000
AXNT20 KNHC 050538
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST THU MAR 05 2009

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 GOES-12 SATELLITE 
IMAGERY THROUGH 0345 UTC...AND METEOSAT-9 IMAGERY THROUGH
0500 UTC.

...THE ITCZ...

FROM SOUTHERN COASTAL LIBERIA TO 1N20W...CROSSING THE EQUATOR 
ALONG 24W...2SN36W...INTO NORTHEASTERN BRAZIL NEAR 4S42W.
ISOLATED AND DISORGANIZED MODERATE SHOWERS ARE SOUTH OF 4N
EAST OF 50W...AND EXTREME NORTHEASTERN BRAZIL.

...DISCUSSION...

THE GULF OF MEXICO...
AN UPPER LEVEL RIDGE IS ALONG 95W IN THE WESTERN GULF OF MEXICO.
ANTICYCLONIC FLOW IS EVERYWHERE. BROAD SURFACE ANTICYCLONIC FLOW 
COVERS THE AREA. 

THE CARIBBEAN SEA...
A COLD FRONT CONTINUES FROM 20N64W...THROUGH THE PASSAGE BETWEEN
THE U.S.A. VIRGIN ISLANDS AND PUERTO RICO...BETWEEN ARUBA AND 
CURACAO...TO THE PENINSULA DE PARAGUANA OF NORTHWESTERN 
VENEZUELA. A LARGE-SCALE UPPER LEVEL RIDGE IS BETWEEN 50W AND 
60W FROM NORTHERN SOUTH AMERICA BEYOND 32N. BROKEN TO OVERCAST
MULTILAYERED CLOUDS AND POSSIBLE PRECIPITATION ARE BETWEEN 60W
AND 70W. UPPER LEVEL SOUTHWESTERLY WIND FLOW MOVES FROM THE
EASTERN PACIFIC OCEAN AT LEAST 300 NM TO THE SOUTHWEST OF
COSTA RICA...ACROSS COSTA RICA AND SOUTHERN NICARAGUA...AND
BEYOND HISPANIOLA.

THE ATLANTIC OCEAN...
A WESTERN ATLANTIC OCEAN DEEP LAYER TROUGH SUPPORTS THE CURRENT 
COLD FRONT THAT PASSES THROUGH 32N56W TO 26N60W TO 20N64W AND 
BEYOND INTO THE CARIBBEAN SEA. POSSIBLE SHOWERS ARE WITHIN
120 NM TO 150 NM ON EITHER SIDE OF 25N60W BEYOND 32N54W.
BROAD SURFACE ANTICYCLONIC FLOW IS AROUND A 1032 MB EASTERN 
NORTH CAROLINA HIGH PRESSURE CENTER. BROAD SURFACE ANTICYCLONIC 
FLOW IS AROUND A 1041 MB HIGH PRESSURE CENTER NEAR 38N35W...
FROM THE ITCZ NORTHWARD...BETWEEN AFRICA AND THE COLD FRONT.
A MIDDLE TO UPPER LEVEL TROUGH IS ALONG 26N32W 17N35W TO 10N36W.

$$
MT