000
AGXX40 KNHC 210557
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
200 AM EDT WED APR 21 2010

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

WEAK TROUGH OVER THE NORTHERN GULF OF MEXICO FROM THE FLORIDA 
PANHANDLE 28N91W WILL DISSIPATE LATER TODAY. OTHERWISE WEAK PRES 
GRADIENT ACROSS THE AREA TODAY AND TONIGHT THEN HIGH PRES 
STRENGTHENS OVER THE EASTERN GULF THU AND SLY WINDS INCREASE 
OVER THE WESTERN GULF. THE HIGH MOVE E INTO THE ATLC AND 15-20 
KT WINDS ACROSS THE GULF W OF AROUND 87W BY FRI AND SPREAD 
ACROSS MOST OF THE GULF ON SAT AHEAD OF THE NEXT COLD FRONT 
WHICH WILL MOVE OFF THE TEXAS COAST SAT AFTERNOON AND EXTEND
FROM CENTRAL LOUISIANA COAST TO THE BAY OF CAMPECHE SAT EVENING  
THEN WEAKEN SUN.

WEAK RIDGE ACROSS THE ATLC WITH A WEAK GRADIENT ACROSS THE AREA 
RESULTING IN MOSTLY LIGHT WINDS. COLD FRONT WILL MOVE INTO THE 
FAR NW PORTION OF THE AREA EARLY TODAY AND EXTEND FROM 31N75W TO
THE NORTHERN BAHAMAS TONIGHT AND FROM 31N70W TO CENTRAL CUBA THU 
THEN MOVE RAPIDLY E OF THE AREA THU NIGHT. COULD SEE SOME 15-20 
KT SLY WINDS E OF THE FRONT. A WEAK HIGH PRES OVER THE NW 
PORTION OF THE AREA FRI WITH LIGHT WINDS ACROSS THE ENTIRE AREA 
WITH THESE CONDITIONS CONTINUING INTO SAT...THEN SLY WINDS 
INCREASE TO 20 KT OVER THE NW PORTION OF THE AREA SUN.

WEAK CARIBBEAN TROUGH AN FROM HAITI TO 12N77W WILL DISSIPATE 
LATER TODAY. MOSTLY LIGHT WINDS ACROSS THE AREA THROUGH THU THEN 
THE TRADES ONCE AGAIN INCREASE TO 15-20 KT OVER THE S CENTRAL 
CARIBBEAN FRI THROUGH SUN.

WARNINGS...
ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER DGS