000
AXNT20 KNHC 301802
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
205 PM EDT WED MAR 30 2011

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTION 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1715 UTC.

...THE ITCZ...

FROM THE LIBERIA COAST NEAR 5N9W TO 2N20W TO THE EQUATOR ALONG
28W TO 1S46W. ISOLATED MODERATE RAINSHOWERS TO LOCALLY STRONG 
THUNDERSTORMS ARE WITHIN 150 NM TO 210 NM ON EITHER SIDE OF
5N10W...TO THE EQUATOR ALONG 26W...TO THE EQUATOR ALONG 39W...
TO 1S50W.

...DISCUSSION...

THE GULF OF MEXICO...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH SUPPORTS THE CURRENT 
FRONTAL BOUNDARY THAT COVERS THE TEXAS COASTAL WATERS AND THE 
NORTH CENTRAL GULF OF MEXICO COASTAL WATERS AND COASTAL PLAINS.
SURFACE LOW PRESSURE COVERS THE COASTAL PLAINS AND COASTAL 
WATERS FROM SOUTHWESTERN ALABAMA TO SOUTHEASTERN LOUISIANA.
A WARM FRONT COVERS NORTHWESTERN FLORIDA. A SEPARATE COLD FRONT
CUTS THROUGH SOUTHEASTERN LOUISIANA TO THE DEEP SOUTH OF TEXAS
AND EXTREME NORTHEASTERN MEXICO. NUMEROUS STRONG RAINSHOWERS
AND THUNDERSTORMS ARE FROM 29N TO 31N BETWEEN 84W AND 87W
IN THE NORTHEASTERN CORNER OF THE AREA. CLOUDS AND OTHER 
POSSIBLE RAINSHOWERS ARE WITHIN 120 NM OF THE U.S.A.
GULF COAST TO THE WEST OF 87W.

THE CARIBBEAN SEA...
A SURFACE TROUGH CURVES FROM 23N60W IN THE ATLANTIC OCEAN TO 
20N65W...ACROSS EXTREME EASTERN PUERTO RICO TO 16N66W. BROKEN
TO OVERCAST LOW LEVEL AND MIDDLE LEVEL CLOUDS AND POSSIBLE 
RAINSHOWERS COVER THE CARIBBEAN SEA FROM 15N TO 20N BETWEEN
63W AND 66W...AND IN THE ATLANTIC OCEAN FROM 20N TO 26N BETWEEN
50W AND 60W...AND FROM 20N TO 24N BETWEEN 60W AND 70W.
BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW COVERS THE AREA
IN GENERAL.

THE ATLANTIC OCEAN...
A SHORTWAVE MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH
32N58W TO 27N65W. THIS TROUGH IS MOVING THROUGH AN AREA OF 
ALREADY-EXISTING BROAD UPPER LEVEL CYCLONIC FLOW. THE ATLANTIC 
COLD FRONT/STATIONARY FRONT ALREADY IS BEING SUPPORTED THE BROAD 
UPPER LEVEL CYCLONIC FLOW. THE COLD FRONT PASSES THROUGH 32N50W
TO 28N60W TO 27N66W. THE FRONT BECOMES STATIONARY FROM 27N66W
TO 29N72W. SURFACE ANTICYCLONIC WIND FLOW MOVES AROUND A RIDGE
THAT PASSES THROUGH 32N23W TO 26N39W TO 23N57W.

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

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MT