000
AGXX40 KNHC 221805
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 PM EDT WED AUG 22 2012

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...
SURFACE TROUGH FROM THE FLORIDA PANHANDLE TO 27N90W WILL 
WILL NOT MOVE MUCH DURING THE NEXT FEW DAYS. A MID TO UPPER 
LEVEL TROUGH SUPPORTING THIS FEATURE CONTINUES TO PUMP UP 
PLENTIFUL MOISTURE AND UNSTABLE CONDITIONS ACROSS THE MAJORITY 
OF THE GULF WITH SCATTERED SHOWERS AND ISOLATED TSTMS FOUND IN 
ALMOST EVERY ZONE. EXPECT THESE CONDITIONS TO PERSIST THROUGH AT 
LEAST THU. ANOTHER TROUGH REMAINS RIGHT ALONG THE E COAST OF 
MEXICO WITH ADDITIONAL CONVECTION CONCENTRATED THERE. NO 
DEVELOPMENT OF THIS TROUGH IS EXPECTED THROUGH THU. A TROPICAL 
WAVE WILL EMERGE OFF OF THE YUCATAN PENINSULA LATER THIS MORNING 
MARCHING ACROSS THE SW GULF THROUGH THU. OTHERWISE A WEAK 
EXTENSION OF ATLC RIDGING STRETCHES FROM NEAR TAMPA BAY FLORIDA 
TO 25N89W. LATEST NHC ADVISORY BRINGS ISAAC TO NEAR THE SW 
FLORIDA COAST AS A HURRICANE NEAR 25.5N 81.5W MON.

SOUTHWEST NORTH ATLC S OF 31N W OF 65W...
ATLC HIGH PRES IS CENTERED JUST S OF BERMUDA WITH A RIDGE AXIS 
STRETCHING WESTWARD TO CENTRAL FLORIDA. WINDS WILL INCREASE 
ACROSS THE SE PORTION OF THE AREA THU AS TROPICAL STORM ISAAC 
MOVES S OF THE AREA OVER THE CARIBBEAN. NWW3 HAS SEAS BUILDING 
TO 17 FT N OF HISPANIOLA AND SPREAD W AS THE STORM MOVES W.
ISAAC IS FORECAST TO INCREASE TO HURRICANE FORCE FRI JUST S OF 
HISPANIOLA.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
TROPICAL STORM ISAAC CENTERED NEAR 15.8N 60.8W AT 2 PM EDT WITH 
MAXIMUM SUSTAINED WINDS OF 40 KT GUSTS TO 60 KT. THE MINIMUM 
CENTRAL PRESSURE WAS 1006 MB MOVING TO THE W AT 18 KT. 
CONVECTION CONTINUES TO GRADUALLY BECOME BETTER ORGANIZED NEAR 
THE CENTER WITH THE OUTER BANDS OF ISAAC NOW IMPACTING THE E 
CARIBBEAN ISLANDS. DETERIORATING CONDITIONS WILL CONTINUE 
TO SPREAD WESTWARD TOWARD THE VIRGIN ISLANDS AND PUERTO RICO 
THU...THEN TO THE DOMINICAN REPUBLIC BY FRI. THE HIGHEST SEAS 
WILL REMAIN ON THE N-NE SIDE OF THE STORM OUTSIDE OF THE 
IMMEDIATE CARIBBEAN...WITH LARGE SWELLS IMPACTING THE NE-E 
FACING SIDES OF THE ISLANDS. ISAAC IS CURRENTLY FORECAST TO 
STRENGTHEN TO A HURRICANE FRI JUST S-SW OF DOMINICAN REPUBLIC 
THEN IT WILL MOVE OVER THE S CENTRAL TIP OF HISPANIOLA FRI AND 
INTO EASTERN CUBA SAT.

NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA...
.TROPICAL STORM WARNING...AMZ023-025-027.

NONE.

SW N ATLANTIC...
.NONE.
  
FOR ADDITIONAL INFORMATION PLEASE VISIT
WWW.HURRICANES.GOV/MARINE

$$
FORECASTER DGS