000
AXNT20 KNHC 262318
TWDAT 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SUN APR 26 2009

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2315 UTC.

...THE ITCZ...
ITCZ AXIS IS CENTERED ALONG 4N8W 3N10W CROSSING THE EQUATOR NEAR 
24W TO 1S30W TO NE BRAZIL NEAR 4S39W. SCATTERED MODERATE TO 
STRONG CONVECTION IS FROM 1N-3S BETWEEN 5W-3E. ELSEWHERE... 
WIDELY SCATTERED MODERATE CONVECTION IS FROM 1N-2S BETWEEN 
15W-21W...AND FROM 4S-6S BETWEEN 27W-29W.

...DISCUSSION...

GULF OF MEXICO...
A 1033 MB HIGH IS CENTERED W OF BERMUDA PRODUCING SE RETURN FLOW 
OVER THE ENTIRE GULF OF MEXICO. 25-30 KT WINDS ARE OVER THE 
STRAITS OF FLORIDA WHILE 20-25 KT SE WINDS ARE OVER THE CENTRAL 
AND W GULF W OF 90W. BROKEN MULTILAYERED CLOUDS ARE ALONG THE 
COAST OF TEXAS. MOST OF THE REMAINDER OF THE GULF OF MEXICO HAS 
FAIR WEATHER. IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER 
THE W GULF W OF 92W. AN UPPER LEVEL TROUGH IS OVER THE E GULF. 
STRONG SUBSIDENCE COVERS THE GULF EXCEPT OVER THE NW GULF AND 
TEXAS WHERE UPPER LEVEL MOISTURE IS NOTED. EXPECT...THE UPPER 
LEVEL RIDGE TO MOVE E OVER THE NEXT 24 HOURS. ALSO EXPECT LITTLE 
CHANGE IN THE LOWER LEVELS OVER THE NEXT 24 HOURS. 

CARIBBEAN SEA...
FRESH TO STRONG TRADES ARE OVER THE CARIBBEAN SEA WITH STRONGEST 
WINDS W OF 70W. SCATTERED SHOWERS DOTS THE CARIBBEAN AND CENTRAL 
AMERICA ESPECIALLY OVER THE WINDWARD AND LEEWARD ISLANDS... 
PUERTO RICO...HISPANIOLA...JAMAICA...NICARAGUA...HONDURAS...THE 
GULF OF HONDURAS...BELIZE...COSTA RICA...AND PANAMA. CLUSTERS OF 
SCATTERED MODERATE CONVECTION ARE INLAND OVER S MEXICO...AND 
OVER NW COLOMBIA. IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS 
OVER THE CARIBBEAN. CONSIDERABLE UPPER LEVEL MOISTURE AND A BAND 
OF BROKEN HIGH CLOUD EXTENDS FROM HONDURAS TO THE WINDWARD 
PASSAGE. STRONG SUBSIDENCE IS OVER THE E CARIBBEAN E OF 70W. 
EXPECT...SHOWERS AND CONVECTION OVER THE CARIBBEAN W OF 70W OVER 
THE NEXT 24 HOURS.

ATLANTIC OCEAN...
A LARGE 1033 MB HIGH IS W OF BERMUDA NEAR 32N70W PRODUCING 
STRONG SE WINDS OVER FLORIDA AND FAIR WEATHER. THIS SAME HIGH IS 
PRODUCING UNSEASONABLY WARM SOUTHERLY WINDS OVER THE EASTERN 
UNITED STATES AS FAR N AS NEW JERSEY AND AS FAR W AS OKLAHOMA. A 
STATIONARY FRONT IS OVER THE CENTRAL ATLANTIC ALONG 32N51W 
27N57W. A SURFACE TROUGH CONTINUES TO 23N70W. SCATTERED SHOWERS 
ARE WITHIN 120 NM E OF THE FRONT. ANOTHER DOMINATE 1036 MB HIGH 
IS W OF THE AZORES NEAR 39N33W. THIS HIGH IS PRODUCING FAIR 
WEATHER AND NE-E SURFACE FLOW OVER THE ATLANTIC FROM 10N-30N E 
OF 50W. IN THE UPPER LEVELS...ZONAL FLOW IS OVER THE W ATLANTIC 
N OF 20N W OF 50W. AN UPPER LEVEL RIDGE IS OVER THE CENTRAL 
ATLANTIC N OF 20N BETWEEN 30W-50W. AN UPPER LEVEL LOW IS FURTHER 
E OVER THE CANARY ISLANDS NEAR 29N17W. IN THE TROPICS...AN UPPER 
LEVEL RIDGE CONTINUES FROM THE CARIBBEAN TO 50W. AN UPPER LEVEL 
TROUGH IS S OF 20N BETWEEN 30W-50W. AN UPPER LEVEL RIDGE IS S OF 
20N E OF 30W. EXPECT...THE FRONT OVER THE CENTRAL ATLANTIC TO 
DRIFT E WITH SHOWERS OVER THE NEXT 24 HOURS.

$$
FORMOSA