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Hurricane Maria Forecast Advisory Number 9
2017-09-18 16:56:43| National Hurricane Center (Atlantic)
Issued at 1500 UTC MON SEP 18 2017 000 WTNT25 KNHC 181456 TCMAT5 HURRICANE MARIA FORECAST/ADVISORY NUMBER 9 NWS NATIONAL HURRICANE CENTER MIAMI FL AL152017 1500 UTC MON SEP 18 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A HURRICANE WARNING IS NOW IN EFFECT FOR THE U. S. VIRGIN ISLANDS. THE METEOROLOGICAL SERVICE OF ANTIGUA HAS ISSUED A HURRICANE WARNING FOR THE BRITISH VIRGIN ISLANDS...AND A TROPICAL STORM WARNING FOR ANGUILLA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WARNING IS IN EFFECT FOR... * GUADELOUPE * DOMINICA * ST. KITTS...NEVIS...AND MONTSERRAT * MARTINIQUE * ST. LUCIA * U.S. VIRGIN ISLANDS * BRITISH VIRGIN ISLANDS A TROPICAL STORM WARNING IS IN EFFECT FOR... * ANTIGUA AND BARBUDA * SABA AND ST. EUSTATIUS * ST. MAARTEN * ANGUILLA A HURRICANE WATCH IS IN EFFECT FOR... * PUERTO RICO...VIEQUES...AND CULEBRA * SABA AND ST. EUSTATIUS * ST. MAARTEN * ST. MARTIN AND ST. BARTHELEMY * ANGUILLA A TROPICAL STORM WATCH IS IN EFFECT FOR... * BARBADOS * ST. VINCENT AND THE GRENADINES A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. 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 WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE IN THE LESSER ANTILLES AND THE DOMINICAN REPUBLIC SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. HURRICANE WARNINGS WILL LIKELY BE ISSUED FOR PUERTO RICO AND THE NEARBY ISLANDS THIS AFTERNOON. HURRICANE CENTER LOCATED NEAR 14.7N 60.1W AT 18/1500Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 959 MB EYE DIAMETER 10 NM MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 130 KT. 64 KT....... 15NE 15SE 15SW 15NW. 50 KT....... 30NE 30SE 30SW 30NW. 34 KT.......110NE 90SE 70SW 90NW. 12 FT SEAS..120NE 90SE 90SW 120NW. 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 14.7N 60.1W AT 18/1500Z AT 18/1200Z CENTER WAS LOCATED NEAR 14.5N 59.7W FORECAST VALID 19/0000Z 15.1N 61.2W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 20NE 15SE 15SW 20NW. 50 KT... 40NE 30SE 30SW 30NW. 34 KT...120NE 90SE 80SW 90NW. FORECAST VALID 19/1200Z 15.9N 62.6W MAX WIND 125 KT...GUSTS 150 KT. 64 KT... 25NE 20SE 20SW 20NW. 50 KT... 50NE 40SE 40SW 40NW. 34 KT...120NE 100SE 90SW 100NW. FORECAST VALID 20/0000Z 16.8N 64.1W MAX WIND 130 KT...GUSTS 160 KT. 64 KT... 30NE 25SE 25SW 25NW. 50 KT... 60NE 50SE 50SW 50NW. 34 KT...120NE 120SE 90SW 100NW. FORECAST VALID 20/1200Z 17.6N 65.5W MAX WIND 130 KT...GUSTS 160 KT. 50 KT... 70NE 60SE 50SW 60NW. 34 KT...130NE 130SE 100SW 120NW. FORECAST VALID 21/1200Z 19.5N 68.5W MAX WIND 125 KT...GUSTS 150 KT. 50 KT... 70NE 60SE 50SW 60NW. 34 KT...130NE 130SE 100SW 120NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 22/1200Z 21.5N 71.0W MAX WIND 120 KT...GUSTS 145 KT. OUTLOOK VALID 23/1200Z 24.0N 72.5W MAX WIND 110 KT...GUSTS 135 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.7N 60.1W NEXT ADVISORY AT 18/2100Z $$ FORECASTER BEVEN
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