000
AXNT20 KNHC 091047
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT SAT APR 09 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1045 UTC.

...ITCZ...

ITCZ AXIS IS ALONG 8N13W 3N20W CROSSING THE EQUATOR NEAR 26W 
CONTINUING T0 BRAZIL NEAR 3S43W. WIDELY SCATTERED MODERATE 
CONVECTION IS FROM EQ-3N BETWEEN 16W-21W...AND ALONG THE COAST 
OF BRAZIL FROM 2S-8S BETWEEN 34W-40W. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS FROM 1S-2N BETWEEN 25W-30W...AND 
FROM 2S-7S BETWEEN 22W-28W. 

...DISCUSSION...

GULF OF MEXICO...
AS OF 0900 UTC...A SURFACE RIDGE AXIS EXTENDS FROM THE W 
ATLANTIC ALONG 30N PRODUCING 10-20 KT SE WINDS AND FAIR WEATHER 
OVER THE GULF OF MEXICO. STRONGEST WINDS ARE OVER THE W GULF W 
OF 90W WHERE THE SURFACE GRADIENT TIGHTENS UP. IN THE UPPER 
LEVELS...A RIDGE AXIS IS ALONG 90W. UPPER LEVEL MOISTURE AND 
SCATTERED HIGH CLOUDS ARE OVER THE N GULF N OF 28N. STRONG 
SUBSIDENCE IS OVER THE REMAINDER OF THE GULF. EXPECT LITTLE 
CHANGE OVER THE NEXT 24 HOURS.  

CARIBBEAN SEA...
15-20 KT TRADEWINDS ARE OVER THE CARIBBEAN SEA AND CENTRAL 
AMERICA WITH STRONGEST WIND ALONG THE COAST OF N COLOMBIA. 
PATCHES OF BROKEN LOW CLOUDS AND SCATTERED SHOWERS ARE OVER THE 
WINDWARD ISLANDS AND THE SW CARIBBEAN...N COLOMBIA...PANAMA... 
AND COSTA RICA. IN THE UPPER LEVELS...ZONAL FLOW DOMINATES. 
UPPER LEVEL MOISTURE AND SCATTERED HIGH CLOUDS ARE OVER THE S 
CARIBBEAN S OF 12N. STRONG SUBSIDENCE IS OVER THE REMAINDER OF 
THE CARIBBEAN. EXPECT LITTLE CHANGE OVER THE NEXT 24 HOURS.  

ATLANTIC OCEAN...
A 1020 MB HIGH IS OVER THE W ATLANTIC NEAR 29N63W PRODUCING FAIR 
WEATHER. A DISSIPATING STATIONARY FRONT IS OVER THE CENTRAL 
ATLANTIC FROM 32N40W TO 26N52W MOSTLY VOID OF ANY PRECIPITATION. 
A 1025 MB HIGH IS OVER THE E ATLANTIC NEAR 33N24W ALSO PRODUCING 
FAIR WEATHER. IN THE UPPER LEVELS...AN UPPER LEVEL LOW IS 
CENTERED OVER THE CANARY ISLANDS. MOSTLY ZONAL FLOW IS OVER THE 
REMAINDER OF THE ATLANTIC. EXPECT THE FRONT TO COMPLETELY 
DISSIPATE OVER THE NEXT 24 HOURS. ALSO EXPECT ANOTHER COLD FRONT 
TO MOVE S INTO THE W ATLANTIC TO 32N62W TO 28N70W IN 24 HOURS 
WITH SHOWERS.

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

$$
FORMOSA