000
AGXX40 KNHC 210653
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
250 AM EDT MON APR 21 2008

MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND 
SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

GULF OF MEXICO...A WEAK COLD FRONT OVER THE SE WATERS WILL MOVE 
S OF AREA BY SUNSET TODAY. RETURN FLOW ALREADY OVER THE W WATERS 
AT 15 TO 20 KT PER BUOYS WILL CONTINUE AT MOSTLY 15 KT WITH 
SURGES TO 20 KT THROUGH FRI WHILE NE TO E FLOW OVER THE EASTERN 
WATERS IN WAKE OF THE FRONT WILL PERSIST THROUGH THU THEN BECOME 
E ON FRI. 

SW ATLC AND TROPICAL ATLC...PATTERN BECOMING COMPLICATED...A 
WEAK COLD FRONT LIES JUST OFF THE FL COAST IS STILL EXPECTED TO 
STALL N TO S ALONG 78W TODAY WILL LOW PRES DEVELOPING ALONG THE 
FRONT TONIGHT NEAR 30N78W. THE LOW IS EXPECTED TO MOVE S TO NEAR 
27N69W WED MORNING WITH BROAD LOW PRES DOMINATING THE LOW LEVELS 
W OF 60W THROUGH THU THEN THE LOW WILL MOVE ENE ALLOWING HIGH 
PRES TO BUILD IN FROM THE NE FRI. FURTHER S...A PERSISTENT AND 
BROAD FRONTAL TROUGH FROM 30N55W TO 22N65W ATTM IS STILL 
EXPECTED TO MEANDER IN THE SAME AREA TODAY. A STRONG UPPER 
TROUGH EXTENDS INTO THE AREA FROM 30N70W S ACROSS PUERTO RICO. 
UPPER DIFFLUENCE E OF THE THIS TROUGH IS ENHANCING CONVECTION 
ALONG THE FRONTAL TROUGH AND WILL SUPPORT LOW PRES  
DEVELOPMENT NEAR 29N55W LATER TODAY. THIS LOW WILL SHOOT OUT TO 
THE NE AND IN TURN MOVE ANY REMNANTS OF THE TROUGH SE OF 55W THU.

CARIBBEAN...A WEAK FRONTAL TROUGH WILL MOVE INTO THE NORTHERN 
WATERS OF THE TROPICAL ATLC ZONE AND GRADUALLY WASH OUT THROUGH 
WED. THE ATLC RIDGE WILL THEN SHIFT S AND LIE E TO W ALONG WED 
AND CONTINUE THROUGH FRI NIGHT. THIS WILL RELAX THE TRADES
ELSEWHERE.

WARNINGS...

ATLC...
NONE. 

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

.FORECASTER NELSON. TROPICAL PREDICTION CENTER.