[Tropical] Tropical Weather Discussion

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AXNT20 KNHC 111725
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT MON APR 11 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 1645 UTC.

...THE ITCZ...

FROM THE COAST OF THE IVORY COAST NEAR 5N4W TO 3N10W TO 1N20W...
CROSSING THE EQUATOR ALONG 28W TO 4S38W NEAR THE BRAZIL COAST.
SCATTERED TO NUMEROUS STRONG RAINSHOWERS AND THUNDERSTORMS ARE
FROM THE EQUATOR TO 2N BETWEEN 15W AND 17W...FROM THE EQUATOR TO
3N BETWEEN 23W AND 25W...AND FROM THE EQUATOR TO 4S BETWEEN 35W
AND 38W. WIDELY SCATTERED MODERATE RAINSHOWERS TO ISOLATED
STRONG THUNDERSTORMS ARE ELSEWHERE TO THE SOUTH OF 7N13W
4N30W 2N50W.

...DISCUSSION...

THE GULF OF MEXICO...
A DEEP LAYER TROUGH IS MOVING THROUGH THE CENTRAL U.S.A. FROM
KANSAS TO TEXAS. THIS TROUGH SUPPORTS THE COLD FRONT THAT IS
MOVING THROUGH TEXAS...AND APPROACHING THE GULF COAST LITTLE BY
LITTLE. A SURFACE TROUGH IS WITHIN 90 NM OF THE TEXAS GULF COAST
FROM 26N TO THE TEXAS COAST NEAR 29N. THE SOUTHEASTERN CORNER OF
THE AREA IS AT THE EDGE OF A SEPARATE MIDDLE LEVEL TO UPPER
LEVEL TROUGH...THAT EXTENDS FROM THE CENTRAL ATLANTIC OCEAN...
THROUGH THE NORTHEASTERN CARIBBEAN SEA INTO THE SOUTHWESTERN
CORNER OF THE CARIBBEAN SEA. BROKEN TO OVERCAST LOW LEVEL CLOUDS
ARE TO THE NORTHWEST OF 29N91W 21N97W. SCATTERED LOW CLOUDS ARE
MOVING ACROSS THE GULF WATERS WITH THE SURFACE SOUTHERLY-TO-
SOUTHEASTERLY WIND FLOW.

THE CARIBBEAN SEA...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES OVER HISPANIOLA FROM
THE CENTRAL ATLANTIC OCEAN TO 100 NM TO THE SOUTH OF JAMAICA...
INTO THE SOUTHWESTERN CORNER OF THE AREA. CLUSTERS OF LOW CLOUDS
AND POSSIBLE RAINSHOWERS ARE FROM 15N TO 17N BETWEEN 67W AND
69W...IN THE DOMINICAN REPUBLIC AND THE WATERS THAT ARE TO THE
SOUTH OF HAITI FROM 16N TO THE COAST BETWEEN 73W AND 75W...FROM
17N TO 20N BETWEEN 78W AND 80W...AND TO THE WEST OF THE LINE
THAT GOES FROM THE PANAMA NEAR 9N80W TO 12N83W ALONG THE
SOUTHEASTERN COAST OF NICARAGUA. OVERCAST MULTILAYERED CLOUDS
AND POSSIBLE RAINSHOWERS ARE TO THE SOUTHEAST OF THE LINE THAT
PASSES THROUGH 20N60W TO 14N70W TO 12N72W NEAR THE PENINSULA DE
LA GUAJIRA OF NORTHEASTERN COLOMBIA. A SURFACE TROUGH EXTENDS
FROM THE NORTHEASTERN CARIBBEAN SEA ISLANDS NEAR 17N63W TO
14N64W TO 10N65W NEAR THE VENEZUELA COAST.

THE ATLANTIC OCEAN...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N57W IN
THE CENTRAL ATLANTIC OCEAN TO 26N63W...PASSING THROUGH 20N70W
AND BEYOND HISPANIOLA INTO THE CARIBBEAN SEA. THIS TROUGH
SUPPORTS A COLD FRONT THAT PASSES THROUGH 32N48W TO 28N60W TO
23N71W. A SHEAR AXIS CONTINUES FROM 23N71W TO 25N75W AND 29N77W.
RAINSHOWERS ARE POSSIBLE TO THE NORTH OF 20N BETWEEN 43W AND
60W...AND FROM 22N TO 28N BETWEEN 60W AND 70W. A SURFACE TROUGH
IS ALONG 25N58W TO 20N62W. RAINSHOWERS ARE POSSIBLE FROM 22N TO
24N BETWEEN 67W AND 74W IN THE SOUTHEASTERN BAHAMAS. SURFACE
ANTICYCLONIC WIND FLOW MOVES AROUND A RIDGE THAT PASSES OVER
BERMUDA TO 29N74W...TO THE NORTHWEST OF COLD FRONT AND SHEAR
AXIS. SURFACE ANTICYCLONIC WIND FLOW MOVES AROUND A RIDGE THAT
PASSES THROUGH 32N35W TO 27N40W TO 22N56W.

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

$$
MT






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