[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 260526
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT MON APR 26 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 0415 UTC...

...THE ITCZ...

FROM THE GUINEA COAST NEAR 9N13W TO 4N20W TO 2N30W 2N43W TO THE
NORTHEASTERN COAST OF BRAZIL NEAR THE EQUATOR ALONG 51W.
STRONG SHOWERS AND THUNDERSTORMS ARE ALONG THE COASTS OF GUINEA
AND SIERRA LEONE FROM 8N TO 9N BETWEEN 12W AND 15W...NEAR THE
ITCZ AND NEAR AN UPPER LEVEL TROUGH. STRONG SHOWERS AND
THUNDERSTORMS ARE FROM 3N TO 4N BETWEEN 34W AND 36W. ISOLATED
MODERATE SHOWERS ARE ELSEWHERE TO THE SOUTH OF 7N BETWEEN 8W
AND 52W.

...DISCUSSION...

THE GULF OF MEXICO...
AN UPPER LEVEL TROUGH STARTS IN OHIO AND IT PASSES THROUGH
MISSISSIPPI AND ALABAMA TO THE WESTERN FLORIDA PANHANDLE.
A STATIONARY FRONT PASSES THROUGH SOUTHEASTERN GEORGIA TO THE
FLORIDA PANHANDLE INTO THE NORTH CENTRAL GULF OF MEXICO. ONE
SURFACE TROUGH IS JUST TO THE EAST OF THE STATIONARY FRONT...
PASSING THROUGH NORTH CENTRAL FLORIDA...INTO THE EASTERN GULF
OF MEXICO NEAR 26N86W TO THE NORTH CENTRAL COAST OF THE YUCATAN
PENINSULA...AND FINALLY INTO NORTH CENTRAL GUATEMALA. STRONG
SHOWERS AND THUNDERSTORMS ARE IN THE NORTHEASTERN COASTAL PLAINS
OF THE YUCATAN PENINSULA...AND IN THE NORTHEASTERN CORNER OF
GUATEMALA. SHOWERS AND THUNDERSTORMS ARE FROM 26N TO 28N BETWEEN
83W AND 85W...WITH THE CLOUD TOPS BEING BLOWN NORTHEASTWARD AS
FAR AS 32N76W IN THE WESTERN ATLANTIC OCEAN. A SECOND UPPER
LEVEL TROUGH PASSES THROUGH NORTH CENTRAL TEXAS INTO THE
NORTHWESTERN GULF OF MEXICO...INTO THE WEST CENTRAL GULF OF
MEXICO NEAR 24N96W. A SURFACE TROUGH CUTS THROUGH SOUTHERN
MISSISSIPPI...ACROSS SOUTHEASTERN AND SOUTH CENTRAL LOUISIANA...
TO THE MIDDLE TEXAS COAST NEAR 28N. SURFACE ANTICYCLONIC FLOW
MOVES AROUND A RIDGE THAT EXTENDS FROM A 1010 MB CENTRAL TEXAS
HIGH PRESSURE CENTER TO 29N99W...TO A 1009 MB HIGH PRESSURE
CENTER THAT IS ALONG THE LOWER TEXAS COAST...TO 24N92W IN
THE GULF OF MEXICO.

THE CARIBBEAN SEA...
BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA. THE TAIL
END OF A DISSIPATING STATIONARY FRONT REACHES 16N65W IN THE
NORTHEASTERN SECTION...FROM THE ATLANTIC OCEAN. SCATTERED TO
BROKEN MULTILAYERED CLOUDS AND POSSIBLE SHOWERS ARE TO THE NORTH
OF 15N BETWEEN 60W AND 68W. SCATTERED TO BROKEN HIGH CLOUDS COVER
MOST OF THE WESTERN TWO-THIRDS OF THE AREA. THE SURFACE PRESSURE
GRADIENT IS COMPARATIVELY WEAK. THE 1008 MB ISOBAR ENTERS THE
AREA THROUGH THE YUCATAN CHANNEL...REACHES HONDURAS...AND CURVES
WESTWARD. THE 1012 MB ISOBAR MOVES FROM CENTRAL CUBA TO SOUTHERN
HISPANIOLA...CURVING TO THE SOUTH OF PUERTO RICO...AND EVENTUALLY
PASSING OVER TRINIDAD. THE PRESSURE PATTERN IS FLAT FROM WESTERN
CUBA TO THE AREA JUST TO THE WEST OF JAMAICA...INTO A WIDE OPEN
SPACE THAT IS BETWEEN THE CARIBBEAN SEA ISLANDS AND NICARAGUA
AND COSTA RICA.

THE ATLANTIC OCEAN...
AN UPPER LEVEL TROUGH PASSES THROUGH 34N36W TO 28N37W TO 23N48W
TO 19N50W TO 15N55W. A DISSIPATING STATIONARY FRONT PASSES
THROUGH 32N30W TO 23N40W TO 19N50W TO 17N60W...INTO THE EASTERN
CARIBBEAN SEA NEAR 16N65W. A COLD FRONT IS WITHIN 160 NM TO THE
WEST OF THE DISSIPATING STATIONARY FRONT TO THE NORTH OF 22N.
SHOWERS ARE FROM 29N BEYOND 32N BETWEEN 28W AND 32W. SHOWERS ARE
POSSIBLE IN BUILDING CLOUDS FROM 21N TO 27N BETWEEN 30W AND 40W.
SURFACE ANTICYCLONIC FLOW MOVES AROUND AN EASTERN ATLANTIC OCEAN
RIDGE THAT PASSES THROUGH 33N20W TO 27N25W TO 18N38W AND 13N53W.
SURFACE ANTICYCLONIC FLOW COVERS THE ATLANTIC OCEAN TO THE NORTH
OF 20N BETWEEN 48W AND THE BAHAMAS...AROUND A 1019 MB HIGH
PRESSURE CENTER THAT IS NEAR 27N62W.

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

$$
MT



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