000
AGXX40 KNHC 221543
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
1145 AM EDT MON AUG 22 2011

EARLY RELEASE TO UPDATE WARNINGS

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...
HARVEY DOWNGRADED TO REMNANT LOW WELL INLAND WITH SMALL AREA 
15-20 KT WINDS...SEAS TO 7 FT...OVER W BAY OF CAMPECHE THIS 
MORNING AND EXPECTED TO DIMINISH THIS AFTERNOON. RIDGE STILL 
MEANDERING OVER THE N WATERS WITH A WEAK TROUGH EXPECTED TO 
STALL OVER THE EXTREME NE WATERS TUE...THUS VARIABLE 5-10 KT N 
OF 28N THROUGH WED. HURCN IRENE PULLING N OF THE CARIBBEAN AND
ITS LIMITING LAND EFFECTS...AND NOW FORECAST TO WIND UP...BUT 
ITS CENTER PASSING E OF FL RESULTING IN NO TS WARNING FOR E 
GULF. NOTE THAT SMALL TRACK FLUCTUATIONS...OR INCREASE IN RADIUS 
TS FORCE OVER ITS W SEMICIRCLE...COULD POST TS WARNING FOR FL 
STRAITS AGAIN. STILL EXPECT GRADIENT TO RESULT IN BACKING 15-25 
KT WINDS FROM NE-N-NW WED THROUGH FRI...THEN BACKING W-SW FRI 
NIGHT INTO SAT OVER WATERS...WITH THESE CONDITIONS AFFECTING 
GULF WATERS E OF 87W.
   
SW ATLC S OF 31N W OF 55W...CARIBBEAN SEA AND TROPICAL N ATLC S 
OF 22N W OF 55W...

HURCN IRENE PULLING N AWAY FROM PUERTO RICO. NEW NHC GUIDANCE 
INTENSIFIES IRENE AND TRACKS CENTER E OF FL COAST TO SC COAST 
SAT MORNING. ADJUSTED 12 FT SEAS RADII FOR 15Z ADVISORY BASED ON 
A JASON ALTIMETER PASS. EXPANDED WIND RADII AND INCREASED SEAS 
IN TEXT PACKAGE AND SIMPLIFIED WARNING HEADLINES. TS WARNING FOR 
CARIBBEAN N OF 18N BETWEEN 60W-70W WILL EXPIRE LATE TONIGHT.    
LAST TS RADII REMAINS JUST N OF WINDWARD PASSAGE TUE NIGHT. BY 
MID WEEK ENTIRE SW ATLC ZONE AT LEAST 20 KT WITH SEAS GREATER 
THAN 8 FT ALL ATLC WATERS W OF 68W. SOUTHERLY WINDS TO 20 KT 
WILL DIMINISH TROPICAL WATERS N OF VIRGIN ISLANDS TUE...BUT WILL 
PERSIST OVER N-CENTRAL CARIBBEAN THROUGH THU NIGHT.   
REFER TO WTNT24 KNHC/MIATCMAT4 FOR LATEST INFORMATION ON IRENE. 
  
WARNINGS...

GULF OF MEXICO...
.NONE.

CARIBBEAN AND TROPICAL N ATLC...
.AMZ086...TS WRNG N OF 18N BETWEEN 65W-70W THROUGH TONIGHT.

SW N ATLC...
.AMZ080...HURCN WRNG S OF 23N E OF 75W.
          
          INFO...TS AND HURCN CONDS EXPECTED W OF 69W TUE NIGHT 
          THRU FRI.

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

$$
FORECASTER NELSON