000
AXNT20 KNHC 010546
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
205 AM EDT THU APR 01 2010

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0345 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 5N7W 3N14W 3N30W CROSSING THE 
EQUATOR TO INLAND OVER SOUTH AMERICA NEAR 48W. CLUSTERS OF 
SCATTERED MODERATE/ISOLATED STRONG CONVECTION ARE FROM 1N TO THE 
ITCZ BETWEEN 10W-27W. 

...DISCUSSION...

GULF OF MEXICO...
A SURFACE RIDGE DOMINATES THE GULF ANCHORED BY A 1021 MB HIGH 
NEAR 28N86W. AN UPPER LEVEL SHEAR AXIS EXTENDS FROM THE W ATLC 
ACROSS S FLORIDA ALONG 25N90W TO 23N94W. STRONG SUBSIDENCE AND 
VERY DRY STABLE AIR ALOFT COVER ALL THE GULF WITH A LARGE UPPER 
RIDGE ANCHORED OVER W TENNESSEE. THUS...CLEAR SKIES REMAIN 
ACROSS THE GULF AGAIN TONIGHT. THE NEXT FRONT IS EXPECTED TO 
ENTER THE NW GULF FRI NIGHT/EARLY SAT. 

CARIBBEAN SEA...
BROAD UPPER RIDGE COVERS THE CARIBBEAN WITH MODERATE/STRONG 
SUBSIDENCE AND DRY STABLE AIR NOTED ON WATER VAPOR IMAGERY.   
FRESH TO STRONG TRADE WINDS ARE OVER THE CARIBBEAN WITH THE 
STRONGEST WINDS ALONG THE N COAST OF COLOMBIA. SCATTERED SHOWERS 
ARE OVER THE SW CARIBBEAN S OF 13N W OF 80W TO INLAND CENTRAL 
AMERICA WITH CLUSTERS OF ARE OVER HAITI...E CUBA...JAMAICA AND 
THE IMMEDIATE COASTAL WATERS WHILE THE REMAINDER OF THE 
CARIBBEAN HAS CLEAR SKIES TONIGHT. 

ATLANTIC OCEAN...
THE SURFACE RIDGE OVER THE GULF OF MEXICO EXTENDS ACROSS THE 
FLORIDA PENINSULA TO OVER THE W ATLC TO 70W INCLUDING THE BAHAMA 
ISLANDS AND A 1020 MB HIGH NEAR 25N78W. A COLD FRONT ENTERS THE 
REGION E OF BERMUDA NEAR 32N58W EXTENDING ALONG 25N64W JUST E OF 
THE TURKS AND CAICOS TO THE NW COAST OF HAITI NEAR 20N73W. THE 
UPPER TROUGH SUPPORTING THIS FRONT IS N OF 25N WITH THE UPPER 
LEVEL LOW N OF BERMUDA. THE UPPER RIDGE OVER THE CARIBBEAN 
EXTENDS A RIDGE AXIS N ACROSS THE VIRGIN ISLANDS TO BEYOND 
32N53W PROVIDING DIFFLUENCE ALOFT TO GENERATE SCATTERED SHOWERS 
AND POSSIBLE ISOLATED THUNDERSTORMS N OF 26N BETWEEN 50W AND THE 
FRONT. A 1012 MB LOW IS IN THE E/CENTRAL ATLC NEAR 28N42W AND A 
SURFACE TROUGH EXTENDING FROM THE LOW ALONG 27N38W TO 23N39W AND 
A SECOND SURFACE TROUGH EXTENDING FROM 30N36W ALONG 25N35W 
20N41W TO 19N51W. SCATTERED SHOWERS AND POSSIBLE ISOLATED 
THUNDERSTORMS ARE FROM 25N-30N BETWEEN 30W-39W. THE UPPER LEVEL 
SUPPORT FOR THIS FRONT IS N OF 21N BETWEEN 25W-45W WITH THE 
UPPER LEVEL LOW NEAR 28N38W. A SURFACE RIDGE COVERS THE E ATLC N 
OF 23N E OF 32W ANCHORED BY A 1029 MB HIGH JUST N OF THE AZORES. 
 
FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
WALLACE