000
AXNT20 KNHC 090445
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
205 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0515 UTC.

...ITCZ...

ITCZ AXIS IS ALONG 7N10W 3N20W CROSSING THE EQUATOR NEAR 25W 
CONTINUING T0 BRAZIL NEAR 3S40W. SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTION IS FROM 1N-3N BETWEEN 17W-28W...AND FROM 2S-4S 
BETWEEN 34W-37W.  

...DISCUSSION...

GULF OF MEXICO...
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 1021 MB HIGH IS OVER THE W ATLANTIC NEAR 30N70W PRODUCING FAIR 
WEATHER. A DISSIPATING STATIONARY FRONT IS OVER THE CENTRAL 
ATLANTIC FROM 32N39W TO 25N54W MOSTLY VOID OF ANY PRECIPITATION. 
A 1025 MB HIGH IS OVER THE E ATLANTIC NEAR 31N25W 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. 

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

$$
FORMOSA