000
AXNT20 KNHC 262316
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
805 PM EDT FRI MAR 25 2011

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTION 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.

...ITCZ...

ITCZ AXIS IS ANALYZED FROM SIERRA LEONE AT 07N12W TO 04N20W 
CROSSING THE EQUATOR NEAR 35W THEN INTO NE BRAZIL AT 03S41W. 
SCATTERED SHOWERS ARE FROM 05N-06N BETWEEN 16W-20W...AND FROM 
04S-03N BETWEEN 33W-41W. 

...DISCUSSION...

GULF OF MEXICO...
SURFACE RIDGING IS PRODUCING 10-20 KT SOUTHERLY RETURN FLOW OVER 
THE GULF OF MEXICO WITH STRONGEST WINDS OVER THE W GULF W OF 90W 
WHERE THE SURFACE PRESSURE GRADIENT IS TIGHTENING UP. MOSTLY 
FAIR WEATHER DOMINATES THE ENTIRE GULF. IN THE UPPER LEVELS 
ZONAL FLOW PREVAILS WITH A BAND OF UPPER MOISTURE AND SCATTERED 
HIGH CLOUDS OVER THE NW GULF N OF 22N W OF 90W. THE REMAINDER OF 
THE GULF HAS STRONG SUBSIDENCE INHIBITING CONVECTION. EXPECT 
LITTLE CHANGE OVER THE NEXT 24 HOURS. 

CARIBBEAN SEA...
A 1006 MB LOW IS CENTERED OVER N COLOMBIA NEAR 09N75W. SCATTERED 
MODERATE TO ISOLATED STRONG CONVECTION IS FROM 05N-12N BETWEEN 
71W-77W. ELSEWHERE...SCATTERED MODERATE CONVECTION IS OVER THE 
NW CARIBBEAN FROM 16N-19N BETWEEN 83W-85W. 10-20 KT TRADEWINDS 
DOMINATES THE CARIBBEAN SEA AND CENTRAL AMERICA. STRONGEST WINDS 
ARE ALONG THE COAST OF N COLOMBIA. PATCHES OF BROKEN LOW CLOUDS 
WITH SCATTERED SHOWERS ARE ALSO OVER THE HIGHER ELEVATIONS OF 
PUERTO RICO...AND HISPANIOLA. MORE SHOWERS ARE OVER THE LEEWARD 
ISLANDS FROM 14N-16N BETWEEN 60W-62W. IN THE UPPER 
LEVELS...BROAD RIDGING IS OVER THE CARIBBEAN WITH SCATTERED HIGH 
CLOUD S OF 17N W OF 80W. STRONG SUBSIDENCE IS OVER THE REMAINDER 
OF THE AREA. EXPECT OVER THE NEXT 24 HOURS FOR BROKEN LOW CLOUDS 
AND SCATTERED SHOWERS TO BE OVER THE S CARIBBEAN S OF 15N. 

ATLANTIC OCEAN...
A 1019 MB HIGH IS LOCATED OVER THE CENTRAL ATLANTIC NEAR 24N54W. 
SURFACE RIDGING EXTENDS W TO THE NORTHERN BAHAMAS PRODUCING FAIR 
WEATHER. A WEAK SURFACE TROUGH IS OVER THE CENTRAL ATLANTIC 
ALONG 28N36W 23N39W. SCATTERED SHOWERS ARE WITHIN 30 NM OF THE 
TROUGH. ANOTHER 1023 MB HIGH IS OVER THE E ATLANTIC NEAR 30N29W. 
IN THE UPPER LEVELS...MOSTLY ZONAL FLOW AND STRONG SUBSIDENCE 
DOMINATES THE ATLANTIC. EXPECT LITTLE CHANGE OVER THE NEXT 24 
HOURS. 

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

$$
FORMOSA