[Tropical] Tropical Weather Discussion

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AXNT20 KNHC 250539
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT THU MAR 25 2010

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...METEOROLOGICAL ANALYSIS...WEATHER
OBSERVATIONS...AND RADAR.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0345 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N10W 2N18W S OF THE EQUATOR NEAR
28W THEN INLAND OVER SOUTH AMERICA NEAR 1S46W. SCATTERED
MODERATE/STRONG CONVECTION IS WITHIN 150 NM N OF THE ITCZ FROM
14W-23W. CLUSTERS OF SIMILAR CONVECTION ARE FROM 5N TO S OF THE
EQUATOR E OF 30W ACROSS THE PRIME MERIDIAN.

...DISCUSSION...

GULF OF MEXICO...
A SURFACE RIDGE COVERS THE GULF AND THE W ATLC ANCHORED BY A
1021 MB HIGH E OF JACKSONVILLE FLORIDA AND AN UPPER LEVEL RIDGE
AXIS EXTENDING FROM THE E PACIFIC REGION ACROSS THE CARIBBEAN TO
JUST E OF THE FLORIDA PENINSULA COVERING THE ENTIRE GULF. A
UPPER TROUGH IS MOVING ACROSS TEXAS WITH THE UPPER LOW OVER THE
TEXAS PANHANDLE AND THE ASSOCIATED FRONTAL BOUNDARY EXPECTED TO
ENTER THE GULF LATER THIS MORNING. UPPER LEVEL MOISTURE IS BEING
DRAWN OVER THE W AND N GULF IN THE FORM OF HIGH CLOUDS. STRONG
SUBSIDENCE AND DRY STABLE ALOFT COVERS THE S GULF GIVING THAT
AREA GENERALLY CLEAR SKIES THIS MORNING.

CARIBBEAN SEA...
A SURFACE TROUGH EXTENDS FROM N OF HISPANIOLA INTO THE CARIBBEAN
ALONG THE HAITI/DOMINICAN REPUBLIC BORDER TO NEAR 14N71W
GENERATING ISOLATED SHOWERS INLAND AND ALONG THE IMMEDIATE
COASTAL WATERS OF HISPANIOLA. A BROAD UPPER RIDGE THAT COVERS
THE GULF OF MEXICO ALSO COVERS THE CARIBBEAN ANCHORED IN THE E
PACIFIC EXTENDING AN AXIS ACROSS CENTRAL AMERICA OVER CENTRAL
CUBA INTO THE W ATLC PROVIDING STRONG SUBSIDENCE AND DRY AIR
ALOFT ACROSS THE ENTIRE BASIN AS NOTED ON WATER VAPOR IMAGERY.
FRESH TO STRONG EASTERLY TRADE WINDS CONTINUE ACROSS THE BASIN
WITH PATCHES OF BROKEN/OVERCAST LOW CLOUDS AND POSSIBLE ISOLATED
SHOWERS OVER THE NW CARIBBEAN. OTHERWISE CLEAR SKIES AND FAIR
WEATHER DOMINATE REMAINDER OF THE CARIBBEAN.

ATLANTIC OCEAN...
A DEEP LAYERED RIDGE COVERS THE W ATLC WITH THE SURFACE RIDGE
ANCHORED BY A 1021 MB HIGH ABOUT 300 NM E OF JACKSONVILLE
FLORIDA NEAR 30N75W AND THE UPPER RIDGE AXIS EXTENDING FROM THE
CARIBBEAN ACROSS CENTRAL CUBA TO BEYOND 32N79W. A COLD FRONT
ENTERS THE W/CENTRAL ATLC NEAR 32N57W EXTENDING SW ALONG 27N63W
OVER THE TURKS AND CAICOS TO NEAR 21N72W. SCATTERED SHOWERS AND
POSSIBLE ISOLATED THUNDERSTORMS ARE WELL E OF THE FRONT WITHIN
90 NM OF LINE FROM 24N62W TO BEYOND 32N51W AND POSSIBLE ISOLATED
SHOWERS WITHIN 60 NM EITHER SIDE OF THE FRONT ITSELF. THE UPPER
LEVEL TROUGH SUPPORTING THIS FRONT COVERS THE W ATLC N OF 24N
BETWEEN 51W-68W. A SURFACE RIDGE DOMINATES THE REMAINDER OF THE
ATLC ANCHORED BY A 1026 MB HIGH NEAR 33N38W GIVING THE REMAINDER
OF THE AREA FAIR WEATHER TONIGHT.

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

$$
WALLACE





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