000
AXNT20 KNHC 052355
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST TUE MAR 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 EXTENDS FROM LIBERIA NEAR 5N10W TO 3N13W. THE 
ITCZ BEGINS AT 3N13W AND CONTINUES TO 1N30W TO BRAZIL NEAR 
1S49W. WIDELY SCATTERED MODERATE CONVECTION IS FROM 1N-4N 
BETWEEN 15W-30W. SCATTERED MODERATE CONVECTION IS FROM 1S-4N 
BETWEEN 33W-43W. 

...DISCUSSION...

THE GULF OF MEXICO...
AS OF 2100 UTC...A COLD FRONT EXTENDS FROM NEW ORLEANS LOUISIANA 
TO S OF BROWNSVILLE TEXAS NEAR 24N98W. THE FRONT IS VOID OF 
PRECIPITATION. 15-20 KT NORTHERLY WINDS ARE ALONG THE COASTS OF 
LOUISIANA AND TEXAS N OF THE FRONT. THE REMAINDER OF THE GULF OF 
MEXICO HAS 10-15 KT SOUTHERLY WINDS WITH FAIR WEATHER. IN THE 
UPPER LEVELS...MOSTLY ZONAL FLOW IS NOTED WITH STRONG SUBSIDENCE 
S OF 26N. UPPER LEVEL MOISTURE AND BROKEN HIGH CLOUD IS OVER THE 
N GULF N OF 26N. EXPECT...IN 24 HOURS FOR THE COLD FRONT TO 
EXTEND FROM S FLORIDA TO VERACRUZ MEXICO.  

THE CARIBBEAN SEA...
A COLD FRONT ENTERS THE LEEWARD ISLANDS NEAR 20N60W AND EXTENDS 
SW TO 16N67W. SCATTERED SHOWERS ARE WITHIN 60 NM OF THE FRONT. A 
BAND OF RESIDUAL LOW CLOUDS AND SCATTERED SHOWERS ARE OVER 
PUERTO RICO...HISPANIOLA...JAMAICA...AND THE SW CARIBBEAN FROM 
8N-16N BETWEEN 78W-87W TO INCLUDE THE COASTS OF PANAMA...COSTA 
RICA...AND NICARAGUA. SCATTERED MODERATE TO ISOLATED STRONG  
CONVECTION IS INLAND OVER N COLOMBIA...AND NW VENEZUELA NEAR 
LAKE MARACAIBO. 15 KT NORTHERLY WINDS ARE N OF THE COLD FRONT.  
10-20 KT TRADEWINDS ARE OVER THE REMAINDER OF THE CARIBBEAN SEA 
WITH STRONGEST WINDS ALONG THE COAST OF N COLOMBIA. IN THE UPPER 
LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER VENEZUELA NEAR 
9N63W PRODUCING S TO SW UPPER LEVEL FLOW OVER THE ENTIRE 
CARIBBEAN AND CENTRAL AMERICA. EXPECT OVER THE NEXT 24 HOURS FOR 
THE FRONT TO RETROGRADE BACK OVER THE NORTHERN LEEWARD ISLANDS 
WITH CONTINUED SHOWERS. 

THE ATLANTIC OCEAN...
A COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM 31N40W TO 26N50W 
TO THE LEEWARD ISLANDS AT 20N60W. SCATTERED SHOWERS ARE WITHIN 
60 NM OF THE FRONT. A REINFORCING COLD FRONT THAT IS MOSTLY VOID 
OF SHOWERS IS FURTHER W AND EXTENDS FROM 31N48W TO 24N60W TO N 
OF HISPANIOLA AT 23N68W. A GALE IS W OF THIS FRONT TO 60W N OF 
28N. A 1016 MB HIGH IS CENTERED OVER THE E ATLANTIC NEAR 22N37W 
MOVING E. OF NOTE IN THE UPPER LEVELS...ZONAL FLOW IS FROM 
20N-30N ACROSS THE OCEAN. EXPECT IN 24 HOURS FOR A NEW COLD 
FRONT TO BE OVER THE W ATLANTIC FROM 31N72W TO S FLORIDA WITH 
SHOWERS. ALSO EXPECT A NEW GALE TO BE W OF THIS FRONT. 
FURTHERMORE EXPECT THE OTHER TWO FRONTS TO MERGE WITH MORE 
SHOWERS. 

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

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FORMOSA