000
AXNT20 KNHC 060000
TWDAT 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL 
805 PM EDT FRI APR 05 2013

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...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL 
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2315 UTC.

...THE ITCZ/THE MONSOON TROUGH... 

THE MONSOON TROUGH PASSES THROUGH COASTAL SIERRA LEONE NEAR 
8N13W AND EXTENDS TO 4N15W. THE ITCZ CONTINUES FROM 4N15W TO 
2N20W TO 1N30W TO THE COAST OF BRAZIL AT 3S44W. WIDELY SCATTERED 
MODERATE CONVECTION IS FROM 2S-4N BETWEEN 20W-33W. 

...DISCUSSION...

GULF OF MEXICO...                                                

AS OF 2100 UTC... A COLD FRONT EXTENDS FROM COCOA BEACH FLORIDA 
AT 28N81W TO W CUBA AT 23N84W. SCATTERED MODERATE CONVECTION IS 
OVER S FLORIDA...THE STRAITS OF FLORIDA...AND CUBA WITHIN 240 NM 
E OF FRONT. A 1024 MB HIGH IS CENTERED ALONG THE COAST OF TEXAS 
NEAR 29N96W. BROKEN TO OVERCAST LOW CLOUDS ARE OVER THE GULF OF 
MEXICO E OF 92W. 15-20 KT NORTHERLY WINDS ARE OVER THE GULF W OF 
FRONT. IN THE UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER THE 
GULF WITH AXIS ALONG 85W. STRONG SUBSIDENCE COVERS MOST OF THE 
GULF. EXPECT IN 24 HOURS FOR...SURFACE HIGH PRESSURE RETURN FLOW 
TO DOMINATE THE GULF WITH 10-15 KT E TO SE FLOW AND MOSTLY FAIR 
WEATHER. 

CARIBBEAN SEA...                                                

A COLD FRONT EXTENDS FROM W CUBA AT 23N84W TO N HONDURAS AT 
16N86W. PREFRONTAL WIDELY SCATTERED MODERATE CONVECTION EXTENDS 
WITHIN 180 NM E OF FRONT. 10-15 KT N WINDS ARE W OF FRONT. 10-20 
KT TRADEWINDS ARE OVER THE REMAINDER OF THE CARIBBEAN SEA WITH 
STRONGEST WINDS ALONG THE COAST OF N COLOMBIA. SCATTERED SHOWERS 
ARE OVER THE MONA PASSAGE AND THE DOMINICAN REPUBLIC N OF 17N 
BETWEEN 67W-70W. SIMILAR SCATTERED SHOWERS ARE OVER THE LEEWARD 
ISLANDS N OF 15N E OF 65W. MORE SCATTERED SHOWERS ARE OVER N 
COLOMBIA...PANAMA...AND COSTA RICA DUE TO A MONSOON TROUGH. 
MOSTLY FAIR WEATHER IS OVER THE REMAINDER OF THE CARIBBEAN SEA. 
IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER THE CARIBBEAN 
WITH AXIS ALONG 70W. UPPER LEVEL MOISTURE AND BROKEN HIGH CLOUDS 
OVER CENTRAL AMERICA S OF HONDURAS...THE W CARIBBEAN 
...AND CUBA. EXPECT IN 24 HOURS FOR THE COLD FRONT TO EXTEND 
FROM E CUBA TO NICARAGUA WITH SHOWERS AND CONVECTION. ALSO 
EXPECT THE SHOWERS OVER THE LEEWARD ISLANDS TO MOVE ENE. 

ATLANTIC OCEAN...                                               

A COLD FRONT EXTENDS FROM 32N73W TO COCOA BEACH FLORIDA AT 
28N81W. WIDELY SCATTERED MODERATE CONVECTION IS WITHIN 240 NM SE 
OF FRONT TO INCLUDE MOST OF THE BAHAMAS. SCATTERED SHOWERS ARE N 
OF THE LEEWARD ISLANDS FROM 20N-23N BETWEEN 61W-64W. A 1030 MB 
HIGH IS OVER THE CENTRAL ATLANTIC NEAR 35N49W. THE TAIL END OF A 
COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM 32N38W TO 26N53W.  
SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT. A 1028 MB HIGH 
IS CENTERED OVER THE E ATLANTIC NEAR 31N29W MOVING NE. OF NOTE 
IN THE UPPER LEVELS...UPPER LEVEL DIFFLUENCE IS OVER THE W 
ATLANTIC ENHANCING THE CONVECTION. AN UPPER LEVEL TROUGH IS ALSO 
OVER THE CENTRAL ATLANTIC BETWEEN 30W-55W SUPPORTING THE CENTRAL 
ATLANTIC FRONT. EXPECT OVER THE NEXT 24 HOURS FOR BOTH FRONTS TO 
MOVE E WITH CONVECTION WITHIN 240 NM E OF THE WESTERN ATLANTIC 
FRONT...AND SCATTERED SHOWERS ALONG THE E ATLANTIC FRONT. 

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

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FORMOSA