000
AGXX40 KNHC 091850
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
230 PM EDT SUN OCT 09 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...
THERE IS A TIGHT PRESSURE GRADIENT OVER THE N GULF WATERS AS A 
RESULT OF STRONG HIGH PRES OVER THE NE UNITED STATES AND A 
TROUGH IN THE SE GULF. THIS GRADIENT IS MAINTAINING GALE FORCE 
WINDS OVER THE FAR N PART OF THE AREA E OF 90W. THESE WINDS WILL 
DECREASE BELOW GALE FORCE OVERNIGHT AND CONTINUE TO DIMINISH 
OVER THE NEXT COUPLE OF DAYS AS THE HIGH PRESSURE CONTINUES TO 
SHIFT NNE WEAKENING THE PRESSURE GRADIENT. LOW PRES IS EXPECTED 
TO MOVE INTO THE E GULF OF MEXICO WITHIN THE NEXT 24 TO 48 
HOURS...WITH A MEDIUM CHANCE OF BECOMING A SUBTROPICAL CYCLONE. 
THIS LOW IS THEN FORECAST TO MOVE NORTHWARD INTO THE SE UNITED 
STATES BY THE MIDDLE OF THE WEEK. 

SW N ATLC S OF 31N W OF 65W...
A LOW LEVEL TROUGH IS INTERACTING WITH AN UPPER LEVEL TROUGH TO 
CREATE ACTIVE WEATHER OVER THE WESTERN PART OF THE AREA. THERE 
IS A TIGHT PRESSURE GRADIENT BETWEEN THIS TROUGH AND HIGH 
PRESSURE OVER THE NE UNITED STATES WITH GALE FORCE WINDS N OF 
27N W OF 70W. THESE WINDS ARE EXPECTED TO DIMINISH BY MONDAY 
NIGHT AS THE HIGH PRESSURE SHIFTS FURTHER NE...WITH WINDS 
DECREASING THROUGH THE REMAINDER OF THE WEEK.

CARIBBEAN SEA AND TROPICAL N ATLC... 
A BROAD LOW LEVEL TROUGH S OF EASTERN CUBA IS THE RESULT OF 
ACTIVE WEATHER ASSOCIATED WITH AN UPPER LEVEL TROUGH. FRESH 
TO STRONG WINDS ARE FOUND TO THE E OF THE LOW LEVEL TROUGH 
BETWEEN 65W AND 75W. THE UPPER TROUGH WILL LIFT OUT OVER THE 
NEXT 24 HOURS...AND THE LOW LEVEL TROUGH WILL SLOWLY SHIFT 
WESTWARD...WITH WINDS DIMINISHING BELOW 20 KT. AFTERWORDS A WEAK 
PRESSURE PATTERN WITH LIGHT TO MODERATE WINDS WILL PREVAIL THE 
REMAINDER OF THE FORECAST PERIOD.

WARNINGS...
GULF OF MEXICO...
.GMZ084 AND GMZ086...GALE WARNING N OF 27N E OF 90W.

CARIBBEAN SEA...
.NONE.

TROPICAL N ATLC...
.NONE.

SW N ATLC...
.AMZ080...GALE WARNING N OF 27N W OF 70W...
          
FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

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FORECASTER AL