000
AGXX40 KNHC 240604
MIMATS

MARINE WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
230 PM EDT MON AUG 23 2010

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

WEAK TROUGH IN THE EASTERN AND MIDDLE GULF OF MEXICO FROM THE 
FLORIDA BIG BEND TO 26N92W. THE TROUGH WILL EXTEND FROM THE 
FLORIDA PANHANDLE TO S TEXAS TUE THEN DRIFT SLOWLY W THU. 
HOWEVER THE PRES PATTERN ACROSS THE GULF OF MEXICO IS VERY WEAK 
WITH MOSTLY LIGHT WINDS ACROSS MUCH OF THE AREA. BUOYS INDICATE 
5-10 KT WINDS ACROSS THE GULF AND THESE CONDITIONS SHOULD 
PERSIST THROUGH THU. WINDS WILL INCREASE TO 15 KT OVER THE SW 
GULF AS LOWER PRES IS FORECAST TO DEVELOP IN THE BAY OF CAMPECHE 
TIGHTENING THE GRADIENT LATE THU THROUGH SAT.

ATLC RIDGE WILL CONTINUE ALONG 27N THROUGH THE FORECAST PERIOD. 
AS LOW PRES APPROACHING THE SE U.S. WILL TIGHTEN THE PRES 
GRADIENT WITH SW WINDS INCREASING TO 20 KT ACROSS THE NW PORTION 
OF THE AREA THROUGH EARLY WED THEN DECREASE TO BELOW 20 KT AS 
THE LOW AND ASSOCIATED TROUGH MOVE TO THE NE AND THE RIDGE 
WEAKENS. OTHERWISE...A WEAK PRES PATTERN WILL PREVAIL ACROSS THE 
REMAINDER OF THE AREA WITH MODERATE WINDS THROUGH FRI. DANIELLE 
WILL MOVE E OF THE AREA THU AND FRI...WITH ASSOCIATED ELY SWELLS 
BUILDING OVER THE FAR E PORTION OF THE AREA. THE SWELLS MAY 
INCREASE TO 11 FT ON SAT.

TRADES IN THE 15-20 KT RANGE ACROSS THE NW CARIBBEAN S OF 18N 
AND W OF 85W WILL DECREASE TO BELOW 20 KT THIS AFTERNOON. ELY 
TRADES OF 15-20 KT WILL CONTINUE OVER MUCH OF THE CENTRAL 
CARIBBEAN. THESE CONDITIONS WILL CONTINUE THROUGH WED NIGHT THEN 
DECREASE THU AND FRI AS THE ATLC RIDGE WEAKENS AND THE PRES 
GRADIENT DECREASES. WINDS ARE EXPECTED TO INCREASE OVER THE NE 
PORTION OF TROPICAL N ATLC WED THROUGH FRI ALONG WITH BUILDING 
SEAS IN NE TO E SWELLS AS DANIELLE PASSES JUST E OF THE AREA.
WINDS AND SEAS DECREASE SAT.

WARNINGS...

SW N ATLC...
.NONE.

CARIBBEAN...
.NONE.

.GULF OF MEXICO...
.NONE.

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

$$
FORECASTER DGS