000
AGXX40 KNHC 201820
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 PM EDT TUE SEP 20 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...
WEAK HIGH PRES BUILDING OVER NORTHERN GULF WITH LIGHT WINDS 
GENERALLY 10 KT OR LESS...SEAS 3 FT OR LESS ACROSS MOST OF BASIN 
THROUGH SUN. WEAK COLD FRONT WILL MOVE THROUGH THE NE GULF FRI
THEN STALL ALONG THE W COAST OF FLORIDA OVER THE WEEKEND.

SW N ATLC S OF 31N W OF 55W...
HIGH PRES RIDGE ALONG 31N. ELY WINDS AROUND 15 KT ACROSS THE 
AREA THROUGH THU. E WINDS INCREASE TO 20 KT ACROSS THE FAR SE 
PORTION OF THE AREA AS A LOW CURRENTLY WELL E OF THE AREA MOVES 
CLOSER TO THE FORECAST AREA. THE LOW MOVES INTO THE EASTERN 
CARIBBEAN SUN AND WINDS S OF AROUND 24N E OF 69W INCREASE TO 
20-25 KT AND SEAS BUILD 8-10 FT SUN.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
LOW PRES IN CENTRAL ATLC AT 12N38W EXPECTED TO STRENGTHEN AS IT 
MOVE W THROUGH WED POSSIBLY BECOMING A TROPICAL CYCLONE. THE LOW 
PRES CENTER REACH TROPICAL N ATLC FRI AND MOVE INTO ERN 
CARIBBEAN LATE SAT INTO SUN. MODEL GUIDANCE IN FAIRLY GOOD 
AGREEMENT CONCERNING ITS WESTWARD TRACK WITH THE LOW SE OF 
PUERTO RICO SUN. ASSOCIATED WINDS AND SEAS APPROACH TROPICAL 
STORM FORCE MAINLY IN ITS NRN SEMICIRCLE SINCE EARLY WED.
WINDS INCREASE TO 20-25 KT IN THE TROPICAL ATLC ZONE THU WITH 
SEAS BUILDING 8-12 FT. AS THE LOW...POSSIBLE TROPICAL CYCLONE 
APPROACHES THE AREA FRI WINDS INCREASE TO AT LEAST 25-30 KT AND 
SEA 10-15 FT.

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

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FORECASTER DGS