000
AGXX40 KNHC 180745
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
350 AM EDT SUN SEP 18 2011

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

GULF OF MEXICO...
HIGH PRES BUILDS ACROSS REGION TODAY AND TIGHTEN PRES GRADIENT 
WITH WEAK TROUGH ENTERING YUCATAN PENINSULA TODAY.  FRESH NE 
BREEZE N OF 27N E OF 88W THROUGH TUE DIMINISH TO A LIGHT TO 
MODERATE E WIND BY WED.  SEAS REMAIN BELOW 5 FT THROUGHOUT.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
UPPER LEVEL DIVERGENCE CAUSED BY AN UPPER LEVEL CYCLONE JUST E 
OF PUERTO RICO ENHANCES CONVECTION ALONG WEAK SURFACE TROUGH 
OVER WINDWARD ISLANDS ALONG 61W WITH TROUGH AND ASSOCIATED 
WEATHER MOVING INTO EASTERN CARIBBEAN TODAY.  SURFACE TROUGH 
CONTINUES DRIFTING W WHILE UPPER LEVEL CYCLONE AND MOVES NE 
LATER TODAY DECOUPLING UPPER LEVEL SUPPORT.  HIGH PRES RIDGE 
OVER CENTRAL ATLC EXTEND SW ACROSS GREATER ANTILLES TODAY AND 
MON...ALLOWING E TRADES TO INCREASE ACROSS MOST OF TROPICAL N 
ATLC AND EASTERN CARIBBEAN ZONES.  WELL OUT E...LOW PRES CENTER 
1012 MB EMBEDDED WITHIN MONSOON TROUGH ACROSS CENTRAL ATLC NEAR 
10N35W DRIFT W AND APPROACH TROPICAL N ATLC LATE INTO FORECAST 
PERIOD. 

SW N ATLC S OF 31N W OF 55W...
DIFFUSING COLD FRONT IN FAR NW PART OF ZONE OFF NE FLORIDA  
DISSIPATE LATER TODAY WITH RIDGE BUILDING IN ITS WAKE.  PREVIOUS 
FRESH NE WINDS AND 7 FT SEAS IN NW CORNER GRADUALLY DIMINISH TO 
A MODERATE NE BREEZE AND SEAS LESS THAN 4 FT.  WEAK TROUGH FROM 
29N75W TO 24N77W DRIFT W ACROSS BAHAMAS TODAY AND REACH COAST OF 
FLORIDA MON. 

WARNINGS...

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA AND TROPICAL N ATLC...
.NONE.

SW N ATLC...
.NONE.
          
FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER WALLY BARNES