000
AXNT20 KNHC 250518
TWDAT 

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

...THE ITCZ...

ITCZ AXIS IS CENTERED ALONG 4N8W 3N20W 2N30W EQ50W.  CLUSTERS OF 
SCATTERED MODERATE/STRONG CONVECTION ARE FROM EQ-4N BETWEEN 
9W-13W...AND FROM 6N-8N BETWEEN 11W-15W.  SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS FROM 4N-6N BETWEEN 16W-23W.  
ISOLATED MODERATE CONVECTION IS FROM 3S-1N BETWEEN 33W-40W.  

...DISCUSSION...

GULF OF MEXICO...
A 1021 MB HIGH IS CENTERED OFF THE COAST OF NORTH CAROLINA NEAR 
36N75W.  A SURFACE RIDGE AXIS EXTENDS SW TO THE BAY OF CAMPECHE 
NEAR 21N97W.  10-15 KT SURFACE WINDS ARE NOTED OVER THE GULF OF 
MEXICO.  MOSTLY CLEAR SKIES DOMINATES THE  CENTRAL GULF.  BROKEN 
TO OVERCAST MULTILAYERED CLOUDS WITH SCATTERED SHOWERS ARE OVER 
TEXAS...MEXICO...AND THE W GULF W OF 94W.  SCATTERED TO BROKEN 
HIGH CLOUDS ARE OVER FLORIDA AND THE NE GULF E OF 84W.  IN THE 
UPPER LEVELS...A RIDGE IS OVER THE GULF WITH AXIS ALONG 95W 
PRODUCING MOSTLY NWLY FLOW.  SIGNIFICANT UPPER LEVEL MOISTURE IS 
OVER THE N GULF N OF 24N.  STRONG SUBSIDENCE IS OVER THE 
REMAINDER OF THE GULF.  EXPECT... SELY SURFACE RETURN FLOW WITH 
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS OVER THE W GULF W 
OF 90W DURING THE NEXT 24 HOURS. 
 
CARIBBEAN SEA...
MODERATE TO FRESH TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH 
MOSTLY FAIR WEATHER.  SCATTERED SHOWERS ARE N OF PUERTO RICO 
FROM 19N-21N BETWEEN 64W-69W.  A 1005 MB LOW IS INLAND OVER N 
COLOMBIA NEAR 6N72W.  SCATTERED MODERATE TO STRONG CONVECTION IS 
N OF THE LOW CENTER FROM 6N-11N BETWEEN 70W-76W.  SCATTERED 
MODERATE CONVECTION IS ALSO INLAND OVER NE VENZUELA FROM 5N-10N 
BETWEEN 62W-65W.  IN THE UPPER LEVELS THE NW CARIBBEAN SEA HAS A 
TROUGH N OF 10N AND W OF 70W.  THE E CARIBBEAN IS DOMINATED BY 
THE WRN EXTENT OF A LARGE UPPER LEVEL HIGH CENTERED IN THE 
ATLANTIC NEAR 9N52W PRODUCING SWLY FLOW E OF 70W.  STRONG 
SUBSIDENCE COVERS THE W CARIBBEAN W OF 70W WHILE SIGNIFICANT 
MOISTURE IS OVER NRN SOUTH AMERICA AND THE E CARIBBEAN E OF 
70W.  EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS OVER 
THE S CARIBBEAN S OF 13N DURING THE NEXT 24 HOURS.

ATLANTIC OCEAN...
A DEEP LAYERED LOW IS OVER THE W ATLANTIC WITH A 1009 MB SURFACE 
LOW NEAR 28N66W AND AN UPPER LEVEL CENTER NEAR 29N65W.  A 
SURFACE TROUGH EXTENDS S TO HISPANIOLA NEAR 20N70W.  WIDELY 
SCATTERED MODERATE CONVECTION IS N OF THE UPPER LOW CENTER FROM 
28N-31N BETWEEN 60W-65W.  ANOTHER 1012 MB LOW IS OVER THE W 
ATLANTIC NEAR 25N72W.  A SURFACE TROUGH IS OVER THE CENTRAL 
ATLANTIC ALONG 32N34W 25N43W.  SCATTERED SHOWERS ARE WITHIN 60 
NM E OF THE TROUGH.  A SURFACE RIDGE AXIS EXTENDS FROM NW SPAIN 
SW TO 28N32W.  EXPECT ALL THE SURFACE LOWS AND TROUGHS IN THE 
ATLANTIC TO SHIFT E OVER THE NEXT 24 HOURS WITH LIGHT 
CONVECTION. 

$$
FORMOSA