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000 WTNT34 KNHC 240250 TCPAT4 BULLETIN TROPICAL STORM ISAAC ADVISORY NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092012 1100 PM AST THU AUG 23 2012 ...ISAAC EXPECTED TO BE NEAR OR OVER HISPANIOLA TOMORROW ALONG WITH HEAVY RAINS AND FLOODING... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...16.7N 68.7W ABOUT 145 MI...235 KM SSE OF SANTO DOMINGO DOMINICAN REPUBLIC MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... THE HURRICANE WARNING FOR HAITI HAS BEEN CHANGED TO A TROPICAL STORM WARNING AND A HURRICANE WATCH. THE GOVERNMENT OF CUBA HAS ISSUED A TROPICAL STORM WARNING FOR THE CUBAN PROVINCES OF CAMAGUEY...LAS TUNAS...GRANMA...HOLGUIN... SANTIAGO DE CUBA...AND GUANTANAMO. THE GOVERNMENT OF CUBA HAS ISSUED A TROPICAL STORM WATCH FOR THE CUBAN PROVINCES OF CIEGO DE AVILA...SANCTI SPIRITUS...AND VILLA CLARA. THE TROPICAL STORM WARNINGS FOR PUERTO RICO...VIEQUES...CULEBRA... AND THE U.S. VIRGIN ISLANDS HAVE BEEN DISCONTINUED. THE GOVERNMENT OF ANTIGUA AND BARBUDA HAS DISCONTINUED THE TROPICAL STORM WARNING FOR THE BRITISH VIRGIN ISLANDS. THE GOVERNMENT OF THE BAHAMAS HAS ISSUED A TROPICAL STORM WATCH FOR ANDROS ISLAND AND THE CENTRAL BAHAMAS INCLUDING CAT ISLAND...THE EXUMAS...LONG ISLAND...RUM CAY...AND SAN SALVADOR. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WATCH IS IN EFFECT FOR... * HAITI A TROPICAL STORM WARNING IS IN EFFECT FOR... * DOMINICAN REPUBLIC * HAITI * CUBAN PROVINCES OF CAMAGUEY...LAS TUNAS...GRANMA...HOLGUIN... SANTIAGO DE CUBA...AND GUANTANAMO * SOUTHEASTERN BAHAMAS INCLUDING THE ACKLINS...CROOKED ISLAND...LONG CAY...THE INAGUAS...MAYAGUANA...AND THE RAGGED ISLANDS * TURKS AND CAICOS ISLANDS A TROPICAL STORM WATCH IS IN EFFECT FOR... * CUBAN PROVINCES OF CIEGO DE AVILA...SANCTI SPIRITUS...AND VILLA CLARA * ANDROS ISLAND AND THE CENTRAL BAHAMAS INCLUDING CAT ISLAND...THE EXUMAS...LONG ISLAND...RUM CAY...AND SAN SALVADOR A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN THE NEXT 24 TO 36 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 JAMAICA...THE REMAINDER OF CUBA...THE REMAINDER OF THE BAHAMAS...SOUTH FLORIDA...AND THE FLORIDA KEYS SHOULD MONITOR THE PROGRESS OF ISAAC. FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES... INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1100 PM AST...0300 UTC...THE CENTER OF TROPICAL STORM ISAAC WAS LOCATED NEAR LATITUDE 16.7 NORTH...LONGITUDE 68.7 WEST. ISAAC IS MOVING TOWARD THE WEST-NORTHWEST NEAR 18 MPH...30 KM/H...AND A WEST-NORTHWEST TO NORTHWEST MOTION AT A SLIGHTLY SLOWER FORWARD SPEED IS EXPECTED OVER THE NEXT COUPLE OF DAYS. ON THE FORECAST TRACK...THE CENTER OF ISAAC WILL BE NEAR OR OVER HISPANIOLA ON FRIDAY...AND MOVE NEAR OR OVER SOUTHEASTERN CUBA ON SATURDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH...75 KM/H...WITH HIGHER GUSTS. SOME STRENGTHENING IS FORECAST WHILE THE CENTER REMAINS OVER WATER. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 185 MILES...295 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1001 MB...29.56 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS ARE EXPECTED OVER PORTIONS OF THE DOMINICAN REPUBLIC AND HAITI ON FRIDAY...WITH HURRICANE CONDITIONS POSSIBLE OVER PORTIONS OF HAITI. TROPICAL STORM CONDITIONS ARE EXPECTED OVER THE SOUTHEASTERN BAHAMAS AND THE TURKS AND CAICOS ISLANDS BY LATE FRIDAY. TROPICAL STORM CONDITIONS ARE EXPECTED OVER EASTERN CUBA BY LATE FRIDAY OR EARLY SATURDAY. TROPICAL STORM CONDITIONS ARE POSSIBLE OVER CENTRAL CUBA...THE CENTRAL BAHAMAS... AND ANDROS ISLAND BY SATURDAY. RAINFALL...TOTAL RAINFALL ACCUMULATIONS OF 8 TO 12 INCHES...WITH MAXIMUM AMOUNTS OF 20 INCHES...ARE POSSIBLE OVER HISPANIOLA. THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES. TOTAL RAIN ACCUMULATIONS OF 2 TO 4 INCHES...WITH MAXIMUM AMOUNTS OF 6 INCHES OVER HIGHER TERRAIN...ARE POSSIBLE OVER PUERTO RICO AND THE VIRGIN ISLANDS. TOTAL RAIN ACCUMULATIONS OF 2 TO 4 INCHES ARE POSSIBLE OVER THE SOUTHEASTERN BAHAMAS. STORM SURGE...A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 2 TO 4 FEET ABOVE NORMAL TIDE LEVELS IN AREAS OF ONSHORE WINDS ALONG THE COAST OF HISPANIOLA. NEAR THE COAST...THE SURGE WILL BE ACCOMPANIED BY DANGEROUS WAVES. A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 1 TO 3 FEET ABOVE NORMAL TIDE LEVELS IN AREAS OF ONSHORE WINDS ALONG THE COAST WITHIN THE REMAINING TROPICAL STORM WARNING AREA. SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL AFFECT THE LEEWARD ISLANDS...VIRGIN ISLANDS...PUERTO RICO...HISPANIOLA...THE SOUTHEASTERN BAHAMAS...AND THE TURKS AND CAICOS DURING THE NEXT COUPLE OF DAYS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE FOR MORE INFORMATION. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...200 AM AST. NEXT COMPLETE ADVISORY...500 AM AST. $$ FORECASTER PASCH
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