[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 261048
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1015 UTC...

...THE ITCZ...

FROM THE SIERRA LEONE COAST NEAR ALONG 13W TO 4N20W TO 2N30W
2N44W TO THE NORTHEASTERN COAST OF BRAZIL TO 1S52W. ISOLATED
MODERATE SHOWERS ARE TO THE SOUTH OF 11N15W 7N24W 8N45W 10N60W.

...DISCUSSION...

THE GULF OF MEXICO...
AN UPPER LEVEL TROUGH PASSES THROUGH CENTRAL ALABAMA TO THE
WESTERN FLORIDA PANHANDLE. A SURFACE TROUGH PASSES THROUGH
NORTH CENTRAL FLORIDA INTO THE EAST CENTRAL GULF OF MEXICO...
TO THE YUCATAN PENINSULA AND INTO NORTHERN GUATEMALA. A COLD
FRONT CUTS THROUGH SOUTHEASTERN ALABAMA INTO SOUTHEASTERN
LOUISIANA. A SECOND SURFACE TROUGH IS ABOUT 120 NM TO THE
SOUTHEAST OF THE COLD FRONT TO THE NORTH OF 28N. STRONG SHOWERS
AND THUNDERSTORMS ARE OFF THE FLORIDA WEST COAST FROM 26N TO
27N. THE CLOUD TOPS ARE BEING BLOWN NORTHEASTWARD...COVERING THE
ATLANTIC OCEAN TO THE NORTH OF 27N TO THE WEST OF 70W. OTHER
SHOWERS ARE FROM 23N TO 26N BETWEEN 83W AND 87W. A SECOND UPPER
LEVEL TROUGH PASSES THROUGH OKLAHOMA AND NORTHEASTERN TEXAS TO
THE UPPER TEXAS GULF COAST...INTO THE CENTRAL GULF OF MEXICO.
SURFACE ANTICYCLONIC FLOW COVERS THE WESTERN GULF OF MEXICO...TO
THE WEST OF 90W...MOVING AROUND A 1011 MB HIGH PRESSURE CENTER
THAT IS ALONG THE LOWER TEXAS COAST NEAR 26N97W. ..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 70W. 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 WESTERN CUBA TO EASTERN HONDURAS. THE 1012 MB
ISOBAR MOVES FROM HAITI BEYOND THE SOUTHEASTERN CARIBBEAN SEA
ISLANDS. THE PRESSURE PATTERN IS FLAT FROM 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 33N34W TO 28N38W TO 23N45W
TO 16N50W TO 13N55W. A DISSIPATING STATIONARY FRONT PASSES
THROUGH 32N30W TO 23N40W TO 19N50W TO 17N60W...INTO THE EASTERN
CARIBBEAN SEA NEAR 15N66W. A COLD FRONT IS WITHIN 60 NM TO 90 NM
TO THE NORTHWEST OF THE DISSIPATING STATIONARY FRONT TO THE NORTH
OF 20N. ISOLATED MODERATE SHOWERS AND THUNDERSTORMS ARE WITHIN
60 NM TO 90 NM ON EITHER SIDE OF 25N36W 28N30W BEYOND 32N26W.
SHOWERS ARE POSSIBLE WITHIN 30 NM TO 60 NM ON EITHER SIDE OF
18N59W 20N50W 23N40W 25N36W IN BROKEN TO OVERCAST MULTILAYERED
CLOUDS. SURFACE ANTICYCLONIC FLOW MOVES AROUND AN EASTERN
ATLANTIC OCEAN RIDGE THAT PASSES THROUGH 32N20W TO 20N33W TO
14N43W TO 12N54W. SURFACE ANTICYCLONIC FLOW COVERS THE ATLANTIC
OCEAN TO THE NORTH OF 20N BETWEEN 50W AND THE BAHAMAS...AROUND
A 1018 MB HIGH PRESSURE CENTER THAT IS NEAR 25N57W.

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

$$
MT





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