000
AGXX40 KNHC 121833
MIMATS

MARINE WEATHER DISCUSSION        
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
245 PM EDT SUN SEP 12 2010

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

GULF OF MEXICO...
A WEAK RIDGE DOMINATES THE GULF OF MEXICO WITH MAINLY E TO SE 
WINDS OF AROUND 10 KT AND SEAS LESS THAN 3 FT. ASCAT PASS FROM 
1556 UTC AND BUOY OBSERVATIONS CORROBORATED THESE WIND SPEEDS. A 
COLD FRONT WILL CLIP THE FAR N WATERS LATE TODAY INTO MON. NE 
WINDS OF 10 TO 15 KT ARE EXPECTED TO BLOW BEHIND THE FRONT. HIGH 
PRES IN THE WAKE OF THE FRONT WILL MOVE FROM THE SOUTHERN U.S. 
PLAINS TO THE SE CONUS RESULTING IN AN INCREASE IN WINDS...15 TO 
20 KT...AND SEAS...4 TO 6 FT...MAINLY ACROSS THE EASTERN HALF OF 
THE GULF WATERS WED AND THU. A WEAK SURFACE TROUGH WILL LINGER 
OVER THE FAR SW GULF THROUGH WED WITH WINDS IN THE 10 TO 15 KT 
RANGE AND SEAS OF UP TO 4 FT. SCATTERED SHOWERS AND TSTMS ARE 
ASSOCIATED WITH THIS TROUGH. A LOW PRES SYSTEM IN THE EASTERN 
CARIBBEAN WILL MOVE INTO THE NW CARIBBEAN LATE WED AND THU... 
POSSIBLY AS A TROPICAL CYCLONE...INCREASING WINDS AND SEAS IN 
THE FAR SOUTHERN GULF. HIGH PRES WILL DOMINATE THE REMAINDER OF 
THE GULF THROUGH THU.

SW N ATLC...
A DISSIPATING COLD FRONT EXTENDING FROM 28N65W TO 26N76W WILL 
BECOME DIFFUSE TONIGHT. ANOTHER COLD FRONT WILL ENTER THE FAR NW 
PORTION TONIGHT. WINDS ARE FORECAST TO SHIFT TO THE NW BEHIND 
THE FRONT BUT WILL REMAIN LIGHT. A BELT OF ELY WINDS IN THE 10 
TO 15 KT RANGE WILL PERSIST S OF 25N WITH SEAS OF 4 TO 5 FT E OF 
THE BAHAMAS. WINDS AND SEAS WILL GRADUALLY INCREASE OVER THE E 
PORTION OF THE AREA LATE IN THE FORECAST PERIOD THU AS MAJOR 
HURRICANE IGOR PASS TO THE E OF THE AREA...HOWEVER TROPICAL 
STORM FORCE WINDS SHOULD REMAIN E OF THE FORECAST REGION.

CARIBBEAN SEA AND TROPICAL N ATLC...
THE REMNANT TROUGH OF GASTON IS OVER THE GULF OF HONDURAS AND 
NICARAGUA MOVING W. SHOWERS AND THUNDERSTORMS REMAIN 
DISORGANIZED IN ASSOCIATION WITH A BROAD AREA OF LOW PRESSURE 
LOW PRESSURE LOCATED NEAR 16N71W. ENVIRONMENTAL CONDITIONS STILL 
APPEAR FAVORABLE FOR GRADUAL DEVELOPMENT OF THIS SYSTEM...AND A 
TROPICAL DEPRESSION COULD FORM DURING THE NEXT COUPLE OF DAYS AS 
IT MOVES WESTWARD AT 10 TO 15 MPH. THERE IS A MEDIUM CHANCE OF 
THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS.
THIS BROAD AREA OF LOW PRES IS FORECAST TO MOVE TO NEAR 
16.5N75.5W MON MORNING...NEAR 17.5N80.5W TUE MORNING...AND NEAR 
18.5N85W WED MORNING.

HURRICANE IGOR HAS RAPIDLY INTENSIFIED INTO A CATEGORY FOUR 
HURRICANE EARLY THIS AFTERNOON...AND IS FORECAST TO APPROACH THE 
FAR E TROPICAL N ATLC WATERS LATE TUE INTO WED AS A MAJOR 
HURRICANE. SO WILL CONTINUE TO HEADLINE HURRICANE CONDITIONS ARE 
EXPECTED OVER THE NE PORTION OF THE TROPICAL N ATLC N OF 19N AND 
E OF 60W.
 
WARNINGS...

SW N ATLC...
.NONE.

CARIBBEAN...
.NONE.

TROPICAL N ATLC...
.HURRICANE CONDITIONS EXPECTED N OF 19N E OF 60W TUE NIGHT AND 
WED.
  
GULF OF MEXICO...
.NONE. 

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

$$
FORECASTER GR