[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 041158
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT MON APR 04 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1115 UTC.

...THE ITCZ...

FROM SOUTHERN LIBERIA TO 2N20W...CROSSING THE EQUATOR ALONG
30W...REACHING BRAZIL NEAR 2S46W. ISOLATED MODERATE RAINSHOWERS
ARE TO THE SOUTH OF 07N TO THE EAST OF 51W.

...DISCUSSION...

THE GULF OF MEXICO...
MIDDLE LEVEL TO UPPER LEVEL WESTERLY TO SOUTHWESTERLY WIND FLOW
COVERS THE AREA FROM MEXICO INTO THE GULF OF MEXICO...AND BEYOND
FLORIDA INTO THE WESTERN ATLANTIC OCEAN. A SURFACE RIDGE PASSES
THROUGH AN ATLANTIC OCEAN 1024 MB HIGH PRESSURE CENTER THAT IS
NEAR 32N72W...ACROSS NORTHERN FLORIDA TO SOUTHEASTERN
LOUISIANA...AND BEYOND THE UPPER TEXAS COAST.

THE CARIBBEAN SEA...
UPPER LEVEL SOUTHWESTERLY WIND FLOW COVERS THE AREA AT THIS
MOMENT. RAINSHOWERS ARE POSSIBLE TO THE SOUTH OF 16N BETWEEN
TRINIDAD AND 66W...FROM 16N TO 19N BETWEEN 67W AND 80W...AND TO
THE SOUTH OF 13N BETWEEN 76W AND THE COAST OF CENTRAL AMERICA.
OTHER RAINSHOWERS ARE POSSIBLE IN LINES OF LOW CLOUDS THROUGHOUT
THE REST OF THE AREA.

THE ATLANTIC OCEAN...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N58W TO
27N60W. THIS TROUGH SUPPORTS A COLD FRONT THAT PASSES THROUGH
32N49W TO 26N57W TO 22N67W. WHAT WAS A SECOND COLD FRONT
FROM SIX HOURS AGO CAUGHT UP TO AND MERGED WITH WHAT WAS
A DISSIPATING COLD FRONT FROM SIX HOURS AGO. RAINSHOWERS ARE
POSSIBLE WITHIN 30 NM ON EITHER SIDE OF THE LINE THAT PASSES
THROUGH 32N47W TO 26N55W TO 24N64W. A RE-INFORCING SHOT OF COLD
AIR AND COMPARATIVELY FASTER WIND SPEEDS ARE ASSOCIATED WITH
WHAT IS NOW THE COLD FRONT. SURFACE ANTICYCLONIC WIND FLOW MOVES
AROUND A RIDGE THAT PASSES THROUGH 33N23W TO 28N33W 24N50W AND
21N60W. GALE FORCE WIND CONDITIONS ARE FORECAST TO DEVELOP NEAR
THE MOROCCO COAST BECAUSE OF A 1003 MB LOW PRESSURE CENTER THAT
IS INLAND NEAR 28N7W IN WESTERN ALGERIA. PLEASE REFERENCE THE
METEO FRANCE MARINE FORECASTS REGARDING ITS AREAS THAT ARE TO
THE EAST OF 35W.

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

$$
MT



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