Tropical Storm ISAAC

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TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER   6
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
1500 UTC WED AUG 22 2012
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
NONE.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MARTINIQUE
* DOMINICA
* GUADELOUPE AND THE SURROUNDING ISLANDS...AND ST. MARTIN
* ST. KITTS...NEVIS...ANTIGUA...BARBUDA...MONTSERRAT...AND ANGUILLA
* SABA...ST. EUSTATIUS...AND ST. MAARTEN
* BRITISH VIRGIN ISLANDS
* PUERTO RICO...VIEQUES...CULEBRA...AND THE U.S. VIRGIN ISLANDS
 
A HURRICANE WATCH IS IN EFFECT FOR...
* PUERTO RICO...VIEQUES...CULEBRA...AND THE U.S. AND BRITISH VIRGIN
ISLANDS
* SOUTH COAST OF DOMINICAN REPUBLIC FROM ISLA SAONA WESTWARD TO THE
HAITI-DOMINICAN REPUBLIC SOUTHERN BORDER
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* NORTH COAST OF DOMINICAN REPUBLIC FROM THE HAITI-DOMINICAN
REPUBLIC NORTHERN BORDER EASTWARD TO NORTH OF ISLA SAONA
 
A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
WITHIN THE WATCH AREA.  A WATCH IS TYPICALLY ISSUED 48 HOURS
BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE
WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR
DANGEROUS.
 
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.
 
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.
 
INTERESTS IN HAITI AND CUBA SHOULD MONITOR THE PROGRESS OF
ISAAC.
 
TROPICAL STORM CENTER LOCATED NEAR 15.9N  59.3W AT 22/1500Z
POSITION ACCURATE WITHIN  30 NM
 
PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT  18 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS  40 KT WITH GUSTS TO  50 KT.
34 KT....... 50NE  30SE   0SW  50NW.
12 FT SEAS..180NE  30SE   0SW  60NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.  RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
 
REPEAT...CENTER LOCATED NEAR 15.9N  59.3W AT 22/1500Z
AT 22/1200Z CENTER WAS LOCATED NEAR 15.9N  58.5W
 
FORECAST VALID 23/0000Z 16.3N  61.8W
MAX WIND  45 KT...GUSTS  55 KT.
34 KT... 50NE  30SE  20SW  50NW.
 
FORECAST VALID 23/1200Z 16.8N  64.8W
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 20NE   0SE   0SW  20NW.
34 KT... 60NE  40SE  30SW  60NW.
 
FORECAST VALID 24/0000Z 17.3N  67.8W
MAX WIND  60 KT...GUSTS  75 KT.
50 KT... 30NE  20SE   0SW  30NW.
34 KT... 70NE  50SE  40SW  70NW.
 
FORECAST VALID 24/1200Z 17.8N  70.3W
MAX WIND  75 KT...GUSTS  90 KT.
50 KT... 40NE  30SE  20SW  40NW.
34 KT... 90NE  60SE  40SW  90NW.
 
FORECAST VALID 25/1200Z 19.5N  74.5W
MAX WIND  60 KT...GUSTS  75 KT.
50 KT... 40NE  30SE  20SW  40NW.
34 KT...110NE  70SE  50SW 100NW.
 
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 175 NM
ON DAY 4 AND 225 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY
 
OUTLOOK VALID 26/1200Z 22.5N  78.5W
MAX WIND  60 KT...GUSTS  75 KT.
 
OUTLOOK VALID 27/1200Z 25.5N  81.5W
MAX WIND  70 KT...GUSTS  85 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.9N  59.3W
 
NEXT ADVISORY AT 22/2100Z
 
$$
FORECASTER BEVEN
 
 
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