE
GULF OF MEXICO AND THE E CONUS INTO THE W ATLC. A REMNANT WARM
FRONT REMAINS OVER THE N GULF EXTENDING FROM 28N84W TO INLAND
OVER LOUISIANA NEAR THE MISSISSIPPI BORDER. SCATTERED SHOWERS/
ISOLATED THUNDERSTORMS ARE N OF THE FRONT TO OVER THE FLORIDA
PANHANDLE BETWEEN PANAMA CITY AND THE ALABAMA/MISSISSIPPI
BORDER. A SEABREEZE SURFACE TROUGH IS OVER THE FLORIDA PENINSULA
BUT IS ONLY PRODUCING ISOLATED SHOWERS INLAND AND OVER THE
FLORIDA KEYS. THE REMAINDER OF THE GULF IS UNDER MOSTLY CLEAR
SKIES TONIGHT WITH SOME PATCHY FOG REPORTED OVER THE NW GULF.
THE WARM FRONT WILL SHIFT N AND WEAKEN OVERNIGHT TONIGHT. A WEAK
ATLC SURFACE RIDGE WILL EXTEND WESTWARD ACROSS THE AREA THROUGH
SUN NIGHT. A COLD FRONT WILL DIP INTO THE NORTHERN GULF MON
MORNING AND STALL ALONG 28N BEFORE LIFTING BACK N AS A WARM
FRONT LATE MON NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE IS ANCHORED IN THE NW CARIBBEAN NEAR
18N83W COVERING THE ENTIRE BASIN AND EXTENDING OVER THE GULF OF
MEXICO AND THE W ATLC. SATELLITE WATER VAPOR IMAGERY CONTINUES
TO SHOW STRONG SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS HAVE DIED OUT OVER CUBA
WHILE ISOLATED SHOWERS REMAIN OVER HISPANIOLA...PUERTO
RICO...AND THE LEEWARD ISLANDS LEAVING THE REMAINDER OF THE
CARIBBEAN WITH MOSTLY CLEAR SKIES TONIGHT. FRESH TO LOCALLY
STRONG TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF
OF HONDURAS THROUGH MON. FRESH TO STRONG TRADE WINDS ALONG THE
COAST OF COLOMBIA WILL DIMINISH SAT NIGHT.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME W DOMINICAN REPUBLIC
AND E HAITI BETWEEN 70W-73W. THE DOMINICAN REPUBLIC OFFICE OF
METEOROLOGY IS FORECASTING HIGH TEMPERATURES THIS WEEKEND. THESE
TEMPERATURES COULD RESULT IN OROGRAPHIC LIFTING IN THE MOUNTAINOUS
TERRAIN GIVING THE AREA OF W DOMINICAN REPUBLIC AND E HAITI
ISOLATED TO SCATTERED SHOWERS THROUGH THE WEEKEND.

ATLANTIC OCEAN...
THE UPPER RIDGE ANCHORED IN THE CARIBBEAN EXTENDS OVER THE W
ATLC WITH A SURFACE RIDGE COVERING THE AREA N OF 29N W OF 73W
ANCHORED BY A 1018 MB HIGH NEAR 32N78W. THE BROAD UPPER TROUGH
OVER THE CANADIAN MARITIMES AND INTO THE NW ATLC DIPS SE OVER
THE CENTRAL ATLC N OF 22N SUPPORTING A SERIES OF COLD FRONTS.
THE LEADING FRONT EXTENDS FROM A 1010 MB LOW NEAR 32N52W AND
EXTENDS ALONG 27N56W TO 25N62W WHERE IT DISSIPATES AS A
STATIONARY FRONT TO 25N69W. SCATTERED SHOWERS ARE WITHIN 150 NM
SE OF THE FRONT E OF 58W. THE SECOND COLD FRONT ENTERS THE
REGION NEAR 32N59W AND EXTENDS ALONG 31N62W 30N68W TO 27N72W.
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 90 NM SE OF
THE FRONT BETWEEN 61W-68W. THE TRAILING FRONT IS JUST N OF THE
REGION AND EXTENDS TO 32N68W. SCATTERED SHOWERS/THUNDERSTORMS
ARE FROM 31N TO 33N BETWEEN 59W-67W. AN UPPER TROUGH N OF THE
E/CENTRAL ATLC IS SUPPORTING A COLD FRONT THAT ENTERS THE
E/CENTRAL ATLC NEAR 32N32W AND EXTENDS ALONG 29N35W TO 30N41W
WHERE IT CONTINUES AS A WARM FRONT TO THE 1010 MB LOW NEAR
32N52W. ISOLATED SHOWERS ARE WITHIN 30 NM OF THE COLD FRONT. THE
REMAINDER OF THE ATLC IS DOMINATED BY A SURFACE RIDGE THAT
COVERS THE AREA S OF 30N E OF 60W AND ANCHORED BY A 1022 MB HIGH
NEAR 24N28W. THE LEADING CENTRAL ATLC COLD FRONT WILL WEAKEN AS
IT MOVES THROUGH THE CENTRAL ATLC. THE SECOND FRONT WILL REACH
FROM 32N59W NEAR 28N65W TO 26N72W EARLY ON SAT AND WEAKEN AS IT
MOVES ACROSS THE FAR S WATERS N OF THE GREATER ANTILLES SAT
AFTERNOON AND NIGHT. THE TRAILING FRONT WILL STAY JUST N OF THE
DISCUSSION AREA. YET ANOTHER COLD FRONT WILL MOVE INTO THE NW
WATERS EARLY MON AND EXTEND FROM NEAR BERMUDA TO CENTRAL FLORIDA
MON.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXPZ20 KNHC 250302
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N83W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N96W TO 07N108W THEN RESUMES FROM 06N127W TO
05N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS
FROM 02N TO 08N BETWEEN 82W AND 91W...FROM 03N TO 06N BETWEEN
93W AND 98W...AND ALSO WITHIN 120 NM EITHER SIDE OF THE AXIS W
OF 132W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N109W THROUGH 20N115W TO 11N124W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A HIGH CENTER IS LOCATED NEAR 32N142W WITH A
RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO 16N107W. A
PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ ACROSS THE CENTRAL
WATERS. THE PRESSURE GRADIENT ACROSS THE W CENTRAL WATERS IS
TIGHT ENOUGH BETWEEN THESE FEATURES TO SUPPORT FRESH TO STRONG
NE-E TRADE WINDS WITH AN AREA OF SURROUNDING COMBINED SEAS OF 8-
11 FT. THESE CONDITIONS WILL PERSIST ACROSS THE SAME GENERAL
AREA THROUGH THE NEXT 48 HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SUN WITH ASSOCIATED SEAS
BUILDING BACK TO 8-10 FT BY SUN EVENING.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW MEXICO INTO
THE FAR NORTHERN GULF. SOUTHERLY FLOW IN THE GULF OF CALIFORNIA
HAS DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL PERSIST THROUGH
EARLY SAT. THE PRESSURE GRADIENT ACROSS THE REGION WILL THEN
TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT SOUTHWESTERLY
WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH
LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK NOCTURNAL
DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
LEVELS JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXPZ20 KNHC 250302
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N83W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N96W TO 07N108W THEN RESUMES FROM 06N127W TO
05N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS
FROM 02N TO 08N BETWEEN 82W AND 91W...FROM 03N TO 06N BETWEEN
93W AND 98W...AND ALSO WITHIN 120 NM EITHER SIDE OF THE AXIS W
OF 132W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N109W THROUGH 20N115W TO 11N124W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A HIGH CENTER IS LOCATED NEAR 32N142W WITH A
RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO 16N107W. A
PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ ACROSS THE CENTRAL
WATERS. THE PRESSURE GRADIENT ACROSS THE W CENTRAL WATERS IS
TIGHT ENOUGH BETWEEN THESE FEATURES TO SUPPORT FRESH TO STRONG
NE-E TRADE WINDS WITH AN AREA OF SURROUNDING COMBINED SEAS OF 8-
11 FT. THESE CONDITIONS WILL PERSIST ACROSS THE SAME GENERAL
AREA THROUGH THE NEXT 48 HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SUN WITH ASSOCIATED SEAS
BUILDING BACK TO 8-10 FT BY SUN EVENING.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW MEXICO INTO
THE FAR NORTHERN GULF. SOUTHERLY FLOW IN THE GULF OF CALIFORNIA
HAS DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL PERSIST THROUGH
EARLY SAT. THE PRESSURE GRADIENT ACROSS THE REGION WILL THEN
TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT SOUTHWESTERLY
WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH
LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK NOCTURNAL
DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
LEVELS JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY


000
AXPZ20 KNHC 250302
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N83W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N96W TO 07N108W THEN RESUMES FROM 06N127W TO
05N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS
FROM 02N TO 08N BETWEEN 82W AND 91W...FROM 03N TO 06N BETWEEN
93W AND 98W...AND ALSO WITHIN 120 NM EITHER SIDE OF THE AXIS W
OF 132W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N109W THROUGH 20N115W TO 11N124W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A HIGH CENTER IS LOCATED NEAR 32N142W WITH A
RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO 16N107W. A
PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ ACROSS THE CENTRAL
WATERS. THE PRESSURE GRADIENT ACROSS THE W CENTRAL WATERS IS
TIGHT ENOUGH BETWEEN THESE FEATURES TO SUPPORT FRESH TO STRONG
NE-E TRADE WINDS WITH AN AREA OF SURROUNDING COMBINED SEAS OF 8-
11 FT. THESE CONDITIONS WILL PERSIST ACROSS THE SAME GENERAL
AREA THROUGH THE NEXT 48 HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SUN WITH ASSOCIATED SEAS
BUILDING BACK TO 8-10 FT BY SUN EVENING.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW MEXICO INTO
THE FAR NORTHERN GULF. SOUTHERLY FLOW IN THE GULF OF CALIFORNIA
HAS DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL PERSIST THROUGH
EARLY SAT. THE PRESSURE GRADIENT ACROSS THE REGION WILL THEN
TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT SOUTHWESTERLY
WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH
LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK NOCTURNAL
DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
LEVELS JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXPZ20 KNHC 250302
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT APR 25 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N83W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N96W TO 07N108W THEN RESUMES FROM 06N127W TO
05N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS
FROM 02N TO 08N BETWEEN 82W AND 91W...FROM 03N TO 06N BETWEEN
93W AND 98W...AND ALSO WITHIN 120 NM EITHER SIDE OF THE AXIS W
OF 132W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N109W THROUGH 20N115W TO 11N124W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A HIGH CENTER IS LOCATED NEAR 32N142W WITH A
RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO 16N107W. A
PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ ACROSS THE CENTRAL
WATERS. THE PRESSURE GRADIENT ACROSS THE W CENTRAL WATERS IS
TIGHT ENOUGH BETWEEN THESE FEATURES TO SUPPORT FRESH TO STRONG
NE-E TRADE WINDS WITH AN AREA OF SURROUNDING COMBINED SEAS OF 8-
11 FT. THESE CONDITIONS WILL PERSIST ACROSS THE SAME GENERAL
AREA THROUGH THE NEXT 48 HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SUN WITH ASSOCIATED SEAS
BUILDING BACK TO 8-10 FT BY SUN EVENING.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW MEXICO INTO
THE FAR NORTHERN GULF. SOUTHERLY FLOW IN THE GULF OF CALIFORNIA
HAS DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL PERSIST THROUGH
EARLY SAT. THE PRESSURE GRADIENT ACROSS THE REGION WILL THEN
TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT SOUTHWESTERLY
WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH
LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK NOCTURNAL
DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
LEVELS JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY


000
AXNT20 KNHC 250005
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 06N10W SW
TO 03N14W TO 03N18W WHERE THE INTERTROPICAL CONVERGENCE ZONE
AXIS CONTINUES TO 01S31W 02S40W TO THE NORTHERN COAST OF BRAZIL
NEAR 01S51W. SCATTERED MODERATE CONVECTION IS FROM 08S TO 01N W
OF 32W.

...DISCUSSION...

GULF OF MEXICO...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA IN THE SW NORTH ATLC...WHICH THEN
TRANSITIONS TO A STATIONARY FRONT NEAR FORT MYERS AND CONTINUES
ACROSS THE NE GULF ALONG 26N82W TO SE LOUISIANA NEAR 29N90W.
SOUTHEASTERLY TO SOUTHERLY WIND FLOW OF 5 TO 15 KT IS BANKING
LOW LEVEL MOISTURE ALONG THE NORTHERN GULF...THUS SUPPORTING FOG
ON THE NW BASIN N OF 26N W OF 90W AND SCATTERED MODERATE
CONVECTION AND TSTMS WITHIN 200 NM E OF THE STATIONARY FRONT N
OF 29N. OVER THE SE GULF...SOUTH OF THE FRONT...A WEAK CENTER OF
HIGH PRESSURE OF 1014 MB IS LOCATED NEAR 25N83W. FAIR WEATHER IS
ACROSS THE REMAINDER GULF S OF 25N BEING SUPPORTED BY DRY AIR
SUBSIDENCE FROM ALOFT. A 1017 MB HIGH OVER SOUTH CAROLINA AND
GEORGIA COASTAL WATERS WILL DRIFT E DURING THE NEXT 24 HOURS
EXTENDING A RIDGE AXIS SW ACROSS THE GULF. LOW PRESSURE WILL
START TO BUILD OVER THE WESTERN GULF BY SUNDAY MORNING
ASSOCIATED WITH THE NEXT FRONTAL BOUNDARY FORECAST TO EMERGE OFF
THE TEXAS AND LOUISIANA COASTS EARLY MONDAY. A SECONDARY FRONT
IS FORECAST TO EMERGE OFF THE NW GULF COAST EARLY TUESDAY.

CARIBBEAN SEA...

AN UPPER LEVEL RIDGE CENTERED OVER THE NW CARIBBEAN ALONG WITH
DEEP LAYER DRY AIR ACROSS THE CENTRAL AND EASTERN BASIN SUPPORT
STABLE CONDITIONS AND FAIR WEATHER. LOW LEVEL MOISTURE
ASSOCIATED WITH THE COLD FRONT OVER THE SW N ATLC IS BEING
ADVECTED TO THE NW CARIBBEAN BY N-NE WIND FLOW...THUS ENHANCING
ISOLATED SHOWERS AND TSTMS OVER NW AND SOUTHERN CUBA AND
ADJACENT WATERS. OTHERWISE...AN OVERALL WEAK PRESSURE GRADIENT
SUPPORT TRADES OF 15 KT S OF 16N BETWEEN 61W AND 80W AND
VARIABLE LIGHTER WINDS ELSEWHERE. SIMILAR SYNOPTIC CONDITIONS
EXPECTED THROUGH TUESDAY.

...HISPANIOLA...

SHALLOW MOISTURE ASSOCIATED WITH THE COLD FRONT OVER THE SW N
ATLC IS BEING ADVECTED BY NORTHERLY FLOW ACROSS THE WESTERN
ISLAND. THIS MOISTURE IS SUPPORTING CLOUDINESS OVER HAITI AND
WESTERN DOMINICAN REPUBLIC WITH POSSIBLE ISOLATED SHOWERS. A
MIDDLE LEVEL DIFFLUENT ENVIRONMENT OVER THE ISLAND MAY CONTINUE
TO ENHANCE SHOWERS THROUGH SAT NIGHT.

ATLANTIC OCEAN...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA FROM 30N65W SW TO 28N75W TO FORT MYERS WHERE
IT TRANSITIONS TO A STATIONARY FRONT ACROSS THE NE GULF.
SCATTERED SHOWERS AND TSTMS ARE AHEAD OF THE FRONT N OF 28N
BETWEEN 60W AND 68W. A SECOND COLD FROM EXTENDS FROM A 1010 MB
LOW NEAR 31N51W AND CONTINUES ALONG 25N59W TO 24N69W. NUMEROUS
MODERATE CONVECTION IS WITHIN 260 NM AHEAD OF THE FRONT N OF
23N. SURFACE RIDGING AND FAIR WEATHER PREVAILS ELSEWHERE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR



000
AXNT20 KNHC 250005
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 06N10W SW
TO 03N14W TO 03N18W WHERE THE INTERTROPICAL CONVERGENCE ZONE
AXIS CONTINUES TO 01S31W 02S40W TO THE NORTHERN COAST OF BRAZIL
NEAR 01S51W. SCATTERED MODERATE CONVECTION IS FROM 08S TO 01N W
OF 32W.

...DISCUSSION...

GULF OF MEXICO...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA IN THE SW NORTH ATLC...WHICH THEN
TRANSITIONS TO A STATIONARY FRONT NEAR FORT MYERS AND CONTINUES
ACROSS THE NE GULF ALONG 26N82W TO SE LOUISIANA NEAR 29N90W.
SOUTHEASTERLY TO SOUTHERLY WIND FLOW OF 5 TO 15 KT IS BANKING
LOW LEVEL MOISTURE ALONG THE NORTHERN GULF...THUS SUPPORTING FOG
ON THE NW BASIN N OF 26N W OF 90W AND SCATTERED MODERATE
CONVECTION AND TSTMS WITHIN 200 NM E OF THE STATIONARY FRONT N
OF 29N. OVER THE SE GULF...SOUTH OF THE FRONT...A WEAK CENTER OF
HIGH PRESSURE OF 1014 MB IS LOCATED NEAR 25N83W. FAIR WEATHER IS
ACROSS THE REMAINDER GULF S OF 25N BEING SUPPORTED BY DRY AIR
SUBSIDENCE FROM ALOFT. A 1017 MB HIGH OVER SOUTH CAROLINA AND
GEORGIA COASTAL WATERS WILL DRIFT E DURING THE NEXT 24 HOURS
EXTENDING A RIDGE AXIS SW ACROSS THE GULF. LOW PRESSURE WILL
START TO BUILD OVER THE WESTERN GULF BY SUNDAY MORNING
ASSOCIATED WITH THE NEXT FRONTAL BOUNDARY FORECAST TO EMERGE OFF
THE TEXAS AND LOUISIANA COASTS EARLY MONDAY. A SECONDARY FRONT
IS FORECAST TO EMERGE OFF THE NW GULF COAST EARLY TUESDAY.

CARIBBEAN SEA...

AN UPPER LEVEL RIDGE CENTERED OVER THE NW CARIBBEAN ALONG WITH
DEEP LAYER DRY AIR ACROSS THE CENTRAL AND EASTERN BASIN SUPPORT
STABLE CONDITIONS AND FAIR WEATHER. LOW LEVEL MOISTURE
ASSOCIATED WITH THE COLD FRONT OVER THE SW N ATLC IS BEING
ADVECTED TO THE NW CARIBBEAN BY N-NE WIND FLOW...THUS ENHANCING
ISOLATED SHOWERS AND TSTMS OVER NW AND SOUTHERN CUBA AND
ADJACENT WATERS. OTHERWISE...AN OVERALL WEAK PRESSURE GRADIENT
SUPPORT TRADES OF 15 KT S OF 16N BETWEEN 61W AND 80W AND
VARIABLE LIGHTER WINDS ELSEWHERE. SIMILAR SYNOPTIC CONDITIONS
EXPECTED THROUGH TUESDAY.

...HISPANIOLA...

SHALLOW MOISTURE ASSOCIATED WITH THE COLD FRONT OVER THE SW N
ATLC IS BEING ADVECTED BY NORTHERLY FLOW ACROSS THE WESTERN
ISLAND. THIS MOISTURE IS SUPPORTING CLOUDINESS OVER HAITI AND
WESTERN DOMINICAN REPUBLIC WITH POSSIBLE ISOLATED SHOWERS. A
MIDDLE LEVEL DIFFLUENT ENVIRONMENT OVER THE ISLAND MAY CONTINUE
TO ENHANCE SHOWERS THROUGH SAT NIGHT.

ATLANTIC OCEAN...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA FROM 30N65W SW TO 28N75W TO FORT MYERS WHERE
IT TRANSITIONS TO A STATIONARY FRONT ACROSS THE NE GULF.
SCATTERED SHOWERS AND TSTMS ARE AHEAD OF THE FRONT N OF 28N
BETWEEN 60W AND 68W. A SECOND COLD FROM EXTENDS FROM A 1010 MB
LOW NEAR 31N51W AND CONTINUES ALONG 25N59W TO 24N69W. NUMEROUS
MODERATE CONVECTION IS WITHIN 260 NM AHEAD OF THE FRONT N OF
23N. SURFACE RIDGING AND FAIR WEATHER PREVAILS ELSEWHERE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR


000
AXNT20 KNHC 250005
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 06N10W SW
TO 03N14W TO 03N18W WHERE THE INTERTROPICAL CONVERGENCE ZONE
AXIS CONTINUES TO 01S31W 02S40W TO THE NORTHERN COAST OF BRAZIL
NEAR 01S51W. SCATTERED MODERATE CONVECTION IS FROM 08S TO 01N W
OF 32W.

...DISCUSSION...

GULF OF MEXICO...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA IN THE SW NORTH ATLC...WHICH THEN
TRANSITIONS TO A STATIONARY FRONT NEAR FORT MYERS AND CONTINUES
ACROSS THE NE GULF ALONG 26N82W TO SE LOUISIANA NEAR 29N90W.
SOUTHEASTERLY TO SOUTHERLY WIND FLOW OF 5 TO 15 KT IS BANKING
LOW LEVEL MOISTURE ALONG THE NORTHERN GULF...THUS SUPPORTING FOG
ON THE NW BASIN N OF 26N W OF 90W AND SCATTERED MODERATE
CONVECTION AND TSTMS WITHIN 200 NM E OF THE STATIONARY FRONT N
OF 29N. OVER THE SE GULF...SOUTH OF THE FRONT...A WEAK CENTER OF
HIGH PRESSURE OF 1014 MB IS LOCATED NEAR 25N83W. FAIR WEATHER IS
ACROSS THE REMAINDER GULF S OF 25N BEING SUPPORTED BY DRY AIR
SUBSIDENCE FROM ALOFT. A 1017 MB HIGH OVER SOUTH CAROLINA AND
GEORGIA COASTAL WATERS WILL DRIFT E DURING THE NEXT 24 HOURS
EXTENDING A RIDGE AXIS SW ACROSS THE GULF. LOW PRESSURE WILL
START TO BUILD OVER THE WESTERN GULF BY SUNDAY MORNING
ASSOCIATED WITH THE NEXT FRONTAL BOUNDARY FORECAST TO EMERGE OFF
THE TEXAS AND LOUISIANA COASTS EARLY MONDAY. A SECONDARY FRONT
IS FORECAST TO EMERGE OFF THE NW GULF COAST EARLY TUESDAY.

CARIBBEAN SEA...

AN UPPER LEVEL RIDGE CENTERED OVER THE NW CARIBBEAN ALONG WITH
DEEP LAYER DRY AIR ACROSS THE CENTRAL AND EASTERN BASIN SUPPORT
STABLE CONDITIONS AND FAIR WEATHER. LOW LEVEL MOISTURE
ASSOCIATED WITH THE COLD FRONT OVER THE SW N ATLC IS BEING
ADVECTED TO THE NW CARIBBEAN BY N-NE WIND FLOW...THUS ENHANCING
ISOLATED SHOWERS AND TSTMS OVER NW AND SOUTHERN CUBA AND
ADJACENT WATERS. OTHERWISE...AN OVERALL WEAK PRESSURE GRADIENT
SUPPORT TRADES OF 15 KT S OF 16N BETWEEN 61W AND 80W AND
VARIABLE LIGHTER WINDS ELSEWHERE. SIMILAR SYNOPTIC CONDITIONS
EXPECTED THROUGH TUESDAY.

...HISPANIOLA...

SHALLOW MOISTURE ASSOCIATED WITH THE COLD FRONT OVER THE SW N
ATLC IS BEING ADVECTED BY NORTHERLY FLOW ACROSS THE WESTERN
ISLAND. THIS MOISTURE IS SUPPORTING CLOUDINESS OVER HAITI AND
WESTERN DOMINICAN REPUBLIC WITH POSSIBLE ISOLATED SHOWERS. A
MIDDLE LEVEL DIFFLUENT ENVIRONMENT OVER THE ISLAND MAY CONTINUE
TO ENHANCE SHOWERS THROUGH SAT NIGHT.

ATLANTIC OCEAN...

A MIDDLE TO UPPER LEVEL LOW CENTERED OVER MAINE SUPPORTS A
COMPLEX SURFACE LOW PRESSURE SYSTEM OVER THE W-NW ATLC. THE LOW
AND ASSOCIATED TROUGHING ALOFT SUPPORTS A COLD FRONT ENTERING
THE DISCUSSION AREA FROM 30N65W SW TO 28N75W TO FORT MYERS WHERE
IT TRANSITIONS TO A STATIONARY FRONT ACROSS THE NE GULF.
SCATTERED SHOWERS AND TSTMS ARE AHEAD OF THE FRONT N OF 28N
BETWEEN 60W AND 68W. A SECOND COLD FROM EXTENDS FROM A 1010 MB
LOW NEAR 31N51W AND CONTINUES ALONG 25N59W TO 24N69W. NUMEROUS
MODERATE CONVECTION IS WITHIN 260 NM AHEAD OF THE FRONT N OF
23N. SURFACE RIDGING AND FAIR WEATHER PREVAILS ELSEWHERE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR



000
AXPZ20 KNHC 242121
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N82W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N97W TO 07N107W THEN RESUMES FROM 06N125W
TO 04N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION
IS FROM 02N TO 07N BETWEEN 78W AND 90W...AND FROM 02N TO 07N W
OF 132W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM EITHER
SIDE OF THE AXIS BETWEEN 125W AND 130W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N110W THROUGH 20N120W TO 11N130W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A 1029 MB HIGH CENTER IS LOCATED NEAR 32N142W
WITH A RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO
18N104W. A PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ...THE
EASTERN ONE EXTENDING FROM 15N104W TO 08N109W...AND THE WESTERN
ONE FROM 14N120W TO 05N132W. SCATTERED MODERATE CONVECTION IS
FROM 05N TO 10N BETWEEN 118W AND 123W. THE PRESSURE GRADIENT
ACROSS THE W CENTRAL WATERS IS TIGHT ENOUGH BETWEEN THESE
FEATURES TO SUPPORT FRESH TO STRONG NE-E TRADE WINDS WITH AN
AREA OF SURROUNDING COMBINED SEAS OF 8-11 FT. THESE CONDITIONS
WILL PERSIST ACROSS THE SAME GENERAL AREA THROUGH THE NEXT 48
HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SAT EVENING WHICH WILL THEN
PERSIST THROUGH SUN WITH ASSOCIATED SEAS BUILDING BACK TO 8-11
FT BY SUN AFTERNOON.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW
CALIFORNIA NEAR 32N115W TO 29N114W. SOUTHERLY FLOW IN THE GULF
OF CALIFORNIA HAVE DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL
PERSIST THROUGH EARLY SAT. THE PRESSURE GRADIENT ACROSS THE
REGION WILL TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT
SOUTHWESTERLY WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT
EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH TO
STRONG LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK
NOCTURNAL DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
TO STRONG JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXPZ20 KNHC 242121
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N82W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N97W TO 07N107W THEN RESUMES FROM 06N125W
TO 04N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION
IS FROM 02N TO 07N BETWEEN 78W AND 90W...AND FROM 02N TO 07N W
OF 132W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM EITHER
SIDE OF THE AXIS BETWEEN 125W AND 130W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N110W THROUGH 20N120W TO 11N130W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A 1029 MB HIGH CENTER IS LOCATED NEAR 32N142W
WITH A RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO
18N104W. A PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ...THE
EASTERN ONE EXTENDING FROM 15N104W TO 08N109W...AND THE WESTERN
ONE FROM 14N120W TO 05N132W. SCATTERED MODERATE CONVECTION IS
FROM 05N TO 10N BETWEEN 118W AND 123W. THE PRESSURE GRADIENT
ACROSS THE W CENTRAL WATERS IS TIGHT ENOUGH BETWEEN THESE
FEATURES TO SUPPORT FRESH TO STRONG NE-E TRADE WINDS WITH AN
AREA OF SURROUNDING COMBINED SEAS OF 8-11 FT. THESE CONDITIONS
WILL PERSIST ACROSS THE SAME GENERAL AREA THROUGH THE NEXT 48
HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SAT EVENING WHICH WILL THEN
PERSIST THROUGH SUN WITH ASSOCIATED SEAS BUILDING BACK TO 8-11
FT BY SUN AFTERNOON.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW
CALIFORNIA NEAR 32N115W TO 29N114W. SOUTHERLY FLOW IN THE GULF
OF CALIFORNIA HAVE DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL
PERSIST THROUGH EARLY SAT. THE PRESSURE GRADIENT ACROSS THE
REGION WILL TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT
SOUTHWESTERLY WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT
EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH TO
STRONG LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK
NOCTURNAL DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
TO STRONG JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXPZ20 KNHC 242121
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N82W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N97W TO 07N107W THEN RESUMES FROM 06N125W
TO 04N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION
IS FROM 02N TO 07N BETWEEN 78W AND 90W...AND FROM 02N TO 07N W
OF 132W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM EITHER
SIDE OF THE AXIS BETWEEN 125W AND 130W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N110W THROUGH 20N120W TO 11N130W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A 1029 MB HIGH CENTER IS LOCATED NEAR 32N142W
WITH A RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO
18N104W. A PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ...THE
EASTERN ONE EXTENDING FROM 15N104W TO 08N109W...AND THE WESTERN
ONE FROM 14N120W TO 05N132W. SCATTERED MODERATE CONVECTION IS
FROM 05N TO 10N BETWEEN 118W AND 123W. THE PRESSURE GRADIENT
ACROSS THE W CENTRAL WATERS IS TIGHT ENOUGH BETWEEN THESE
FEATURES TO SUPPORT FRESH TO STRONG NE-E TRADE WINDS WITH AN
AREA OF SURROUNDING COMBINED SEAS OF 8-11 FT. THESE CONDITIONS
WILL PERSIST ACROSS THE SAME GENERAL AREA THROUGH THE NEXT 48
HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SAT EVENING WHICH WILL THEN
PERSIST THROUGH SUN WITH ASSOCIATED SEAS BUILDING BACK TO 8-11
FT BY SUN AFTERNOON.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW
CALIFORNIA NEAR 32N115W TO 29N114W. SOUTHERLY FLOW IN THE GULF
OF CALIFORNIA HAVE DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL
PERSIST THROUGH EARLY SAT. THE PRESSURE GRADIENT ACROSS THE
REGION WILL TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT
SOUTHWESTERLY WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT
EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH TO
STRONG LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK
NOCTURNAL DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
TO STRONG JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXPZ20 KNHC 242121
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH AXIS EXTENDS FROM 09N82W TO 06N96W. THE ITCZ
AXIS EXTENDS FROM 06N97W TO 07N107W THEN RESUMES FROM 06N125W
TO 04N140W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION
IS FROM 02N TO 07N BETWEEN 78W AND 90W...AND FROM 02N TO 07N W
OF 132W. SCATTERED MODERATE CONVECTION IS WITHIN 60 NM EITHER
SIDE OF THE AXIS BETWEEN 125W AND 130W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH DOMINATES THE NW AND N CENTRAL
WATERS EXTENDING FROM 32N110W THROUGH 20N120W TO 11N130W. WATER
VAPOR SATELLITE IMAGERY SHOWS MAINLY DRY AND STABLE AIR W OF THE
TROUGH AXIS. A LARGE AND EXPANSIVE UPPER LEVEL ANTICYCLONE IS
ANCHORED OVER THE NW CARIBBEAN SEA WITH ANTICYCLONIC FLOW ALOFT
AROUND IT ACROSS THE NE TROPICAL PACIFIC WATERS TO THE E OF THE
UPPER TROUGH. UPPER LEVEL SW FLOW IS TRANSPORTING DEEP TROPICAL
MOISTURE FROM THE ITCZ TO THE NE ACROSS N CENTRAL MEXICO AHEAD
OF THE UPPER TROUGH AND AROUND THE UPPER ANTICYCLONE.

AT THE SURFACE...A 1029 MB HIGH CENTER IS LOCATED NEAR 32N142W
WITH A RIDGE AXIS EXTENDING TO THE SE THROUGH 28N127W TO
18N104W. A PAIR OF TROUGHS ARE EMBEDDED IN THE ITCZ...THE
EASTERN ONE EXTENDING FROM 15N104W TO 08N109W...AND THE WESTERN
ONE FROM 14N120W TO 05N132W. SCATTERED MODERATE CONVECTION IS
FROM 05N TO 10N BETWEEN 118W AND 123W. THE PRESSURE GRADIENT
ACROSS THE W CENTRAL WATERS IS TIGHT ENOUGH BETWEEN THESE
FEATURES TO SUPPORT FRESH TO STRONG NE-E TRADE WINDS WITH AN
AREA OF SURROUNDING COMBINED SEAS OF 8-11 FT. THESE CONDITIONS
WILL PERSIST ACROSS THE SAME GENERAL AREA THROUGH THE NEXT 48
HOURS OR SO.

FRESH TO STRONG NORTHERLY WINDS ARE OCCURRING JUST N OF THE
AREA AROUND AND OFFSHORE OF POINT CONCEPTION CALIFORNIA. THESE
WINDS ARE HELPING TO MAINTAIN NORTHERLY SWELL WHICH IS SEEPING
INTO THE N CENTRAL DISCUSSION WATERS. THIS SWELL WILL DECAY TO
LESS THAN 8 FT BY SAT MORNING. A NEW ROUND OF FRESH TO STRONG NW-
N WINDS WILL DEVELOP OFFSHORE OF SOUTHERN CALIFORNIA AND ALSO
OFFSHORE OF BAJA CALIFORNIA NORTE SAT EVENING WHICH WILL THEN
PERSIST THROUGH SUN WITH ASSOCIATED SEAS BUILDING BACK TO 8-11
FT BY SUN AFTERNOON.

GULF OF CALIFORNIA...TROUGHING EXTENDS FROM FAR NW
CALIFORNIA NEAR 32N115W TO 29N114W. SOUTHERLY FLOW IN THE GULF
OF CALIFORNIA HAVE DIMINISHED SLIGHTLY TO 15-20 KT WHICH WILL
PERSIST THROUGH EARLY SAT. THE PRESSURE GRADIENT ACROSS THE
REGION WILL TIGHTEN SAT AFTERNOON WITH A POCKET OF 20-30 KT
SOUTHWESTERLY WINDS FROM 29.5N TO 30.5N BY 00 UTC SUN INTO SAT
EVENING.

GULF OF PAPAGAYO...GAP WINDS ARE FORECAST TO PULSE TO FRESH TO
STRONG LEVELS AGAIN LATE TONIGHT INTO EARLY SAT DURING PEAK
NOCTURNAL DRAINAGE FLOW.

GULF OF PANAMA...NORTHERLY WINDS WILL BRIEFLY INCREASE TO FRESH
TO STRONG JUST SW OF THE IMMEDIATE GULF LATE TONIGHT THROUGH THE
MORNING SAT AS THE LOCAL PRESSURE GRADIENT BRIEFLY TIGHTENS.

$$
LEWITSKY



000
AXNT20 KNHC 241747
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 11N16W TO
05N18W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
05N18W TO THE EQUATOR NEAR 29W. SCATTERED MODERATE CONVECTION IS
FROM 01N-04N BETWEEN 06W-18W.

...DISCUSSION...

GULF OF MEXICO...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OVER THE
NORTHWESTERN NORTH ATLC OFF THE COAST OF NEW ENGLAND. THE LOW
AND ASSOCIATED TROUGHING SUPPORTS A COLD FRONT ENTERING THE
DISCUSSION AREA IN THE SW NORTH ATLC EXTENDING ACROSS THE
NORTHERN FLORIDA PENINSULA AND ENTERING THE GULF WATERS NEAR
29N83W TO 28N87W WHERE IT BECOMES STATIONARY TO THE COAST OF
CENTRAL LOUISIANA NEAR 30N92W. WHILE THE COLD FRONT REMAINS
RELATIVELY PRECIPITATION-FREE THIS AFTERNOON...S-SE RETURN FLOW
ACROSS THE WESTERN GULF IS ADVECTING MOISTURE ACROSS THE FRONTAL
ZONE AND RESULTING IN SCATTERED SHOWERS AND ISOLATED TSTMS N OF
26N W OF 90W...WITH MORE WIDESPREAD COVERAGE ACROSS INLAND
EASTERN TEXAS AND THE ARKLATEX REGION. OTHERWISE...SOUTH OF THE
FRONT...A WEAK RIDGE AXIS IS EXPECTED TO EXTEND FROM THE SE GULF
TO THE EAST-CENTRAL COAST OF MEXICO THROUGH LATE SUNDAY
PROVIDING GENERALLY GENTLE TO MODERATE BREEZE CONDITIONS.
THEREAFTER...A DEVELOPING AREA OF LOW PRESSURE ACROSS THE
SOUTHERN PLAINS WILL SUPPORT A FRONTAL BOUNDARY FORECAST TO
EMERGE OFF THE TEXAS AND LOUISIANA COASTS EARLY MONDAY AND
QUICKLY LIFT NORTHWARD BY LATE MONDAY. THE LOW PRESSURE AREA IS
EXPECTED TO SKIRT THE GULF COAST WITH A SECONDARY FRONT TO
EMERGE OFF THE NW GULF COAST EARLY TUESDAY. STRONGER NORTHERLY
WINDS ARE ANTICIPATED BEHIND THIS SECONDARY COLD FRONT ACROSS
THE WESTERN GULF WATERS BEGINNING LATE TUESDAY THROUGH EARLY
THURSDAY.

CARIBBEAN SEA...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER THE
YUCATAN PENINSULA NEAR 19N89W WITH A MAJORITY OF THE BASIN UNDER
THE INFLUENCE OF NORTHERLY FLOW ALOFT ON THE EASTERN PERIPHERY
OF THE RIDGING. WATER VAPOR IMAGERY INDICATES THIS FLOW REMAINS
VERY DRY WITH STRONG SUBSIDENCE RESULTING IN MOSTLY CLEAR SKIES
AND FAIR CONDITIONS ACROSS THE CARIBBEAN WATERS. WHILE AN
OVERALL WEAK PRESSURE GRADIENT CONTINUES TO MAINTAIN MODERATE TO
FRESH BREEZE CONDITIONS...SLIGHTLY STRONGER BREEZE CONDITIONS
ARE NOTED ON THE LATEST ASCAT PASS FROM 24/1414 UTC WITHIN 120
NM OF THE COAST OF COLOMBIA BETWEEN 72W-77W. IT IS ALSO LIKELY
THAT STRONGER TRADES ARE OCCURRING IN THE GULF OF HONDURAS DUE
TO MORE LOCALIZED EFFECTS. OTHERWISE...A SURFACE RIDGE AXIS
EXTENDS ALONG 20N FROM THE CENTRAL ATLC TO 80W PROVIDING FOR
VERY SIMILAR SYNOPTIC CONDITIONS EXPECTED THROUGH TUESDAY.

...HISPANIOLA...
CURRENTLY MOSTLY CLEAR SKIES PREVAIL UNDER STRONG SUBSIDENCE
WITHIN DRY AIR ALOFT. THESE OVERALL CONDITIONS ARE EXPECTED TO
PERSIST THE NEXT FEW DAYS AS A SURFACE RIDGE AXIS EXTENDS ALONG
20N FROM THE CENTRAL ATLC TO 80W.

ATLANTIC OCEAN...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OFF THE COAST OF
NEW ENGLAND NEAR 44N67W WITH SHORTWAVE ENERGY ON THE SOUTHERN
PERIPHERY OF THE CYCLONE IN THE VICINITY OF 35N64W. GIVEN THE
DYNAMICS IN PLACE...THEY SUPPORT A COLD FRONT ANALYZED FROM
BERMUDA NEAR 32N64W TO 31N68W THAT BECOMES A WARM FRONT TO THE
NW INTO A 1010 MB LOW CENTERED NEAR 33N74W. ANOTHER COLD FRONT
TRAILS TO THE SW FROM THIS LOW TO THE FLORIDA PENINSULA NEAR
29N81W. MOST OF THE DYNAMICAL ENERGY IS E OF 70W WHICH IS
RESULTING IN SCATTERED SHOWERS AND ISOLATED TSTMS WITHIN 180 NM
EAST OF THE EASTERNMOST COLD FRONT AND BETWEEN 30N-32N BETWEEN
67W-72W. IN ADDITION...A WEAK PRE-FRONTAL TROUGH IS ANALYZED SE
OF THE COLD FRONT FROM 29N76W ACROSS THE NW BAHAMAS TO THE
FLORIDA STRAITS NEAR 24N80W. FARTHER EAST...ANOTHER MID-LEVEL
SHORTWAVE TROUGH...EMBEDDED WITHIN THE LARGER PARENT TROUGH
PREVIOUSLY MENTIONED...IS IN THE VICINITY OF 30N58W AND SUPPORTS
A COLD FRONT EXTENDING FROM 31N54W TO 26N60W TO 25N69W. ISOLATED
SHOWERS AND TSTMS ARE OCCURRING WITHIN 75 NM EITHER SIDE OF THE
FRONT W OF 58W...AND FROM 26N-32N BETWEEN 45W-56W. AS ENERGY
ASSOCIATED WITH THE SHORTWAVE MOVES NORTHEASTWARD...GLOBAL MODEL
GUIDANCE INDICATES CYCLOGENESIS WILL OCCUR N OF 32N WITH A
SLIGHT POSSIBILITY OF NEAR GALE CONDITIONS NORTH OF THE
DISCUSSION AREA IN THE VICINITY OF 35N42W WITH THE NEWLY
DEVELOPED LOW PRESSURE AREA. FINALLY...A PAIR OF MERGING 1022 MB
HIGHS INFLUENCE THE REMAINDER OF THE EASTERN AND CENTRAL ATLC
CENTERED IN THE VICINITY OF 25N30W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
HUFFMAN


000
AXNT20 KNHC 241747
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 11N16W TO
05N18W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
05N18W TO THE EQUATOR NEAR 29W. SCATTERED MODERATE CONVECTION IS
FROM 01N-04N BETWEEN 06W-18W.

...DISCUSSION...

GULF OF MEXICO...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OVER THE
NORTHWESTERN NORTH ATLC OFF THE COAST OF NEW ENGLAND. THE LOW
AND ASSOCIATED TROUGHING SUPPORTS A COLD FRONT ENTERING THE
DISCUSSION AREA IN THE SW NORTH ATLC EXTENDING ACROSS THE
NORTHERN FLORIDA PENINSULA AND ENTERING THE GULF WATERS NEAR
29N83W TO 28N87W WHERE IT BECOMES STATIONARY TO THE COAST OF
CENTRAL LOUISIANA NEAR 30N92W. WHILE THE COLD FRONT REMAINS
RELATIVELY PRECIPITATION-FREE THIS AFTERNOON...S-SE RETURN FLOW
ACROSS THE WESTERN GULF IS ADVECTING MOISTURE ACROSS THE FRONTAL
ZONE AND RESULTING IN SCATTERED SHOWERS AND ISOLATED TSTMS N OF
26N W OF 90W...WITH MORE WIDESPREAD COVERAGE ACROSS INLAND
EASTERN TEXAS AND THE ARKLATEX REGION. OTHERWISE...SOUTH OF THE
FRONT...A WEAK RIDGE AXIS IS EXPECTED TO EXTEND FROM THE SE GULF
TO THE EAST-CENTRAL COAST OF MEXICO THROUGH LATE SUNDAY
PROVIDING GENERALLY GENTLE TO MODERATE BREEZE CONDITIONS.
THEREAFTER...A DEVELOPING AREA OF LOW PRESSURE ACROSS THE
SOUTHERN PLAINS WILL SUPPORT A FRONTAL BOUNDARY FORECAST TO
EMERGE OFF THE TEXAS AND LOUISIANA COASTS EARLY MONDAY AND
QUICKLY LIFT NORTHWARD BY LATE MONDAY. THE LOW PRESSURE AREA IS
EXPECTED TO SKIRT THE GULF COAST WITH A SECONDARY FRONT TO
EMERGE OFF THE NW GULF COAST EARLY TUESDAY. STRONGER NORTHERLY
WINDS ARE ANTICIPATED BEHIND THIS SECONDARY COLD FRONT ACROSS
THE WESTERN GULF WATERS BEGINNING LATE TUESDAY THROUGH EARLY
THURSDAY.

CARIBBEAN SEA...
AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER THE
YUCATAN PENINSULA NEAR 19N89W WITH A MAJORITY OF THE BASIN UNDER
THE INFLUENCE OF NORTHERLY FLOW ALOFT ON THE EASTERN PERIPHERY
OF THE RIDGING. WATER VAPOR IMAGERY INDICATES THIS FLOW REMAINS
VERY DRY WITH STRONG SUBSIDENCE RESULTING IN MOSTLY CLEAR SKIES
AND FAIR CONDITIONS ACROSS THE CARIBBEAN WATERS. WHILE AN
OVERALL WEAK PRESSURE GRADIENT CONTINUES TO MAINTAIN MODERATE TO
FRESH BREEZE CONDITIONS...SLIGHTLY STRONGER BREEZE CONDITIONS
ARE NOTED ON THE LATEST ASCAT PASS FROM 24/1414 UTC WITHIN 120
NM OF THE COAST OF COLOMBIA BETWEEN 72W-77W. IT IS ALSO LIKELY
THAT STRONGER TRADES ARE OCCURRING IN THE GULF OF HONDURAS DUE
TO MORE LOCALIZED EFFECTS. OTHERWISE...A SURFACE RIDGE AXIS
EXTENDS ALONG 20N FROM THE CENTRAL ATLC TO 80W PROVIDING FOR
VERY SIMILAR SYNOPTIC CONDITIONS EXPECTED THROUGH TUESDAY.

...HISPANIOLA...
CURRENTLY MOSTLY CLEAR SKIES PREVAIL UNDER STRONG SUBSIDENCE
WITHIN DRY AIR ALOFT. THESE OVERALL CONDITIONS ARE EXPECTED TO
PERSIST THE NEXT FEW DAYS AS A SURFACE RIDGE AXIS EXTENDS ALONG
20N FROM THE CENTRAL ATLC TO 80W.

ATLANTIC OCEAN...
A COMPLEX MIDDLE TO UPPER LEVEL LOW IS CENTERED OFF THE COAST OF
NEW ENGLAND NEAR 44N67W WITH SHORTWAVE ENERGY ON THE SOUTHERN
PERIPHERY OF THE CYCLONE IN THE VICINITY OF 35N64W. GIVEN THE
DYNAMICS IN PLACE...THEY SUPPORT A COLD FRONT ANALYZED FROM
BERMUDA NEAR 32N64W TO 31N68W THAT BECOMES A WARM FRONT TO THE
NW INTO A 1010 MB LOW CENTERED NEAR 33N74W. ANOTHER COLD FRONT
TRAILS TO THE SW FROM THIS LOW TO THE FLORIDA PENINSULA NEAR
29N81W. MOST OF THE DYNAMICAL ENERGY IS E OF 70W WHICH IS
RESULTING IN SCATTERED SHOWERS AND ISOLATED TSTMS WITHIN 180 NM
EAST OF THE EASTERNMOST COLD FRONT AND BETWEEN 30N-32N BETWEEN
67W-72W. IN ADDITION...A WEAK PRE-FRONTAL TROUGH IS ANALYZED SE
OF THE COLD FRONT FROM 29N76W ACROSS THE NW BAHAMAS TO THE
FLORIDA STRAITS NEAR 24N80W. FARTHER EAST...ANOTHER MID-LEVEL
SHORTWAVE TROUGH...EMBEDDED WITHIN THE LARGER PARENT TROUGH
PREVIOUSLY MENTIONED...IS IN THE VICINITY OF 30N58W AND SUPPORTS
A COLD FRONT EXTENDING FROM 31N54W TO 26N60W TO 25N69W. ISOLATED
SHOWERS AND TSTMS ARE OCCURRING WITHIN 75 NM EITHER SIDE OF THE
FRONT W OF 58W...AND FROM 26N-32N BETWEEN 45W-56W. AS ENERGY
ASSOCIATED WITH THE SHORTWAVE MOVES NORTHEASTWARD...GLOBAL MODEL
GUIDANCE INDICATES CYCLOGENESIS WILL OCCUR N OF 32N WITH A
SLIGHT POSSIBILITY OF NEAR GALE CONDITIONS NORTH OF THE
DISCUSSION AREA IN THE VICINITY OF 35N42W WITH THE NEWLY
DEVELOPED LOW PRESSURE AREA. FINALLY...A PAIR OF MERGING 1022 MB
HIGHS INFLUENCE THE REMAINDER OF THE EASTERN AND CENTRAL ATLC
CENTERED IN THE VICINITY OF 25N30W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
HUFFMAN



000
AXPZ20 KNHC 241527
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 06N96W TO 06N112W TO 07N119W THROUGH LOW
PRES 1010 MB NEAR 07N121W TO 04N125W TO 04N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF LOW.

...DISCUSSION...

A RIDGE-TROUGH-RIDGE UPPER LEVEL PATTERN CONTINUES ACROSS THE
AREA THIS MORNING...AND PERSISTS DUE TO THE LARGE DOWNSTREAM
BLOCKING RIDGE ACROSS THE GULF OF MEXICO AND FAR E PACIFIC E OF
105W. A MIDDLE TO UPPER LAYER TROUGH DOMINATES MOST OF THE AREA
N OF 10N AND W OF 105W...AND EXTENDS N ACROSS THE NE PACIFIC AND
WESTERN U.S. NUMEROUS SHORT WAVE CAN BE SEEN IN WATER VAPOR
IMAGERY MOVING THROUGH THIS MEAN CIRCULATION...AND ARE GRADUALLY
ERODING THE WESTERN PERIPHERY OF THE BLOCKING RIDGE. A 70-90 KT
UPPER JET IS MOVING THROUGH THE BASE OF THE TROUGH ALONG 14-16N
AND ACCELERATES TO 85-100 PLUS KT AS SW WINDS LIFT OUT OF THE
TROUGH AND OVER THE GULF OF MEXICO RIDGE. ABUNDANT MIDDLE TO
UPPER LEVEL MOISTURE EMBEDDED IN THIS FLOW IS STREAMING N-NE
AHEAD OF TROUGH ACROSS WESTERN MEXICO...TEXAS AND THE GULF COAST
STATES.

A 1029 MB HIGH IS CENTERED NEAR 34N143W AND ANCHORS A BROAD
RIDGE ACROSS THE NORTH AND WESTERN WATERS...EXTENDING FROM THE
HIGH TO NEAR 16N108W. OVERNIGHT SCATTEROMETER DATA SHOWED AN
AREA OF FRESH TO STRONG TRADE WINDS IN A TRIANGULAR AREA ROUGHLY
DEFINED FROM 23N140W TO 20N132W TO 10N124W TO 04N140W WHERE NE
TO E WINDS WERE 20-25 KT AND SEAS RUNNING 9 TO 12 FT. THE HIGH
WILL SHIFT SLOWLY SE AND WEAKEN SLIGHTLY OVER THE WEEKEND WHICH
WILL GRADUALLY REDUCE THE AREA OF STRONG TRADES TO BETWEEN 10N
AND 16N AND W OF 124W BY SUN.

STRONG NWLY WINDS ACROSS THE CALIFORNIA COASTAL WATERS ARE
GENERATING NORTHERLY SWELL THAT IS MOVING S AND ACROSS NE
PORTIONS OF THE AREA...WITH SEAS PRESENTLY 8 TO 11 FT NW OF A
LINE FROM 30N117W TO 26N117W TO 20N124W TO 23N140W. THIS SWELL
WILL GRADUALLY FADE THROUGH SAT BEFORE A NEW PULSE OF NORTHERLY
SWELL INVADES THESE NE WATERS SAT NIGHT THROUGH SUN AND BUILDS
SEAS 8 TO 10 FT N OF 25N.

MODEL GUIDANCE INDICATES W TO SW WINDS 20-25 KT ACROSS THE
EXTREME NORTHERN GULF OF CALIFORNIA THIS MORNING OCCURRING E OF
A SURFACE TROUGH EXTENDING FROM SOUTHERN CALIFORNIA INTO THE N
HALF OF THE GULF. THIS TROUGH IS EXPECTED TO LINGER IN THIS
GENERAL VICINITY OVER THE WEEKEND...BUT THE PRESSURE GRADIENT ON
THE EAST SIDE WILL WEAKEN...WITH WINDS EXPECTED TO REMAIN AROUND
15-20 KT.

SOUTHEAST OF THE SURFACE RIDGE...LIGHT TO MODERATE VARIABLE
WINDS PREVAIL ACROSS THE EASTERN WATERS. WEAK SOUTHWESTERLY
WINDS WERE OBSERVED BY OVERNIGHT SCATTEROMETER PASSES E OF
96W...AND SUGGEST THAT THE EASTERN PACIFIC MONSOONAL CIRCULATION
IS GRADUALLY EVOLVING. A WEAK EASTERLY WAVE HAS EMERGED OFF OF
COLOMBIA AND SOUTH AMERICA AND IS MOVING WESTWARD ACROSS THE FAR
EASTERN PACIFIC...AND HAS HELPED TO TRIGGER SEVERAL CLUSTERS OF
DEEP CONVECTION DESCRIBED ABOVE E OF 98W. THIS ACTIVE WEATHER IS
EXPECTED TO SHIFT WESTWARD DURING THE NEXT 24 HOURS.

$$
STRIPLING



000
AXPZ20 KNHC 241527
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 06N96W TO 06N112W TO 07N119W THROUGH LOW
PRES 1010 MB NEAR 07N121W TO 04N125W TO 04N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF LOW.

...DISCUSSION...

A RIDGE-TROUGH-RIDGE UPPER LEVEL PATTERN CONTINUES ACROSS THE
AREA THIS MORNING...AND PERSISTS DUE TO THE LARGE DOWNSTREAM
BLOCKING RIDGE ACROSS THE GULF OF MEXICO AND FAR E PACIFIC E OF
105W. A MIDDLE TO UPPER LAYER TROUGH DOMINATES MOST OF THE AREA
N OF 10N AND W OF 105W...AND EXTENDS N ACROSS THE NE PACIFIC AND
WESTERN U.S. NUMEROUS SHORT WAVE CAN BE SEEN IN WATER VAPOR
IMAGERY MOVING THROUGH THIS MEAN CIRCULATION...AND ARE GRADUALLY
ERODING THE WESTERN PERIPHERY OF THE BLOCKING RIDGE. A 70-90 KT
UPPER JET IS MOVING THROUGH THE BASE OF THE TROUGH ALONG 14-16N
AND ACCELERATES TO 85-100 PLUS KT AS SW WINDS LIFT OUT OF THE
TROUGH AND OVER THE GULF OF MEXICO RIDGE. ABUNDANT MIDDLE TO
UPPER LEVEL MOISTURE EMBEDDED IN THIS FLOW IS STREAMING N-NE
AHEAD OF TROUGH ACROSS WESTERN MEXICO...TEXAS AND THE GULF COAST
STATES.

A 1029 MB HIGH IS CENTERED NEAR 34N143W AND ANCHORS A BROAD
RIDGE ACROSS THE NORTH AND WESTERN WATERS...EXTENDING FROM THE
HIGH TO NEAR 16N108W. OVERNIGHT SCATTEROMETER DATA SHOWED AN
AREA OF FRESH TO STRONG TRADE WINDS IN A TRIANGULAR AREA ROUGHLY
DEFINED FROM 23N140W TO 20N132W TO 10N124W TO 04N140W WHERE NE
TO E WINDS WERE 20-25 KT AND SEAS RUNNING 9 TO 12 FT. THE HIGH
WILL SHIFT SLOWLY SE AND WEAKEN SLIGHTLY OVER THE WEEKEND WHICH
WILL GRADUALLY REDUCE THE AREA OF STRONG TRADES TO BETWEEN 10N
AND 16N AND W OF 124W BY SUN.

STRONG NWLY WINDS ACROSS THE CALIFORNIA COASTAL WATERS ARE
GENERATING NORTHERLY SWELL THAT IS MOVING S AND ACROSS NE
PORTIONS OF THE AREA...WITH SEAS PRESENTLY 8 TO 11 FT NW OF A
LINE FROM 30N117W TO 26N117W TO 20N124W TO 23N140W. THIS SWELL
WILL GRADUALLY FADE THROUGH SAT BEFORE A NEW PULSE OF NORTHERLY
SWELL INVADES THESE NE WATERS SAT NIGHT THROUGH SUN AND BUILDS
SEAS 8 TO 10 FT N OF 25N.

MODEL GUIDANCE INDICATES W TO SW WINDS 20-25 KT ACROSS THE
EXTREME NORTHERN GULF OF CALIFORNIA THIS MORNING OCCURRING E OF
A SURFACE TROUGH EXTENDING FROM SOUTHERN CALIFORNIA INTO THE N
HALF OF THE GULF. THIS TROUGH IS EXPECTED TO LINGER IN THIS
GENERAL VICINITY OVER THE WEEKEND...BUT THE PRESSURE GRADIENT ON
THE EAST SIDE WILL WEAKEN...WITH WINDS EXPECTED TO REMAIN AROUND
15-20 KT.

SOUTHEAST OF THE SURFACE RIDGE...LIGHT TO MODERATE VARIABLE
WINDS PREVAIL ACROSS THE EASTERN WATERS. WEAK SOUTHWESTERLY
WINDS WERE OBSERVED BY OVERNIGHT SCATTEROMETER PASSES E OF
96W...AND SUGGEST THAT THE EASTERN PACIFIC MONSOONAL CIRCULATION
IS GRADUALLY EVOLVING. A WEAK EASTERLY WAVE HAS EMERGED OFF OF
COLOMBIA AND SOUTH AMERICA AND IS MOVING WESTWARD ACROSS THE FAR
EASTERN PACIFIC...AND HAS HELPED TO TRIGGER SEVERAL CLUSTERS OF
DEEP CONVECTION DESCRIBED ABOVE E OF 98W. THIS ACTIVE WEATHER IS
EXPECTED TO SHIFT WESTWARD DURING THE NEXT 24 HOURS.

$$
STRIPLING



000
AXPZ20 KNHC 241527
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 06N96W TO 06N112W TO 07N119W THROUGH LOW
PRES 1010 MB NEAR 07N121W TO 04N125W TO 04N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF LOW.

...DISCUSSION...

A RIDGE-TROUGH-RIDGE UPPER LEVEL PATTERN CONTINUES ACROSS THE
AREA THIS MORNING...AND PERSISTS DUE TO THE LARGE DOWNSTREAM
BLOCKING RIDGE ACROSS THE GULF OF MEXICO AND FAR E PACIFIC E OF
105W. A MIDDLE TO UPPER LAYER TROUGH DOMINATES MOST OF THE AREA
N OF 10N AND W OF 105W...AND EXTENDS N ACROSS THE NE PACIFIC AND
WESTERN U.S. NUMEROUS SHORT WAVE CAN BE SEEN IN WATER VAPOR
IMAGERY MOVING THROUGH THIS MEAN CIRCULATION...AND ARE GRADUALLY
ERODING THE WESTERN PERIPHERY OF THE BLOCKING RIDGE. A 70-90 KT
UPPER JET IS MOVING THROUGH THE BASE OF THE TROUGH ALONG 14-16N
AND ACCELERATES TO 85-100 PLUS KT AS SW WINDS LIFT OUT OF THE
TROUGH AND OVER THE GULF OF MEXICO RIDGE. ABUNDANT MIDDLE TO
UPPER LEVEL MOISTURE EMBEDDED IN THIS FLOW IS STREAMING N-NE
AHEAD OF TROUGH ACROSS WESTERN MEXICO...TEXAS AND THE GULF COAST
STATES.

A 1029 MB HIGH IS CENTERED NEAR 34N143W AND ANCHORS A BROAD
RIDGE ACROSS THE NORTH AND WESTERN WATERS...EXTENDING FROM THE
HIGH TO NEAR 16N108W. OVERNIGHT SCATTEROMETER DATA SHOWED AN
AREA OF FRESH TO STRONG TRADE WINDS IN A TRIANGULAR AREA ROUGHLY
DEFINED FROM 23N140W TO 20N132W TO 10N124W TO 04N140W WHERE NE
TO E WINDS WERE 20-25 KT AND SEAS RUNNING 9 TO 12 FT. THE HIGH
WILL SHIFT SLOWLY SE AND WEAKEN SLIGHTLY OVER THE WEEKEND WHICH
WILL GRADUALLY REDUCE THE AREA OF STRONG TRADES TO BETWEEN 10N
AND 16N AND W OF 124W BY SUN.

STRONG NWLY WINDS ACROSS THE CALIFORNIA COASTAL WATERS ARE
GENERATING NORTHERLY SWELL THAT IS MOVING S AND ACROSS NE
PORTIONS OF THE AREA...WITH SEAS PRESENTLY 8 TO 11 FT NW OF A
LINE FROM 30N117W TO 26N117W TO 20N124W TO 23N140W. THIS SWELL
WILL GRADUALLY FADE THROUGH SAT BEFORE A NEW PULSE OF NORTHERLY
SWELL INVADES THESE NE WATERS SAT NIGHT THROUGH SUN AND BUILDS
SEAS 8 TO 10 FT N OF 25N.

MODEL GUIDANCE INDICATES W TO SW WINDS 20-25 KT ACROSS THE
EXTREME NORTHERN GULF OF CALIFORNIA THIS MORNING OCCURRING E OF
A SURFACE TROUGH EXTENDING FROM SOUTHERN CALIFORNIA INTO THE N
HALF OF THE GULF. THIS TROUGH IS EXPECTED TO LINGER IN THIS
GENERAL VICINITY OVER THE WEEKEND...BUT THE PRESSURE GRADIENT ON
THE EAST SIDE WILL WEAKEN...WITH WINDS EXPECTED TO REMAIN AROUND
15-20 KT.

SOUTHEAST OF THE SURFACE RIDGE...LIGHT TO MODERATE VARIABLE
WINDS PREVAIL ACROSS THE EASTERN WATERS. WEAK SOUTHWESTERLY
WINDS WERE OBSERVED BY OVERNIGHT SCATTEROMETER PASSES E OF
96W...AND SUGGEST THAT THE EASTERN PACIFIC MONSOONAL CIRCULATION
IS GRADUALLY EVOLVING. A WEAK EASTERLY WAVE HAS EMERGED OFF OF
COLOMBIA AND SOUTH AMERICA AND IS MOVING WESTWARD ACROSS THE FAR
EASTERN PACIFIC...AND HAS HELPED TO TRIGGER SEVERAL CLUSTERS OF
DEEP CONVECTION DESCRIBED ABOVE E OF 98W. THIS ACTIVE WEATHER IS
EXPECTED TO SHIFT WESTWARD DURING THE NEXT 24 HOURS.

$$
STRIPLING



000
AXPZ20 KNHC 241527
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 06N96W TO 06N112W TO 07N119W THROUGH LOW
PRES 1010 MB NEAR 07N121W TO 04N125W TO 04N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF LOW.

...DISCUSSION...

A RIDGE-TROUGH-RIDGE UPPER LEVEL PATTERN CONTINUES ACROSS THE
AREA THIS MORNING...AND PERSISTS DUE TO THE LARGE DOWNSTREAM
BLOCKING RIDGE ACROSS THE GULF OF MEXICO AND FAR E PACIFIC E OF
105W. A MIDDLE TO UPPER LAYER TROUGH DOMINATES MOST OF THE AREA
N OF 10N AND W OF 105W...AND EXTENDS N ACROSS THE NE PACIFIC AND
WESTERN U.S. NUMEROUS SHORT WAVE CAN BE SEEN IN WATER VAPOR
IMAGERY MOVING THROUGH THIS MEAN CIRCULATION...AND ARE GRADUALLY
ERODING THE WESTERN PERIPHERY OF THE BLOCKING RIDGE. A 70-90 KT
UPPER JET IS MOVING THROUGH THE BASE OF THE TROUGH ALONG 14-16N
AND ACCELERATES TO 85-100 PLUS KT AS SW WINDS LIFT OUT OF THE
TROUGH AND OVER THE GULF OF MEXICO RIDGE. ABUNDANT MIDDLE TO
UPPER LEVEL MOISTURE EMBEDDED IN THIS FLOW IS STREAMING N-NE
AHEAD OF TROUGH ACROSS WESTERN MEXICO...TEXAS AND THE GULF COAST
STATES.

A 1029 MB HIGH IS CENTERED NEAR 34N143W AND ANCHORS A BROAD
RIDGE ACROSS THE NORTH AND WESTERN WATERS...EXTENDING FROM THE
HIGH TO NEAR 16N108W. OVERNIGHT SCATTEROMETER DATA SHOWED AN
AREA OF FRESH TO STRONG TRADE WINDS IN A TRIANGULAR AREA ROUGHLY
DEFINED FROM 23N140W TO 20N132W TO 10N124W TO 04N140W WHERE NE
TO E WINDS WERE 20-25 KT AND SEAS RUNNING 9 TO 12 FT. THE HIGH
WILL SHIFT SLOWLY SE AND WEAKEN SLIGHTLY OVER THE WEEKEND WHICH
WILL GRADUALLY REDUCE THE AREA OF STRONG TRADES TO BETWEEN 10N
AND 16N AND W OF 124W BY SUN.

STRONG NWLY WINDS ACROSS THE CALIFORNIA COASTAL WATERS ARE
GENERATING NORTHERLY SWELL THAT IS MOVING S AND ACROSS NE
PORTIONS OF THE AREA...WITH SEAS PRESENTLY 8 TO 11 FT NW OF A
LINE FROM 30N117W TO 26N117W TO 20N124W TO 23N140W. THIS SWELL
WILL GRADUALLY FADE THROUGH SAT BEFORE A NEW PULSE OF NORTHERLY
SWELL INVADES THESE NE WATERS SAT NIGHT THROUGH SUN AND BUILDS
SEAS 8 TO 10 FT N OF 25N.

MODEL GUIDANCE INDICATES W TO SW WINDS 20-25 KT ACROSS THE
EXTREME NORTHERN GULF OF CALIFORNIA THIS MORNING OCCURRING E OF
A SURFACE TROUGH EXTENDING FROM SOUTHERN CALIFORNIA INTO THE N
HALF OF THE GULF. THIS TROUGH IS EXPECTED TO LINGER IN THIS
GENERAL VICINITY OVER THE WEEKEND...BUT THE PRESSURE GRADIENT ON
THE EAST SIDE WILL WEAKEN...WITH WINDS EXPECTED TO REMAIN AROUND
15-20 KT.

SOUTHEAST OF THE SURFACE RIDGE...LIGHT TO MODERATE VARIABLE
WINDS PREVAIL ACROSS THE EASTERN WATERS. WEAK SOUTHWESTERLY
WINDS WERE OBSERVED BY OVERNIGHT SCATTEROMETER PASSES E OF
96W...AND SUGGEST THAT THE EASTERN PACIFIC MONSOONAL CIRCULATION
IS GRADUALLY EVOLVING. A WEAK EASTERLY WAVE HAS EMERGED OFF OF
COLOMBIA AND SOUTH AMERICA AND IS MOVING WESTWARD ACROSS THE FAR
EASTERN PACIFIC...AND HAS HELPED TO TRIGGER SEVERAL CLUSTERS OF
DEEP CONVECTION DESCRIBED ABOVE E OF 98W. THIS ACTIVE WEATHER IS
EXPECTED TO SHIFT WESTWARD DURING THE NEXT 24 HOURS.

$$
STRIPLING



000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW


000
AXNT20 KNHC 241035
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1015 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 11N15W ALONG 8N15W TO 5N17W WHERE THE ITCZ BEGINS AND
CONTINUES ALONG 2N24W THEN S OF THE EQUATOR NEAR 31W. SCATTERED
MODERATE/STRONG CONVECTION IS FROM 2N TO THE INLAND OVER SW
AFRICA BETWEEN 5W-9W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS FROM 1N TO S OF THE EQUATOR BETWEEN 1W-4W.
CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE
FROM 1N-5N BETWEEN 9W-21W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA
COVERING THE GULF OF MEXICO AND THE SE CONUS THEN N-NW TO OVER
THE NORTHERN PLAIN STATES. THIS IS DRAWING TROPICAL MOISTURE
ACROSS THE NW GULF. AN UPPER TROUGH OVER NEW ENGLAND AND THE NW
ATLC IS SUPPORTING A COLD FRONT THAT EXTENDS FROM THE FAR W ATLC
ACROSS N FLORIDA NEAR TALLAHASSEE AND INTO THE N GULF OF MEXICO
ALONG 30N THEN INLAND AGAIN OVER SE LOUISIANA. HEAVY SHOWERS/
SCATTERED THUNDERSTORMS ARE INLAND OVER TEXAS AND ARE SPREADING
SCATTERED TO NUMEROUS SHOWERS WITH FOG INTO THE GULF WATERS N OF
25N W OF 94W. A WEAK 1015 MB HIGH IS OVER THE NE GULF NEAR
27N85W. THIS IS LEAVING THE REMAINDER OF THE GULF WITH FAIR
WEATHER THIS MORNING. THE ABOVE COLD FRONT WILL OVER THE NE GULF
TODAY. A WEAK ATLC RIDGE WILL EXTEND W OVER THE GULF TONIGHT
THROUGH SUN NIGHT.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 70W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN THIS MORNING.
ISOLATED SHOWERS REMAIN OVER PORTIONS OF HISPANIOLA AND ARE NO
OVER THE LESSER ANTILLES BETWEEN DOMINICA TO SAINT LUCIA LEAVING
THE REMAINDER OF THE CARIBBEAN WITH FAIR WEATHER THIS MORNING.
FRESH TO LOCALLY STRONG TRADE WINDS WILL DEVELOP EACH NIGHT
OFFSHORE OF THE GULF OF HONDURAS THROUGH SUN. FRESH TO STRONG
TRADE WINDS ALONG THE COAST OF COLOMBIA WILL DIMINISH SAT
MORNING.

HISPANIOLA...
ISOLATED SHOWERS REMAIN OVER THE EXTREME SW DOMINICAN REPUBLIC
AND S HAITI S OF 19N W OF 71W. AFTERNOON SHOWERS/THUNDERSTORMS
ARE POSSIBLE THIS AFTERNOON/EVENING WITH LOW LEVEL MOISTURE
INCREASING SAT AND SAT NIGHT AS A FRONT APPROACHES FROM THE N.
THIS WILL INCREASE SHOWERS SAT NIGHT INTO SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W INTO THE CENTRAL ATLC N OF 24N SUPPORTING A
COLD FRONT THAT EXTENDS FROM A 1009 MB LOW NEAR CAPE LOOKOUT
NORTH CAROLINA ALONG THE COAST OF SOUTH CAROLINA THEN INLAND
OVER SE GEORGIA AND INTO THE GULF OF MEXICO. A SECOND FRONT IS N
OF THE DISCUSSION AREA WITH SCATTERED SHOWERS/ISOLATED
THUNDERSTORMS N OF 31N BETWEEN 66W-76W AND N OF THE BAHAMAS FROM
27N-30N BETWEEN 76W-80W. A REMNANT COLD FRONT IS IN THE
E/CENTRAL ATLC EXTENDING ALONG 32N39W 31N43W TO 30N46W WHERE IT
BECOMES STATIONARY ALONG 30N52W 27N59W TO 25N68W THEN DISSIPATES
ALONG 25N72W TO 25N75W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC E OF THE CANARY ISLANDS THEN SW ALONG 21N27W TO 18N40W.
THIS IS SUPPORTING A SURFACE TROUGH THAT ENTERS NEAR 32N17W
ALONG 28N22W TO 25N31W. THIS SURFACE TROUGH SPLITS THE BROAD
SURFACE RIDGE THAT DOMINATES THE REMAINDER OF THE ATLC E OF THE
CENTRAL ATLC FRONT WITH A PAIR OF 1021 MB HIGHS NEAR 23N29W AND
27N34W. W ATLC COLD FRONT WILL REACH FROM BERMUDA TO CAPE
CANAVERAL EARLY SAT AND REMAIN N OF 23N REACHES FROM THE CENTRAL
ATLC TO N OF THE GREATER ANTILLES BY SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXPZ20 KNHC 240915
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ AXIS EXTENDS FROM 06N96W TO 06N112W TO 07N119W THROUGH LOW
PRES 1010 MB NEAR 07N121W TO 04N125W TO 04N140W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION WITHIN 75 NM OF LOW.

...DISCUSSION...

A MID LEVEL SHORT WAVE TROUGH EXTENDS FROM SOUTHERN CALIFORNIA
TO 25N127W. A BROAD LONG WAVE TROUGH IS LOCATED ALONG 120W. A
LARGE UPPER LEVEL ANTICYCLONE IS CENTERED OVER THE YUCATAN
PENINSULA NEAR 19N88W. DEEP TROPICAL MOISTURE IS STREAMING N-NE
AHEAD OF THE LONG WAVE TROUGH ACROSS WESTERN MEXICO INTO TEXAS.

1030 MB HIGH PRES CENTERED NEAR 33N144W ANCHORS A BROAD RIDGE
ACROSS NORTHERN WATERS W OF BAJA CALIFORNIA. SCATTEROMETER DATA
SHOWS AN AREA OF FRESH TO STRONG TRADE WINDS IN A TRIANGULAR
REGION ROUGHLY DEFINED FROM 26N138W TO 13N115W TO 07N135W. THE
NE WINDS ARE GENERATING WIND WAVES WHICH ARE PRIMARY COMPONENT
OF 8-11 FT SEAS INDICATED FROM ALTIMETER DATA. EXPECT SIMILAR
CONDITIONS TO PERSIST ACROSS W CENTRAL WATERS THROUGH SUN WITH
FRESH NE TRADES AND 8-10 FT SEAS.

VERY STRONG N WINDS ALONG THE CALIFORNIA COAST ARE GENERATING
NORTHERLY SWELL THAT WILL SWEEP S OF 30N LATE SAT NIGHT.

MODEL GUIDANCE INDICATES EXTREME NORTHERN GULF OF CALIFORNIA CAN
EXPECT 20-30 KT W-SW WINDS THIS MORNING FROM DIURNAL EFFECTS
ASSOCIATED WITH A THERMAL TROUGH IN THE SONORAN DESERT. AN ASCAT
PASS AT 0415 UTC SHOWED A RIBBON OF HIGHER WINDS BETWEEN 30-31N.

$$
MUNDELL


000
AXNT20 KNHC 240526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 7N12W TO 4N17W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N22W THEN S OF THE EQUATOR NEAR 27W. SCATTERED STRONG
CONVECTION IS N OF 2N TO INLAND OVER SW AFRICA BETWEEN 2W-6W.
SCATTERED MODERATE/STRONG CONVECTION IS FROM 2N TO S OF THE
EQUATOR BETWEEN THE PRIME MERIDIAN AND 2W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-6N BETWEEN 6W-
19W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA AND
COVERS THE GULF OF MEXICO AND THE SE CONUS. THIS IS DRAWING
TROPICAL MOISTURE ACROSS THE N GULF. AN UPPER TROUGH OVER NEW
ENGLAND AND THE NW ATLC IS SUPPORTING A COLD FRONT THAT IS
CURRENTLY INLAND ALONG THE N GULF COAST WITH A SEABREEZE SURFACE
TROUGH ALONG THE FLORIDA PENINSULA. HEAVY SHOWERS/SCATTERED
THUNDERSTORMS HAVE DEVELOPED INLAND OVER MEXICO AND ARE
SPREADING SCATTERED TO NUMEROUS SHOWERS OVER S TEXAS AND INTO
THE GULF WATERS FROM 22N-28N W OF 95W. A WEAK 1014 MB HIGH IS
OVER THE E GULF 27N85W. THIS IS LEAVING THE REMAINDER OF THE
GULF WITH FAIR WEATHER TONIGHT. THE ABOVE COLD FRONT WILL ENTER
THE GULF OVERNIGHT AND STALL OVER THE N/CENTRAL GULF SAT NIGHT
AND DISSIPATE ON SUN.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 80W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN. AFTERNOON
SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED SHOWERS
REMAINING OVER HISPANIOLA AND CUBA LEAVING THE REMAINDER OF THE
CARIBBEAN UNDER CLEAR SKIES TONIGHT. FRESH TO LOCALLY STRONG
TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF OF.
HONDURAS AS WELL AS ALONG THE COAST OF COLOMBIA THROUGH SUN.

HISPANIOLA...
AFTERNOON SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED
SHOWERS REMAIN OVER SW DOMINICAN REPUBLIC AND MOST OF HAITI
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS ARE POSSIBLE FRI WITH
LOW LEVEL MOISTURE INCREASING SAT AND SAT NIGHT AS A FRONT
APPROACHES FROM THE N. THIS WILL INCREASE SHOWERS SAT NIGHT INTO
SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W ATLC N OF 29N SUPPORTING A COLD FRONT THAT IS
N OF THE DISCUSSION AREA OF THE W ATLC AND IS ALONG THE N GULF
COAST IN THE GULF OF MEXICO. A REMNANT COLD FRONT IS IN THE
CENTRAL ATLC EXTENDING ALONG 32N41W 31N44W TO 30N50W WHERE IT
BECOMES STATIONARY ALONG 30N54W 27N62W 25N68W THEN DISSIPATES
ALONG 25N73W TO GRAND BAHAMA ISLAND. A WEAK 1015 MB HIGH IS W OF
THE FRONT NEAR 20N66W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC OVER THE CANARY ISLANDS THEN W-SW ALONG 20N36W TO 16N50W.
THIS IS SUPPORTING A DISSIPATING COLD FRONT N OF THE AREA AND A
SURFACE TROUGH THAT ENTERS NEAR 32N19W ALONG 26N28W TO 22N39W.
THIS SURFACE TROUGH SPLITS THE BROAD SURFACE RIDGE THAT
DOMINATES THE REMAINDER OF THE ATLC E OF THE CENTRAL ATLC FRONT
WITH A PAIR OF 1022 MB HIGHS NEAR 24N31W AND 25N36W. CENTRAL
ATLC FRONT WILL DISSIPATE BY FRI EVENING. COLD FRONT WILL MOVE
OFF THE NE FLORIDA COAST FRI MORNING AND QUICKLY REACH FROM NEAR
BERMUDA TO THE CENTRAL BAHAMAS FRI NIGHT AND BEGIN TO WEAKEN AS
IT REACHES FROM THE CENTRAL ATLC TO N OF THE GREATER ANTILLES
SAT AND SAT NIGHT. DEEPENING LOW MOVING E OFF THE CAROLINA COAST
LATE SAT NIGHT WILL PUSH ANOTHER COLD FRONT OFF THE NE FLORIDA
COAST SAT NIGHT AND EXTEND FROM NEAR BERMUDA TO THE NW BAHAMAS
ON SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 240526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 7N12W TO 4N17W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N22W THEN S OF THE EQUATOR NEAR 27W. SCATTERED STRONG
CONVECTION IS N OF 2N TO INLAND OVER SW AFRICA BETWEEN 2W-6W.
SCATTERED MODERATE/STRONG CONVECTION IS FROM 2N TO S OF THE
EQUATOR BETWEEN THE PRIME MERIDIAN AND 2W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-6N BETWEEN 6W-
19W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA AND
COVERS THE GULF OF MEXICO AND THE SE CONUS. THIS IS DRAWING
TROPICAL MOISTURE ACROSS THE N GULF. AN UPPER TROUGH OVER NEW
ENGLAND AND THE NW ATLC IS SUPPORTING A COLD FRONT THAT IS
CURRENTLY INLAND ALONG THE N GULF COAST WITH A SEABREEZE SURFACE
TROUGH ALONG THE FLORIDA PENINSULA. HEAVY SHOWERS/SCATTERED
THUNDERSTORMS HAVE DEVELOPED INLAND OVER MEXICO AND ARE
SPREADING SCATTERED TO NUMEROUS SHOWERS OVER S TEXAS AND INTO
THE GULF WATERS FROM 22N-28N W OF 95W. A WEAK 1014 MB HIGH IS
OVER THE E GULF 27N85W. THIS IS LEAVING THE REMAINDER OF THE
GULF WITH FAIR WEATHER TONIGHT. THE ABOVE COLD FRONT WILL ENTER
THE GULF OVERNIGHT AND STALL OVER THE N/CENTRAL GULF SAT NIGHT
AND DISSIPATE ON SUN.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 80W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN. AFTERNOON
SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED SHOWERS
REMAINING OVER HISPANIOLA AND CUBA LEAVING THE REMAINDER OF THE
CARIBBEAN UNDER CLEAR SKIES TONIGHT. FRESH TO LOCALLY STRONG
TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF OF.
HONDURAS AS WELL AS ALONG THE COAST OF COLOMBIA THROUGH SUN.

HISPANIOLA...
AFTERNOON SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED
SHOWERS REMAIN OVER SW DOMINICAN REPUBLIC AND MOST OF HAITI
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS ARE POSSIBLE FRI WITH
LOW LEVEL MOISTURE INCREASING SAT AND SAT NIGHT AS A FRONT
APPROACHES FROM THE N. THIS WILL INCREASE SHOWERS SAT NIGHT INTO
SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W ATLC N OF 29N SUPPORTING A COLD FRONT THAT IS
N OF THE DISCUSSION AREA OF THE W ATLC AND IS ALONG THE N GULF
COAST IN THE GULF OF MEXICO. A REMNANT COLD FRONT IS IN THE
CENTRAL ATLC EXTENDING ALONG 32N41W 31N44W TO 30N50W WHERE IT
BECOMES STATIONARY ALONG 30N54W 27N62W 25N68W THEN DISSIPATES
ALONG 25N73W TO GRAND BAHAMA ISLAND. A WEAK 1015 MB HIGH IS W OF
THE FRONT NEAR 20N66W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC OVER THE CANARY ISLANDS THEN W-SW ALONG 20N36W TO 16N50W.
THIS IS SUPPORTING A DISSIPATING COLD FRONT N OF THE AREA AND A
SURFACE TROUGH THAT ENTERS NEAR 32N19W ALONG 26N28W TO 22N39W.
THIS SURFACE TROUGH SPLITS THE BROAD SURFACE RIDGE THAT
DOMINATES THE REMAINDER OF THE ATLC E OF THE CENTRAL ATLC FRONT
WITH A PAIR OF 1022 MB HIGHS NEAR 24N31W AND 25N36W. CENTRAL
ATLC FRONT WILL DISSIPATE BY FRI EVENING. COLD FRONT WILL MOVE
OFF THE NE FLORIDA COAST FRI MORNING AND QUICKLY REACH FROM NEAR
BERMUDA TO THE CENTRAL BAHAMAS FRI NIGHT AND BEGIN TO WEAKEN AS
IT REACHES FROM THE CENTRAL ATLC TO N OF THE GREATER ANTILLES
SAT AND SAT NIGHT. DEEPENING LOW MOVING E OFF THE CAROLINA COAST
LATE SAT NIGHT WILL PUSH ANOTHER COLD FRONT OFF THE NE FLORIDA
COAST SAT NIGHT AND EXTEND FROM NEAR BERMUDA TO THE NW BAHAMAS
ON SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 240526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 7N12W TO 4N17W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N22W THEN S OF THE EQUATOR NEAR 27W. SCATTERED STRONG
CONVECTION IS N OF 2N TO INLAND OVER SW AFRICA BETWEEN 2W-6W.
SCATTERED MODERATE/STRONG CONVECTION IS FROM 2N TO S OF THE
EQUATOR BETWEEN THE PRIME MERIDIAN AND 2W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-6N BETWEEN 6W-
19W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA AND
COVERS THE GULF OF MEXICO AND THE SE CONUS. THIS IS DRAWING
TROPICAL MOISTURE ACROSS THE N GULF. AN UPPER TROUGH OVER NEW
ENGLAND AND THE NW ATLC IS SUPPORTING A COLD FRONT THAT IS
CURRENTLY INLAND ALONG THE N GULF COAST WITH A SEABREEZE SURFACE
TROUGH ALONG THE FLORIDA PENINSULA. HEAVY SHOWERS/SCATTERED
THUNDERSTORMS HAVE DEVELOPED INLAND OVER MEXICO AND ARE
SPREADING SCATTERED TO NUMEROUS SHOWERS OVER S TEXAS AND INTO
THE GULF WATERS FROM 22N-28N W OF 95W. A WEAK 1014 MB HIGH IS
OVER THE E GULF 27N85W. THIS IS LEAVING THE REMAINDER OF THE
GULF WITH FAIR WEATHER TONIGHT. THE ABOVE COLD FRONT WILL ENTER
THE GULF OVERNIGHT AND STALL OVER THE N/CENTRAL GULF SAT NIGHT
AND DISSIPATE ON SUN.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 80W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN. AFTERNOON
SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED SHOWERS
REMAINING OVER HISPANIOLA AND CUBA LEAVING THE REMAINDER OF THE
CARIBBEAN UNDER CLEAR SKIES TONIGHT. FRESH TO LOCALLY STRONG
TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF OF.
HONDURAS AS WELL AS ALONG THE COAST OF COLOMBIA THROUGH SUN.

HISPANIOLA...
AFTERNOON SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED
SHOWERS REMAIN OVER SW DOMINICAN REPUBLIC AND MOST OF HAITI
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS ARE POSSIBLE FRI WITH
LOW LEVEL MOISTURE INCREASING SAT AND SAT NIGHT AS A FRONT
APPROACHES FROM THE N. THIS WILL INCREASE SHOWERS SAT NIGHT INTO
SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W ATLC N OF 29N SUPPORTING A COLD FRONT THAT IS
N OF THE DISCUSSION AREA OF THE W ATLC AND IS ALONG THE N GULF
COAST IN THE GULF OF MEXICO. A REMNANT COLD FRONT IS IN THE
CENTRAL ATLC EXTENDING ALONG 32N41W 31N44W TO 30N50W WHERE IT
BECOMES STATIONARY ALONG 30N54W 27N62W 25N68W THEN DISSIPATES
ALONG 25N73W TO GRAND BAHAMA ISLAND. A WEAK 1015 MB HIGH IS W OF
THE FRONT NEAR 20N66W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC OVER THE CANARY ISLANDS THEN W-SW ALONG 20N36W TO 16N50W.
THIS IS SUPPORTING A DISSIPATING COLD FRONT N OF THE AREA AND A
SURFACE TROUGH THAT ENTERS NEAR 32N19W ALONG 26N28W TO 22N39W.
THIS SURFACE TROUGH SPLITS THE BROAD SURFACE RIDGE THAT
DOMINATES THE REMAINDER OF THE ATLC E OF THE CENTRAL ATLC FRONT
WITH A PAIR OF 1022 MB HIGHS NEAR 24N31W AND 25N36W. CENTRAL
ATLC FRONT WILL DISSIPATE BY FRI EVENING. COLD FRONT WILL MOVE
OFF THE NE FLORIDA COAST FRI MORNING AND QUICKLY REACH FROM NEAR
BERMUDA TO THE CENTRAL BAHAMAS FRI NIGHT AND BEGIN TO WEAKEN AS
IT REACHES FROM THE CENTRAL ATLC TO N OF THE GREATER ANTILLES
SAT AND SAT NIGHT. DEEPENING LOW MOVING E OFF THE CAROLINA COAST
LATE SAT NIGHT WILL PUSH ANOTHER COLD FRONT OFF THE NE FLORIDA
COAST SAT NIGHT AND EXTEND FROM NEAR BERMUDA TO THE NW BAHAMAS
ON SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXNT20 KNHC 240526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0515 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 7N12W TO 4N17W WHERE THE ITCZ BEGINS AND CONTINUES ALONG
2N22W THEN S OF THE EQUATOR NEAR 27W. SCATTERED STRONG
CONVECTION IS N OF 2N TO INLAND OVER SW AFRICA BETWEEN 2W-6W.
SCATTERED MODERATE/STRONG CONVECTION IS FROM 2N TO S OF THE
EQUATOR BETWEEN THE PRIME MERIDIAN AND 2W. CLUSTERS OF SCATTERED
MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 2N-6N BETWEEN 6W-
19W.

...DISCUSSION...

GULF OF MEXICO...
A BROAD UPPER RIDGE IS ANCHORED OVER THE YUCATAN PENINSULA AND
COVERS THE GULF OF MEXICO AND THE SE CONUS. THIS IS DRAWING
TROPICAL MOISTURE ACROSS THE N GULF. AN UPPER TROUGH OVER NEW
ENGLAND AND THE NW ATLC IS SUPPORTING A COLD FRONT THAT IS
CURRENTLY INLAND ALONG THE N GULF COAST WITH A SEABREEZE SURFACE
TROUGH ALONG THE FLORIDA PENINSULA. HEAVY SHOWERS/SCATTERED
THUNDERSTORMS HAVE DEVELOPED INLAND OVER MEXICO AND ARE
SPREADING SCATTERED TO NUMEROUS SHOWERS OVER S TEXAS AND INTO
THE GULF WATERS FROM 22N-28N W OF 95W. A WEAK 1014 MB HIGH IS
OVER THE E GULF 27N85W. THIS IS LEAVING THE REMAINDER OF THE
GULF WITH FAIR WEATHER TONIGHT. THE ABOVE COLD FRONT WILL ENTER
THE GULF OVERNIGHT AND STALL OVER THE N/CENTRAL GULF SAT NIGHT
AND DISSIPATE ON SUN.

CARIBBEAN SEA...
THE BROAD UPPER RIDGE OVER THE GULF OF MEXICO EXTENDS OVER THE
CARIBBEAN W OF 80W WITH NW FLOW ALOFT COVERING THE REMAINDER OF
THE CARIBBEAN. SATELLITE WATER VAPOR IMAGERY SHOWS STRONG
SUBSIDENCE AND DRY STABLE AIR ACROSS THE BASIN. AFTERNOON
SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED SHOWERS
REMAINING OVER HISPANIOLA AND CUBA LEAVING THE REMAINDER OF THE
CARIBBEAN UNDER CLEAR SKIES TONIGHT. FRESH TO LOCALLY STRONG
TRADE WINDS WILL DEVELOP EACH NIGHT OFFSHORE OF THE GULF OF.
HONDURAS AS WELL AS ALONG THE COAST OF COLOMBIA THROUGH SUN.

HISPANIOLA...
AFTERNOON SHOWERS/THUNDERSTORMS ARE WINDING DOWN WITH ISOLATED
SHOWERS REMAIN OVER SW DOMINICAN REPUBLIC AND MOST OF HAITI
TONIGHT. AFTERNOON SHOWERS/THUNDERSTORMS ARE POSSIBLE FRI WITH
LOW LEVEL MOISTURE INCREASING SAT AND SAT NIGHT AS A FRONT
APPROACHES FROM THE N. THIS WILL INCREASE SHOWERS SAT NIGHT INTO
SUN.

ATLANTIC OCEAN...
THE BROAD UPPER TROUGH OVER NEW ENGLAND AND INTO THE NW ATLC
DIPS S OVER THE W ATLC N OF 29N SUPPORTING A COLD FRONT THAT IS
N OF THE DISCUSSION AREA OF THE W ATLC AND IS ALONG THE N GULF
COAST IN THE GULF OF MEXICO. A REMNANT COLD FRONT IS IN THE
CENTRAL ATLC EXTENDING ALONG 32N41W 31N44W TO 30N50W WHERE IT
BECOMES STATIONARY ALONG 30N54W 27N62W 25N68W THEN DISSIPATES
ALONG 25N73W TO GRAND BAHAMA ISLAND. A WEAK 1015 MB HIGH IS W OF
THE FRONT NEAR 20N66W. A NARROW UPPER TROUGH EXTENDS INTO THE E
ATLC OVER THE CANARY ISLANDS THEN W-SW ALONG 20N36W TO 16N50W.
THIS IS SUPPORTING A DISSIPATING COLD FRONT N OF THE AREA AND A
SURFACE TROUGH THAT ENTERS NEAR 32N19W ALONG 26N28W TO 22N39W.
THIS SURFACE TROUGH SPLITS THE BROAD SURFACE RIDGE THAT
DOMINATES THE REMAINDER OF THE ATLC E OF THE CENTRAL ATLC FRONT
WITH A PAIR OF 1022 MB HIGHS NEAR 24N31W AND 25N36W. CENTRAL
ATLC FRONT WILL DISSIPATE BY FRI EVENING. COLD FRONT WILL MOVE
OFF THE NE FLORIDA COAST FRI MORNING AND QUICKLY REACH FROM NEAR
BERMUDA TO THE CENTRAL BAHAMAS FRI NIGHT AND BEGIN TO WEAKEN AS
IT REACHES FROM THE CENTRAL ATLC TO N OF THE GREATER ANTILLES
SAT AND SAT NIGHT. DEEPENING LOW MOVING E OFF THE CAROLINA COAST
LATE SAT NIGHT WILL PUSH ANOTHER COLD FRONT OFF THE NE FLORIDA
COAST SAT NIGHT AND EXTEND FROM NEAR BERMUDA TO THE NW BAHAMAS
ON SUN.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
PAW



000
AXPZ20 KNHC 240235
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI APR 24 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0230 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 06N95W TO 08N114W TO 07N119W THEN
RESUMES FROM 06N123W TO 04N140W. NO SIGNIFICANT CONVECTION IS
NOTED.

...DISCUSSION...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N116W TO
21N122W TO 13N127W. UPPER LEVEL SOUTHWEST WIND FLOW IS WITHIN
480 NM TO 600 NM TO THE EAST AND SOUTHEAST OF THE TROUGH WHICH
IS TRANSPORTING DEEP TROPICAL MOISTURE TO THE NORTHEAST. THE
SOUTHWEST WIND FLOW IS MOVING FROM 11N120W BEYOND 25N108W INTO
MEXICO. BROAD MIDDLE LEVEL TO UPPER LEVEL ANTICYCLONIC WIND FLOW
COVERS THE AREA TO THE EAST OF THE SOUTHWEST WIND FLOW...FROM
MEXICO AND CENTRAL AMERICA TO THE ITCZ.

A SURFACE RIDGE EXTENDS FROM A 1030 MB HIGH PRESSURE CENTER
THAT IS NEAR 35N145W THROUGH 32N137W TO 17N105W. THE PRESSURE
GRADIENT SW OF THE RIDGE AND N OF THE LOWER PRESSURES ASSOCIATED
WITH THE ITCZ IS TIGHT ENOUGH TO SUPPORT FRESH TO STRONG NE
TRADES ACROSS THE W CENTRAL WATERS. COMBINED SEAS ARE 8-11 FT IN
MIXED NE WIND WAVES AND LONG PERIOD SW AND NW SWELLS. THESE
CONDITIONS ARE FORECAST TO PERSIST ACROSS THE W CENTRAL WATERS
THROUGH THE NEXT 48 HOURS.

GALE FORCE NORTHERLY WINDS ARE BLOWING IN THE WATERS THAT ARE
OFF THE NORTHERN CALIFORNIA REDWOOD COAST. THESE WINDS ARE
GENERATING NORTHERLY SWELL WITH SEA HEIGHTS THAT RANGE FROM 8-11
FT THAT ARE PROPAGATING SOUTHWARD INTO THE NORTH CENTRAL PART OF
THE DISCUSSION AREA. THESE SEAS WILL PERSIST THROUGH EARLY FRI
GRADUALLY SUBSIDING TO LESS THAN 8 FT BY SAT AFTERNOON AS THE
GALE FORCE WIND EVENT THAT IS TAKING PLACE ENDS.

GULF OF CALIFORNIA...A SURFACE TROUGH EXTENDS FROM SOUTHWEST
ARIZONA INTO THE FAR NORTHWEST SECTION OF THE GULF OF
CALIFORNIA. THE SURFACE PRESSURE GRADIENT THAT SURROUNDS THIS
TROUGH WILL STRENGTHEN THIS EVENING GIVING SOUTH-TO-SOUTHWEST
WIND SPEEDS OF 20-25 KT ON THE EASTERN SIDE OF THE TROUGH.
PULSES OF THESE STRONGER WIND SPEEDS WILL PULSE FROM THE
MIDNIGHT/EARLY MORNING HOURS UNTIL THE MIDDAY HOURS FOR TONIGHT
AND AGAIN FRI NIGHT. THE SEA HEIGHTS WILL BE LOWER THAN 8 FEET
DURING THE NEXT 48 HOURS.

GULF OF PAPAGAYO...GAP WIND FLOW WILL PULSE TO FRESH TO STRONG
LEVELS LATE TONIGHT INTO EARLY FRI WITH THE ASSISTANCE OF
NOCTURNAL DRAINAGE FLOW.

$$
LEWITSKY



000
AXNT20 KNHC 240004
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL
ATLANTIC NEAR 07N12W TO 04N17W WHERE THE ITCZ BEGINS AND
CONTINUES TO 01S28W JUST E OF A SURFACE TROUGH ALONG 30W. THE
ITCZ RESUMES W OF THE SURFACE TROUGH NEAR 02S32W AND CONTINUES
TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. SCATTERED TO
ISOLATED MODERATE CONVECTION IS FROM 07S TO 02N W OF 24W.
SIMILAR CONVECTION IS FROM THE EQUATOR TO 05N W OF 45W.

...DISCUSSION...

GULF OF MEXICO...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC TRANSITIONING
TO A STATIONARY FRONT THAT STARTS TO DISSIPATE N OF THE SOUTHERN
BAHAMAS. THE DISSIPATING STATIONARY FRONT THEN EXTENDS NW ACROSS
THE NORTHERN BAHAMAS TO SOUTH OF LAKE OKEECHOBEE THE ACROSS THE
NE GULF OF MEXICO ALONG 26N82W TO 29N86W TO SE LOUISIANA NEAR
29N91W. A MIDDLE TO UPPER LEVEL TROUGH WITH BASE OVER THE SW N
ATLC ALONG WITH A RIDGE ANCHORED OVER THE SOUTHERN GULF IS
GENERATING A SLIGHT DIFFLUENT ENVIRONMENT OVER THE NE GULF. WIND
FLOW AROUND THE RIDGE ALSO ADVECTS MOISTURE FROM THE EPAC WATERS
TO THE NORTHERN GULF WHERE SSMI TPW IMAGERY CONTINUE TO SHOW
ABUNDANT MOISTURE. DEEP LAYER MOISTURE ENHANCES SCATTERED
SHOWERS AND TSTMS WITHIN 100 NM S OF THE FRONT AND ISOLATED
SHOWERS AND TSTMS N OF THE BOUNDARY...INCLUDING THE FLORIDA
PENINSULA. FOG IS POSSIBLE FOR THE NW GULF N OF 27N AND ALONG
COASTAL WATERS OF THE YUCATAN PENINSULA AS INDICATED BY GOES-13
MEDIUM TO HIGH IFR FOG PROBABILITIES. FAIR WEATHER IS ELSEWHERE.
LIGHT VARIABLE WINDS UP TO 10 KT ARE ACROSS THE BASIN. THE
DISSIPATING FRONT IS FORECAST TO WEAKEN INTO A SURFACE TROUGH
LATE TONIGHT THAT IS EXPECTED TO DISSIPATE FRIDAY MORNING. LOW
PRESSURE WILL DOMINATE ACROSS THE BASIN FOR THE NEXT THREE DAYS.

CARIBBEAN SEA...

NORTHERLY FLOW ASSOCIATED WITH A WEAK CENTER OF HIGH PRESSURE
OVER THE SW N ATLC WATERS AND E-SE TRADES OVER THE NORTHERN
CARIBBEAN WATERS IS GENERATING AN ELONGATED AREA OF LOW PRESSURE
OVER CUBA...WHICH ALONG MIDDLE TO LOW LEVEL MOISTURE BEING
ADVECTED FROM THE NORTHERN GULF OF MEXICO SUPPORT SCATTERED
SHOWERS AND TSTMS OVER CENTRAL CUBA...EXTENDING TO ADJACENT
WATERS. MIDDLE TO LOW LEVEL MOISTURE ASSOCIATED WITH THE FRONTAL
BOUNDARY ACROSS THE SW N ATLC IS BEING ADVECTED TO
HISPANIOLA...WHICH ALONG A DIFFLUENT ENVIRONMENT ALOFT SUPPORT
CLOUDINESS ACROSS THE ISLAND. HOWEVER...SHOWERS ARE NOT EXPECTED
AS DEEP LAYER DRY AIR DOMINATES ACROSS THE ISLAND. ISOLATED
SHOWERS ARE POSSIBLE ACROSS THE WINDWARD PASSAGE. FAIR WEATHER
PREVAILS ELSEWHERE. TRADES OF 15 KT DOMINATES ACROSS THE
CARIBBEAN...INCREASING TO 20 TO 25 KT ALONG THE COAST OF
COLOMBIA. NO SIGNIFICANT CHANGES ARE EXPECTED DURING THE NEXT
TWO DAYS.

HISPANIOLA...

A MIDDLE TO UPPER LEVEL DIFFLUENT ENVIRONMENT IS OVER THE
ISLAND...HOWEVER CURRENTLY DEEP LAYER DRY AIR IS PREVENTING THE
DEVELOPMENT OF CONVECTION. DRY AIR IS FORECAST TO PREVAIL ACROSS
THE ISLAND THROUGH THU NIGHT. MOISTURE AHEAD OF A FRONT TO MOVE
N OF THE ISLAND WILL ENHANCE SHOWERS OVER HISPANIOLA FRIDAY
MORNING.

ATLANTIC OCEAN...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC ALONG 30N47W
SW TO 27N57W WHERE IT TRANSITIONS TO A STATIONARY FRONT SW TO
25N68W THEN STARTS TO WEAKEN TO THE NORTHERN BAHAMAS NEAR 26N78W
INTO SOUTHERN FLORIDA NW ACROSS THE NE GULF TO SOUTHERN
LOUISIANA. SCATTERED MODERATE CONVECTION IS N OF 25N BETWEEN 45W
AND 64W. SIMILAR CONVECTION ALONG WITH TSTMS ARE S OF THE
BOUNDARY TO ANDROS ISLAND W OF 76W. SURFACE RIDGING AND FAIR
WEATHER PREVAILS ELSEWHERE. A NEW COLD FRONT ENTERS THE SW N
ATLC FRIDAY MORNING ENHANCING SCATTERED TO ISOLATED SHOWERS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR



000
AXNT20 KNHC 240004
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL
ATLANTIC NEAR 07N12W TO 04N17W WHERE THE ITCZ BEGINS AND
CONTINUES TO 01S28W JUST E OF A SURFACE TROUGH ALONG 30W. THE
ITCZ RESUMES W OF THE SURFACE TROUGH NEAR 02S32W AND CONTINUES
TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. SCATTERED TO
ISOLATED MODERATE CONVECTION IS FROM 07S TO 02N W OF 24W.
SIMILAR CONVECTION IS FROM THE EQUATOR TO 05N W OF 45W.

...DISCUSSION...

GULF OF MEXICO...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC TRANSITIONING
TO A STATIONARY FRONT THAT STARTS TO DISSIPATE N OF THE SOUTHERN
BAHAMAS. THE DISSIPATING STATIONARY FRONT THEN EXTENDS NW ACROSS
THE NORTHERN BAHAMAS TO SOUTH OF LAKE OKEECHOBEE THE ACROSS THE
NE GULF OF MEXICO ALONG 26N82W TO 29N86W TO SE LOUISIANA NEAR
29N91W. A MIDDLE TO UPPER LEVEL TROUGH WITH BASE OVER THE SW N
ATLC ALONG WITH A RIDGE ANCHORED OVER THE SOUTHERN GULF IS
GENERATING A SLIGHT DIFFLUENT ENVIRONMENT OVER THE NE GULF. WIND
FLOW AROUND THE RIDGE ALSO ADVECTS MOISTURE FROM THE EPAC WATERS
TO THE NORTHERN GULF WHERE SSMI TPW IMAGERY CONTINUE TO SHOW
ABUNDANT MOISTURE. DEEP LAYER MOISTURE ENHANCES SCATTERED
SHOWERS AND TSTMS WITHIN 100 NM S OF THE FRONT AND ISOLATED
SHOWERS AND TSTMS N OF THE BOUNDARY...INCLUDING THE FLORIDA
PENINSULA. FOG IS POSSIBLE FOR THE NW GULF N OF 27N AND ALONG
COASTAL WATERS OF THE YUCATAN PENINSULA AS INDICATED BY GOES-13
MEDIUM TO HIGH IFR FOG PROBABILITIES. FAIR WEATHER IS ELSEWHERE.
LIGHT VARIABLE WINDS UP TO 10 KT ARE ACROSS THE BASIN. THE
DISSIPATING FRONT IS FORECAST TO WEAKEN INTO A SURFACE TROUGH
LATE TONIGHT THAT IS EXPECTED TO DISSIPATE FRIDAY MORNING. LOW
PRESSURE WILL DOMINATE ACROSS THE BASIN FOR THE NEXT THREE DAYS.

CARIBBEAN SEA...

NORTHERLY FLOW ASSOCIATED WITH A WEAK CENTER OF HIGH PRESSURE
OVER THE SW N ATLC WATERS AND E-SE TRADES OVER THE NORTHERN
CARIBBEAN WATERS IS GENERATING AN ELONGATED AREA OF LOW PRESSURE
OVER CUBA...WHICH ALONG MIDDLE TO LOW LEVEL MOISTURE BEING
ADVECTED FROM THE NORTHERN GULF OF MEXICO SUPPORT SCATTERED
SHOWERS AND TSTMS OVER CENTRAL CUBA...EXTENDING TO ADJACENT
WATERS. MIDDLE TO LOW LEVEL MOISTURE ASSOCIATED WITH THE FRONTAL
BOUNDARY ACROSS THE SW N ATLC IS BEING ADVECTED TO
HISPANIOLA...WHICH ALONG A DIFFLUENT ENVIRONMENT ALOFT SUPPORT
CLOUDINESS ACROSS THE ISLAND. HOWEVER...SHOWERS ARE NOT EXPECTED
AS DEEP LAYER DRY AIR DOMINATES ACROSS THE ISLAND. ISOLATED
SHOWERS ARE POSSIBLE ACROSS THE WINDWARD PASSAGE. FAIR WEATHER
PREVAILS ELSEWHERE. TRADES OF 15 KT DOMINATES ACROSS THE
CARIBBEAN...INCREASING TO 20 TO 25 KT ALONG THE COAST OF
COLOMBIA. NO SIGNIFICANT CHANGES ARE EXPECTED DURING THE NEXT
TWO DAYS.

HISPANIOLA...

A MIDDLE TO UPPER LEVEL DIFFLUENT ENVIRONMENT IS OVER THE
ISLAND...HOWEVER CURRENTLY DEEP LAYER DRY AIR IS PREVENTING THE
DEVELOPMENT OF CONVECTION. DRY AIR IS FORECAST TO PREVAIL ACROSS
THE ISLAND THROUGH THU NIGHT. MOISTURE AHEAD OF A FRONT TO MOVE
N OF THE ISLAND WILL ENHANCE SHOWERS OVER HISPANIOLA FRIDAY
MORNING.

ATLANTIC OCEAN...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC ALONG 30N47W
SW TO 27N57W WHERE IT TRANSITIONS TO A STATIONARY FRONT SW TO
25N68W THEN STARTS TO WEAKEN TO THE NORTHERN BAHAMAS NEAR 26N78W
INTO SOUTHERN FLORIDA NW ACROSS THE NE GULF TO SOUTHERN
LOUISIANA. SCATTERED MODERATE CONVECTION IS N OF 25N BETWEEN 45W
AND 64W. SIMILAR CONVECTION ALONG WITH TSTMS ARE S OF THE
BOUNDARY TO ANDROS ISLAND W OF 76W. SURFACE RIDGING AND FAIR
WEATHER PREVAILS ELSEWHERE. A NEW COLD FRONT ENTERS THE SW N
ATLC FRIDAY MORNING ENHANCING SCATTERED TO ISOLATED SHOWERS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR


000
AXNT20 KNHC 240004
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL
ATLANTIC NEAR 07N12W TO 04N17W WHERE THE ITCZ BEGINS AND
CONTINUES TO 01S28W JUST E OF A SURFACE TROUGH ALONG 30W. THE
ITCZ RESUMES W OF THE SURFACE TROUGH NEAR 02S32W AND CONTINUES
TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. SCATTERED TO
ISOLATED MODERATE CONVECTION IS FROM 07S TO 02N W OF 24W.
SIMILAR CONVECTION IS FROM THE EQUATOR TO 05N W OF 45W.

...DISCUSSION...

GULF OF MEXICO...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC TRANSITIONING
TO A STATIONARY FRONT THAT STARTS TO DISSIPATE N OF THE SOUTHERN
BAHAMAS. THE DISSIPATING STATIONARY FRONT THEN EXTENDS NW ACROSS
THE NORTHERN BAHAMAS TO SOUTH OF LAKE OKEECHOBEE THE ACROSS THE
NE GULF OF MEXICO ALONG 26N82W TO 29N86W TO SE LOUISIANA NEAR
29N91W. A MIDDLE TO UPPER LEVEL TROUGH WITH BASE OVER THE SW N
ATLC ALONG WITH A RIDGE ANCHORED OVER THE SOUTHERN GULF IS
GENERATING A SLIGHT DIFFLUENT ENVIRONMENT OVER THE NE GULF. WIND
FLOW AROUND THE RIDGE ALSO ADVECTS MOISTURE FROM THE EPAC WATERS
TO THE NORTHERN GULF WHERE SSMI TPW IMAGERY CONTINUE TO SHOW
ABUNDANT MOISTURE. DEEP LAYER MOISTURE ENHANCES SCATTERED
SHOWERS AND TSTMS WITHIN 100 NM S OF THE FRONT AND ISOLATED
SHOWERS AND TSTMS N OF THE BOUNDARY...INCLUDING THE FLORIDA
PENINSULA. FOG IS POSSIBLE FOR THE NW GULF N OF 27N AND ALONG
COASTAL WATERS OF THE YUCATAN PENINSULA AS INDICATED BY GOES-13
MEDIUM TO HIGH IFR FOG PROBABILITIES. FAIR WEATHER IS ELSEWHERE.
LIGHT VARIABLE WINDS UP TO 10 KT ARE ACROSS THE BASIN. THE
DISSIPATING FRONT IS FORECAST TO WEAKEN INTO A SURFACE TROUGH
LATE TONIGHT THAT IS EXPECTED TO DISSIPATE FRIDAY MORNING. LOW
PRESSURE WILL DOMINATE ACROSS THE BASIN FOR THE NEXT THREE DAYS.

CARIBBEAN SEA...

NORTHERLY FLOW ASSOCIATED WITH A WEAK CENTER OF HIGH PRESSURE
OVER THE SW N ATLC WATERS AND E-SE TRADES OVER THE NORTHERN
CARIBBEAN WATERS IS GENERATING AN ELONGATED AREA OF LOW PRESSURE
OVER CUBA...WHICH ALONG MIDDLE TO LOW LEVEL MOISTURE BEING
ADVECTED FROM THE NORTHERN GULF OF MEXICO SUPPORT SCATTERED
SHOWERS AND TSTMS OVER CENTRAL CUBA...EXTENDING TO ADJACENT
WATERS. MIDDLE TO LOW LEVEL MOISTURE ASSOCIATED WITH THE FRONTAL
BOUNDARY ACROSS THE SW N ATLC IS BEING ADVECTED TO
HISPANIOLA...WHICH ALONG A DIFFLUENT ENVIRONMENT ALOFT SUPPORT
CLOUDINESS ACROSS THE ISLAND. HOWEVER...SHOWERS ARE NOT EXPECTED
AS DEEP LAYER DRY AIR DOMINATES ACROSS THE ISLAND. ISOLATED
SHOWERS ARE POSSIBLE ACROSS THE WINDWARD PASSAGE. FAIR WEATHER
PREVAILS ELSEWHERE. TRADES OF 15 KT DOMINATES ACROSS THE
CARIBBEAN...INCREASING TO 20 TO 25 KT ALONG THE COAST OF
COLOMBIA. NO SIGNIFICANT CHANGES ARE EXPECTED DURING THE NEXT
TWO DAYS.

HISPANIOLA...

A MIDDLE TO UPPER LEVEL DIFFLUENT ENVIRONMENT IS OVER THE
ISLAND...HOWEVER CURRENTLY DEEP LAYER DRY AIR IS PREVENTING THE
DEVELOPMENT OF CONVECTION. DRY AIR IS FORECAST TO PREVAIL ACROSS
THE ISLAND THROUGH THU NIGHT. MOISTURE AHEAD OF A FRONT TO MOVE
N OF THE ISLAND WILL ENHANCE SHOWERS OVER HISPANIOLA FRIDAY
MORNING.

ATLANTIC OCEAN...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC ALONG 30N47W
SW TO 27N57W WHERE IT TRANSITIONS TO A STATIONARY FRONT SW TO
25N68W THEN STARTS TO WEAKEN TO THE NORTHERN BAHAMAS NEAR 26N78W
INTO SOUTHERN FLORIDA NW ACROSS THE NE GULF TO SOUTHERN
LOUISIANA. SCATTERED MODERATE CONVECTION IS N OF 25N BETWEEN 45W
AND 64W. SIMILAR CONVECTION ALONG WITH TSTMS ARE S OF THE
BOUNDARY TO ANDROS ISLAND W OF 76W. SURFACE RIDGING AND FAIR
WEATHER PREVAILS ELSEWHERE. A NEW COLD FRONT ENTERS THE SW N
ATLC FRIDAY MORNING ENHANCING SCATTERED TO ISOLATED SHOWERS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR



000
AXNT20 KNHC 240004
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2345 UTC.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL
ATLANTIC NEAR 07N12W TO 04N17W WHERE THE ITCZ BEGINS AND
CONTINUES TO 01S28W JUST E OF A SURFACE TROUGH ALONG 30W. THE
ITCZ RESUMES W OF THE SURFACE TROUGH NEAR 02S32W AND CONTINUES
TO THE NORTHERN COAST OF BRAZIL NEAR 02S44W. SCATTERED TO
ISOLATED MODERATE CONVECTION IS FROM 07S TO 02N W OF 24W.
SIMILAR CONVECTION IS FROM THE EQUATOR TO 05N W OF 45W.

...DISCUSSION...

GULF OF MEXICO...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC TRANSITIONING
TO A STATIONARY FRONT THAT STARTS TO DISSIPATE N OF THE SOUTHERN
BAHAMAS. THE DISSIPATING STATIONARY FRONT THEN EXTENDS NW ACROSS
THE NORTHERN BAHAMAS TO SOUTH OF LAKE OKEECHOBEE THE ACROSS THE
NE GULF OF MEXICO ALONG 26N82W TO 29N86W TO SE LOUISIANA NEAR
29N91W. A MIDDLE TO UPPER LEVEL TROUGH WITH BASE OVER THE SW N
ATLC ALONG WITH A RIDGE ANCHORED OVER THE SOUTHERN GULF IS
GENERATING A SLIGHT DIFFLUENT ENVIRONMENT OVER THE NE GULF. WIND
FLOW AROUND THE RIDGE ALSO ADVECTS MOISTURE FROM THE EPAC WATERS
TO THE NORTHERN GULF WHERE SSMI TPW IMAGERY CONTINUE TO SHOW
ABUNDANT MOISTURE. DEEP LAYER MOISTURE ENHANCES SCATTERED
SHOWERS AND TSTMS WITHIN 100 NM S OF THE FRONT AND ISOLATED
SHOWERS AND TSTMS N OF THE BOUNDARY...INCLUDING THE FLORIDA
PENINSULA. FOG IS POSSIBLE FOR THE NW GULF N OF 27N AND ALONG
COASTAL WATERS OF THE YUCATAN PENINSULA AS INDICATED BY GOES-13
MEDIUM TO HIGH IFR FOG PROBABILITIES. FAIR WEATHER IS ELSEWHERE.
LIGHT VARIABLE WINDS UP TO 10 KT ARE ACROSS THE BASIN. THE
DISSIPATING FRONT IS FORECAST TO WEAKEN INTO A SURFACE TROUGH
LATE TONIGHT THAT IS EXPECTED TO DISSIPATE FRIDAY MORNING. LOW
PRESSURE WILL DOMINATE ACROSS THE BASIN FOR THE NEXT THREE DAYS.

CARIBBEAN SEA...

NORTHERLY FLOW ASSOCIATED WITH A WEAK CENTER OF HIGH PRESSURE
OVER THE SW N ATLC WATERS AND E-SE TRADES OVER THE NORTHERN
CARIBBEAN WATERS IS GENERATING AN ELONGATED AREA OF LOW PRESSURE
OVER CUBA...WHICH ALONG MIDDLE TO LOW LEVEL MOISTURE BEING
ADVECTED FROM THE NORTHERN GULF OF MEXICO SUPPORT SCATTERED
SHOWERS AND TSTMS OVER CENTRAL CUBA...EXTENDING TO ADJACENT
WATERS. MIDDLE TO LOW LEVEL MOISTURE ASSOCIATED WITH THE FRONTAL
BOUNDARY ACROSS THE SW N ATLC IS BEING ADVECTED TO
HISPANIOLA...WHICH ALONG A DIFFLUENT ENVIRONMENT ALOFT SUPPORT
CLOUDINESS ACROSS THE ISLAND. HOWEVER...SHOWERS ARE NOT EXPECTED
AS DEEP LAYER DRY AIR DOMINATES ACROSS THE ISLAND. ISOLATED
SHOWERS ARE POSSIBLE ACROSS THE WINDWARD PASSAGE. FAIR WEATHER
PREVAILS ELSEWHERE. TRADES OF 15 KT DOMINATES ACROSS THE
CARIBBEAN...INCREASING TO 20 TO 25 KT ALONG THE COAST OF
COLOMBIA. NO SIGNIFICANT CHANGES ARE EXPECTED DURING THE NEXT
TWO DAYS.

HISPANIOLA...

A MIDDLE TO UPPER LEVEL DIFFLUENT ENVIRONMENT IS OVER THE
ISLAND...HOWEVER CURRENTLY DEEP LAYER DRY AIR IS PREVENTING THE
DEVELOPMENT OF CONVECTION. DRY AIR IS FORECAST TO PREVAIL ACROSS
THE ISLAND THROUGH THU NIGHT. MOISTURE AHEAD OF A FRONT TO MOVE
N OF THE ISLAND WILL ENHANCE SHOWERS OVER HISPANIOLA FRIDAY
MORNING.

ATLANTIC OCEAN...

A SHORTWAVE UPPER TROUGH SUPPORTS A 1009 MB LOW NEAR 37N47W FROM
WHICH A COLD FRONT EXTENDS ACROSS THE CENTRAL ATLC ALONG 30N47W
SW TO 27N57W WHERE IT TRANSITIONS TO A STATIONARY FRONT SW TO
25N68W THEN STARTS TO WEAKEN TO THE NORTHERN BAHAMAS NEAR 26N78W
INTO SOUTHERN FLORIDA NW ACROSS THE NE GULF TO SOUTHERN
LOUISIANA. SCATTERED MODERATE CONVECTION IS N OF 25N BETWEEN 45W
AND 64W. SIMILAR CONVECTION ALONG WITH TSTMS ARE S OF THE
BOUNDARY TO ANDROS ISLAND W OF 76W. SURFACE RIDGING AND FAIR
WEATHER PREVAILS ELSEWHERE. A NEW COLD FRONT ENTERS THE SW N
ATLC FRIDAY MORNING ENHANCING SCATTERED TO ISOLATED SHOWERS.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
NR


000
AXPZ20 KNHC 232132
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 05N93W TO 08N114W TO 03N140W.
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS FROM 01N
TO 04N BETWEEN 88W AND 92W...AND ALSO WITHIN 120 NM S OF THE
AXIS BETWEEN 112W AND 118W.

ALSO...SCATTERED MODERATE CONVECTION IS FROM 03N TO 06N BETWEEN
80W AND 82W UNDER AN AREA OF UPPER LEVEL DIFFLUENCE.

...DISCUSSION...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N117W TO
25N122W TO 13N130W. UPPER LEVEL SOUTHWEST WIND FLOW IS WITHIN
420 NM TO 580 NM TO THE EAST AND SOUTHEAST OF THE TROUGH WHICH
IS TRANSPORTING DEEP TROPICAL MOISTURE TO THE NORTHEAST. THE
SOUTHWEST WIND FLOW IS MOVING FROM 11N125W BEYOND 25N108W INTO
MEXICO. BROAD MIDDLE LEVEL TO UPPER LEVEL ANTICYCLONIC WIND FLOW
COVERS THE AREA TO THE EAST OF THE SOUTHWEST WIND FLOW... FROM
MEXICO AND CENTRAL AMERICA TO THE ITCZ.

A SURFACE RIDGE EXTENDS FROM A 1032 MB HIGH PRESSURE CENTER THAT
IS NEAR 35N144W THROUGH 32N139W TO 18N106W. THE PRESSURE
GRADIENT SW OF THE RIDGE AND N OF THE LOWER PRESSURES ASSOCIATED
WITH THE ITCZ IS TIGHT ENOUGH TO SUPPORT FRESH TO STRONG NE
TRADES ACROSS THE W CENTRAL WATERS. COMBINED SEAS ARE 8-11 FT IN
MIXED NE WIND WAVES AND LONG PERIOD SW AND NW SWELLS. THESE
CONDITIONS ARE FORECAST TO PERSIST ACROSS THE W CENTRAL WATERS
THROUGH THE NEXT 48 HOURS.

GALE FORCE NORTHERLY WINDS ARE BLOWING IN THE WATERS THAT ARE
OFF THE NORTHERN CALIFORNIA REDWOOD COAST. THESE WINDS ARE
GENERATING NORTHERLY SWELL WITH SEA HEIGHTS THAT RANGE FROM 8-11
FT THAT ARE PROPAGATING SOUTHWARD INTO THE NORTH CENTRAL PART OF
THE DISCUSSION AREA. THESE SEAS WILL PERSIST THROUGH EARLY FRI
GRADUALLY SUBSIDING TO LESS THAN 8 FT BY SAT AFTERNOON AS THE
GALE FORCE WIND EVENT THAT IS TAKING PLACE ENDS.

THE GULF OF CALIFORNIA...A SURFACE TROUGH EXTENDS FROM SOUTHWEST
ARIZONA INTO THE FAR NORTHWEST SECTION OF THE GULF OF
CALIFORNIA. THE SURFACE PRESSURE GRADIENT THAT SURROUNDS THIS
TROUGH WILL STRENGTHEN THIS EVENING GIVING SOUTH-TO-SOUTHWEST
WIND SPEEDS OF 20-25 KT ON THE EASTERN SIDE OF THE TROUGH.
PULSES OF THESE STRONGER WIND SPEEDS WILL PULSE FROM THE
MIDNIGHT/EARLY MORNING HOURS UNTIL THE MIDDAY HOURS FOR TONIGHT
AND AGAIN FRI NIGHT. THE SEA HEIGHTS WILL BE LOWER THAN 8 FEET
DURING THE NEXT 48 HOURS.

GULF OF PAPAGAYO...GAP WIND FLOW WILL PULSE TO FRESH TO STRONG
LEVELS LATE TONIGHT INTO EARLY FRI WITH THE ASSISTANCE OF
NOCTURNAL DRAINAGE FLOW.

$$
LEWITSKY


000
AXPZ20 KNHC 232132
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 23 2015

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE ITCZ AXIS EXTENDS FROM 05N93W TO 08N114W TO 03N140W.
SCATTERED MODERATE AND ISOLATED STRONG CONVECTION IS FROM 01N
TO 04N BETWEEN 88W AND 92W...AND ALSO WITHIN 120 NM S OF THE
AXIS BETWEEN 112W AND 118W.

ALSO...SCATTERED MODERATE CONVECTION IS FROM 03N TO 06N BETWEEN
80W AND 82W UNDER AN AREA OF UPPER LEVEL DIFFLUENCE.

...DISCUSSION...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N117W TO
25N122W TO 13N130W. UPPER LEVEL SOUTHWEST WIND FLOW IS WITHIN
420 NM TO 580 NM TO THE EAST AND SOUTHEAST OF THE TROUGH WHICH
IS TRANSPORTING DEEP TROPICAL MOISTURE TO THE NORTHEAST. THE
SOUTHWEST WIND FLOW IS MOVING FROM 11N125W BEYOND 25N108W INTO
MEXICO. BROAD MIDDLE LEVEL TO UPPER LEVEL ANTICYCLONIC WIND FLOW
COVERS THE AREA TO THE EAST OF THE SOUTHWEST WIND FLOW... FROM
MEXICO AND CENTRAL AMERICA TO THE ITCZ.

A SURFACE RIDGE EXTENDS FROM A 1032 MB HIGH PRESSURE CENTER THAT
IS NEAR 35N144W THROUGH 32N139W TO 18N106W. THE PRESSURE
GRADIENT SW OF THE RIDGE AND N OF THE LOWER PRESSURES ASSOCIATED
WITH THE ITCZ IS TIGHT ENOUGH TO SUPPORT FRESH TO STRONG NE
TRADES ACROSS THE W CENTRAL WATERS. COMBINED SEAS ARE 8-11 FT IN
MIXED NE WIND WAVES AND LONG PERIOD SW AND NW SWELLS. THESE
CONDITIONS ARE FORECAST TO PERSIST ACROSS THE W CENTRAL WATERS
THROUGH THE NEXT 48 HOURS.

GALE FORCE NORTHERLY WINDS ARE BLOWING IN THE WATERS THAT ARE
OFF THE NORTHERN CALIFORNIA REDWOOD COAST. THESE WINDS ARE
GENERATING NORTHERLY SWELL WITH SEA HEIGHTS THAT RANGE FROM 8-11
FT THAT ARE PROPAGATING SOUTHWARD INTO THE NORTH CENTRAL PART OF
THE DISCUSSION AREA. THESE SEAS WILL PERSIST THROUGH EARLY FRI
GRADUALLY SUBSIDING TO LESS THAN 8 FT BY SAT AFTERNOON AS THE
GALE FORCE WIND EVENT THAT IS TAKING PLACE ENDS.

THE GULF OF CALIFORNIA...A SURFACE TROUGH EXTENDS FROM SOUTHWEST
ARIZONA INTO THE FAR NORTHWEST SECTION OF THE GULF OF
CALIFORNIA. THE SURFACE PRESSURE GRADIENT THAT SURROUNDS THIS
TROUGH WILL STRENGTHEN THIS EVENING GIVING SOUTH-TO-SOUTHWEST
WIND SPEEDS OF 20-25 KT ON THE EASTERN SIDE OF THE TROUGH.
PULSES OF THESE STRONGER WIND SPEEDS WILL PULSE FROM THE
MIDNIGHT/EARLY MORNING HOURS UNTIL THE MIDDAY HOURS FOR TONIGHT
AND AGAIN FRI NIGHT. THE SEA HEIGHTS WILL BE LOWER THAN 8 FEET
DURING THE NEXT 48 HOURS.

GULF OF PAPAGAYO...GAP WIND FLOW WILL PULSE TO FRESH TO STRONG
LEVELS LATE TONIGHT INTO EARLY FRI WITH THE ASSISTANCE OF
NOCTURNAL DRAINAGE FLOW.

$$
LEWITSKY



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