845 
 WTNT24 KNHC 220852
 TCMAT4
  
 TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER   5
 NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
 0900 UTC WED AUG 22 2012
  
 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
  
 THE GOVERNMENT OF THE DOMINICAN REPUBLIC HAS ISSUED A HURRICANE
 WATCH FOR THE SOUTH COAST OF DOMINICAN REPUBLIC FROM ISLA SAONA
 WESTWARD TO THE HAITI-DOMINICAN REPUBLIC SOUTHERN BORDER.
  
 THE GOVERNMENT OF THE DOMINICAN REPUBLIC HAS ISSUED A TROPICAL
 STORM WATCH FOR THE NORTH COAST OF DOMINICAN REPUBLIC FROM THE
 HAITI-DOMINICAN REPUBLIC NORTHERN BORDER EASTWARD TO NORTH OF
 ISLA SAONA.
  
 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. 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 15.5N  57.3W AT 22/0900Z
 POSITION ACCURATE WITHIN  20 NM
  
 PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT  16 KT
  
 ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB
 MAX SUSTAINED WINDS  40 KT WITH GUSTS TO  50 KT.
 34 KT....... 40NE  30SE   0SW   0NW.
 12 FT SEAS..120NE  30SE   0SW  30NW.
 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 15.5N  57.3W AT 22/0900Z
 AT 22/0600Z CENTER WAS LOCATED NEAR 15.5N  56.5W
  
 FORECAST VALID 22/1800Z 15.9N  59.7W
 MAX WIND  45 KT...GUSTS  55 KT.
 34 KT... 50NE  30SE  20SW  50NW.
  
 FORECAST VALID 23/0600Z 16.3N  62.8W
 MAX WIND  55 KT...GUSTS  65 KT.
 50 KT... 20NE   0SE   0SW  20NW.
 34 KT... 60NE  40SE  30SW  60NW.
  
 FORECAST VALID 23/1800Z 16.8N  65.7W
 MAX WIND  65 KT...GUSTS  80 KT.
 64 KT... 15NE  10SE   0SW  15NW.
 50 KT... 30NE  20SE   0SW  30NW.
 34 KT... 70NE  50SE  40SW  70NW.
  
 FORECAST VALID 24/0600Z 17.3N  68.4W
 MAX WIND  75 KT...GUSTS  90 KT.
 50 KT... 40NE  30SE  20SW  40NW.
 34 KT... 90NE  60SE  40SW  90NW.
  
 FORECAST VALID 25/0600Z 18.8N  73.2W...OVER WATER
 MAX WIND  65 KT...GUSTS  80 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 26/0600Z 21.8N  77.1W...OVER WATER
 MAX WIND  65 KT...GUSTS  80 KT.
  
 OUTLOOK VALID 27/0600Z 24.8N  80.0W
 MAX WIND  80 KT...GUSTS 100 KT.
  
 REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.5N  57.3W
  
 NEXT ADVISORY AT 22/1500Z
  
 $$
 FORECASTER STEWART