[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 261737
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 PM 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1715 UTC...

...THE ITCZ...
THE ITCZ IS CENTERED ALONG 9N13W 1N28W 3N43W 1N50W. WIDELY
SCATTERED MODERATE CONVECTION IS ALONG THE COAST OF WEST AFRICA
FROM 2N-5N BETWEEN 7W-12W. ISOLATED MODERATE CONVECTION IS FROM
2N-4N BETWEEN 20W-22W. SCATTERED MODERATE CONVECTION IS FROM
3N-5N BETWEEN 26W-31W. ISOLATED MODERATE CONVECTION IS FROM
1S-4N BETWEEN 33W-41W.

...DISCUSSION...

THE GULF OF MEXICO...
AS OF 1500 UTC...A COLD FRONT EXTENDS FROM N FLORIDA TO THE SE
GULF OF MEXICO TO JUST N OF THE YUCATAN PENINSULA ALONG 30N82W
25N84W TO 21N92W. A SQUALL LINE IS OVER SOUTH FLORIDA AND THE SE
GULF ALONG 26N80W 23N84W. SCATTERED MODERATE TO STRONG
CONVECTION WITH FREQUENT LIGHTNING ARE WITHIN 30 NM OF THE
SQUALL LINE. WIND GUSTS OF 42 KT HAVE BEEN REPORTED ALONG THE
SQUALL LINE AT HOMESTEAD FLORIDA. FURTHER W...A 1014 MB HIGH IS
CENTERED OVER THE W CARIBBEAN NEAR 24N97W PRODUCING FAIR
WEATHER.
15-20 KT NW SURFACE WINDS ARE N OF THE COLD FRONT WHILE 20-25 KT
SW WINDS ARE S OF THE FRONT. IN THE UPPER LEVELS...AN UPPER
LEVEL TROUGH IS OVER THE GULF WITH AXIS ALONG 90W PRODUCING
MOSTLY WESTERLY FLOW. CONSIDERABLE UPPER LEVEL HIGH CLOUDS AND
UPPER LEVEL MOISTURE ARE OVER S FLORIDA AND THE SE GULF. STRONG
SUBSIDENCE IS OVER THE REMAINDER OF THE GULF. EXPECT IN 12
HOURS...FOR THE COLD FRONT TO BE OUT OF THE GULF. ALSO EXPECT IN
24 HOURS FOR A SURFACE HIGH TO BE CENTERED OVER CENTRAL TEXAS.

THE CARIBBEAN SEA...
FRESH TO STRONG TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH
STRONGEST WINDS ALONG THE COASTS OF N COLOMBIA AND VENEZUELA. A
1008 MB LOW IS CENTERED OVER N COLOMBIA NEAR 6N74W. SCATTERED
MODERATE TO STRONG CONVECTION IS NOTED OVER THE SW CARIBBEAN
FROM 10N-13N BETWEEN 75W-82W. ISOLATED SHOWERS ARE OVER THE
LEEWARD ISLANDS N OF 17N E OF 68W. MOSTLY FAIR WEATHER IS OVER
THE WINDWARD ISLANDS. IN THE UPPER LEVELS...MOSTLY ZONAL FLOW
COVERS THE AREA. SIGNIFICANT UPPER LEVEL MOISTURE AND BROKEN
HIGH CLOUDS ARE OVER THE CARIBBEAN W OF 67W. STRONG SUBSIDENCE
IS OVER THE WINDWARD ISLANDS. EXPECT IN 24 HOURS FOR THE COLD
FRONT TO EXTEND FROM CENTRAL CUBA TO CANCUN MEXICO WITH
CONVECTION. ALSO EXPECT MORE CONVECTION OVER THE SW CARIBBEAN
AND CENTRAL AMERICA S OF HONDURAS.

THE ATLANTIC OCEAN...
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS OVER THE W
ATLANTIC N OF THE NORTHERN BAHAMAS AND W OF 73W DUE TO
PREFRONTAL CONVECTION AND A SQUALL LINE REACHING THE NORTHERN
BAHAMAS. A 10120 MB HIGH IS CENTERED OVER THE CENTRAL ATLANTIC
NEAR 27N653W PRODUCING FAIR WEATHER AND MOVING E. A COLD FRONT
IS OVER THE E ATLANTIC FROM 32N29W TO 23N37W 18N47W. ISOLATED
MODERATE CONVECTION IS FROM 25N-28N BETWEEN 31W-34W. IN THE
UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER THE W ATLANTIC N OF
20N W OF 55W. AN UPPER LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC
N OF 10N BETWEEN 35W-55W. AN UPPER LEVEL RIDGE IS OVER THE E
ATLANTIC E OF 35W. AN UPPER LEVEL HIGH IS CENTERED OVER THE
TROPICAL ATLANTIC NEAR 5N30W. EXPECT IN 24 HOURS FOR THE W
ATLANTIC FRONT TO EXTEND FROM 32N68W TO CENTRAL CUBA WITH
SHOWERS. ALSO EXPECT THE E ATLANTIC FRONT TO MOVE E TO 32N22W
WITH SHOWERS.

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

$$
FORMOSA





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