637 
 WTNT24 KNHC 260242
 TCMAT4
  
 TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER  20
 NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
 0300 UTC SUN AUG 26 2012
  
 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
  
 THE TROPICAL STORM WATCH ALONG THE WEST COAST OF FLORIDA FROM BONITA
 BEACH TO TARPON SPRINGS HAS BEEN REPLACED WITH A TROPICAL STORM
 WARNING.
  
 THE TROPICAL STORM WATCH ALONG THE WEST COAST OF FLORIDA AND THE
 FLORIDA PANHANDLE HAS BEEN EXTENDED NORTHWARD AND WESTWARD TO INDIAN
 PASS.
  
 THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED FOR HAITI.
  
 SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
  
 A HURRICANE WARNING IS IN EFFECT FOR...
 * THE FLORIDA KEYS INCLUDING THE DRY TORTUGAS
 * THE WEST COAST OF FLORIDA FROM BONITA BEACH SOUTHWARD TO OCEAN
 REEF
 * FLORIDA BAY
  
 A HURRICANE WATCH IS IN EFFECT FOR...
 * THE FLORIDA EAST COAST FROM GOLDEN BEACH SOUTHWARD TO OCEAN REEF
 * ANDROS ISLAND IN THE BAHAMAS
  
 A TROPICAL STORM WARNING IS IN EFFECT FOR...
 * CUBAN PROVINCES OF CIEGO DE AVILA...SANCTI SPIRITUS...VILLA
 CLARA...CAMAGUEY...LAS TUNAS...GRANMA...HOLGUIN...SANTIAGO DE
 CUBA...AND GUANTANAMO
 * THE BAHAMAS
 * TURKS AND CAICOS ISLANDS
 * THE FLORIDA EAST COAST FROM SEBASTIAN INLET SOUTHWARD TO OCEAN
 REEF
 * LAKE OKEECHOBEE
 * THE FLORIDA WEST COAST FROM NORTH OF BONITA BEACH TO TARPON
 SPRINGS...INCLUDING TAMPA BAY
  
 A TROPICAL STORM WATCH IS IN EFFECT FOR...
 * CUBAN PROVINCES OF MATANZAS AND CIENFUEGOS
 * THE FLORIDA EAST COAST NORTH OF SEBASTIAN INLET TO FLAGLER BEACH
 * THE FLORIDA WEST COAST AND THE FLORIDA PANHANDLE NORTH OF TARPON
 SPRINGS TO INDIAN PASS
  
 A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
 SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE NEXT
 24 HOURS.  PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD
 BE RUSHED TO COMPLETION.
  
 A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
 WITHIN THE WATCH AREA...IN THIS CASE WITHIN THE NEXT 24 HOURS.
  
 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 THE REMAINDER OF CUBA...THE REMAINDER OF FLORIDA...AND
 ELSEWHERE ALONG THE NORTHERN GULF COAST SHOULD MONITOR THE PROGRESS
 OF ISAAC.  A HURRICANE WATCH MAY BE REQUIRED FOR A PORTION OF THE
 NORTHERN GULF COAST ON SUNDAY MORNING.
  
 TROPICAL STORM CENTER LOCATED NEAR 22.1N  77.2W AT 26/0300Z
 POSITION ACCURATE WITHIN  25 NM
  
 PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT  15 KT
  
 ESTIMATED MINIMUM CENTRAL PRESSURE  997 MB
 MAX SUSTAINED WINDS  50 KT WITH GUSTS TO  60 KT.
 50 KT....... 60NE   0SE   0SW   0NW.
 34 KT.......180NE 150SE   0SW 180NW.
 12 FT SEAS..250NE 180SE  15SW 180NW.
 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 22.1N  77.2W AT 26/0300Z
 AT 26/0000Z CENTER WAS LOCATED NEAR 21.7N  76.7W
  
 FORECAST VALID 26/1200Z 23.4N  79.4W
 MAX WIND  55 KT...GUSTS  65 KT.
 50 KT... 60NE  30SE   0SW   0NW.
 34 KT...180NE 150SE   0SW 180NW.
  
 FORECAST VALID 27/0000Z 24.6N  81.8W...NEAR FLORIDA KEYS
 MAX WIND  65 KT...GUSTS  80 KT.
 64 KT... 20NE  10SE   0SW  10NW.
 50 KT... 60NE  60SE  30SW  40NW.
 34 KT...180NE 150SE  60SW 180NW.
  
 FORECAST VALID 27/1200Z 25.8N  83.7W
 MAX WIND  75 KT...GUSTS  90 KT.
 64 KT... 30NE  20SE  10SW  20NW.
 50 KT... 60NE  60SE  40SW  50NW.
 34 KT...180NE 120SE  80SW 160NW.
  
 FORECAST VALID 28/0000Z 27.2N  85.2W
 MAX WIND  85 KT...GUSTS 105 KT.
 50 KT... 70NE  60SE  40SW  60NW.
 34 KT...180NE 120SE  90SW 160NW.
  
 FORECAST VALID 29/0000Z 29.5N  86.5W
 MAX WIND  90 KT...GUSTS 110 KT.
 50 KT... 80NE  60SE  50SW  70NW.
 34 KT...160NE 130SE 110SW 160NW.
  
 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 30/0000Z 31.5N  86.5W...INLAND
 MAX WIND  50 KT...GUSTS  60 KT.
  
 OUTLOOK VALID 31/0000Z 34.0N  86.0W...INLAND
 MAX WIND  25 KT...GUSTS  35 KT.
  
 REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.1N  77.2W
  
 NEXT ADVISORY AT 26/0900Z
  
 $$
 FORECASTER BROWN