000
AXNT20 KNHC 251747
TWDAT 

TROPICAL WEATHER DISCUSSION...     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT FRI APR 25 2008

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...THE GULF OF MEXICO...THE CARIBBEAN SEA...NORTHERN 
SECTIONS OF SOUTH AMERICA...AND THE 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC.

...THE ITCZ...

7N12W 3N20W EQ30W...CROSSING THE EQUATOR AT 35W...AND INTO 
NORTHEASTERN BRAZIL NEAR 1S49W.  WIDELY SCATTERED MODERATE
SHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE WITHIN 90 TO 120 NM 
ON EITHER SIDE OF AXIS BETWEEN 14W AND 26W...AND BETWEEN 35W
AND 46W.

...DISCUSSION...

GULF OF MEXICO...

UPPER LEVEL RIDGE EXTENDS ACROSS THE LOWER MISSISSIPPI RIVER 
VALLEY SOUTHWESTWARD TO THE BAY OF CAMPECHE NEAR 19N95W.
A 1023 MB SURFACE HIGH PRESSURE CENTER IS OFF THE NORTHERN COAST 
OF NORTH CAROLINA. 10 TO 15 KT EAST-SOUTHEAST SURFACE WINDS ARE 
CURRENTLY OVER THE GULF OF MEXICO. LINGERING MIDDLE AND UPPER 
LEVEL CLOUDINESS REMAIN ALONG THE LOUISIANA COAST PROVIDING 
SCATTERED SHOWERS FROM 27N TO 30N BETWEEN 88W AND 92W IN THE 
GULF OF MEXICO. ELSEWHERE MOSTLY CLEAR SKIES DOMINATE THE GULF 
OF MEXICO PROVIDING FAIR WEATHER CONDITIONS.

CARIBBEAN SEA...

BROAD SCALE UPPER LEVEL CYCLONIC FLOW COVERS THE AREA WEST OF
A LINE THROUGH 20N61W 14N70W 11N76W. THIS FLOW IS ASSOCIATED
WITH THE TROUGH FROM 24 HOURS AGO THAT STRETCHES FROM THE 
ATLANTIC OCEAN TO THE NORTHEASTERN CARIBBEAN SEA TO 12N78W IN 
THE SOUTHWESTERN CORNER OF THE AREA. THE REST OF THE AREA IS 
DOMINATED BY THE WESTERN EXTENT OF A LARGE UPPER LEVEL HIGH 
ANTICYCLONIC CIRCULATION CENTER IN THE ATLANTIC NEAR 8N48W 
PRODUCING SOUTHWESTERLY FLOW EAST OF 70W. SCATTERED SHOWER 
ACTIVITY WILL REMAIN ACROSS PUERTO RICO AND THE LEEWARD ISLANDS 
DURING THE NEXT 24 HOURS. STRONG SUBSIDENCE/DRY AIR COVERS THE 
WESTERN CARIBBEAN SEA WEST OF THE 20N61W 11N76W LINE. FAIR 
WEATHER CONDITIONS WILL PERSIST DURING THE NEXT 24 HOURS. 

ATLANTIC OCEAN...

A DEEP LAYERED TROUGH PASSES THROUGH 32N64W A BIT EAST OF 
BERMUDA TO 26N66W BEYOND 20N67W...LEADING INTO THE CARIBBEAN 
SEA. BROAD LOW PRESSURE AT THE SURFACE IS CHARACTERIZED BY
A TROUGH FROM A 1010 MB LOW PRESSURE CENTER NEAR 30N56W TO
A 1011 MB LOW PRESSURE CENTER NEAR 28N61W TO 21N67W. 
A 1014 MB LOW PRESSURE CENTER ALSO IS NEAR 23N72W JUST NORTH
OF THE SOUTHERN BAHAMAS. SCATTERED MODERATE SHOWERS ARE FROM 21N 
TO 32N BETWEEN 50W AND 62W. THE INDIVIDUAL LOW PRESSURE CENTERS
WILL CONTINUE TO MOVE NORTH-NORTHEAST OF THE AREA AND BECOME 
ABSORBED INTO LARGER SCALE CYCLONIC FLOW TO THE NORTH. THE 
REMAINDER OF THE ATLANTIC EAST OF 50W IS DOMINATED BY AN UPPER 
LEVEL RIDGE AND ASSOCIATED SURFACE RIDGE. THE SURFACE RIDGE IS 
ALONG 30N28W 21N40W TO 12N52W. THE FORECAST IS FOR MODERATE TO 
FRESH TRADEWIND SURFACE FLOW TO THE EAST OF THE 30N28W 12N52W 
RIDGE FOR THE NEXT 24 HOURS.

$$
HUFFMAN/MT
HUFFMAN/MT