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Tropical Depression Thirteen Forecast Advisory Number 4
2020-08-20 22:52:11| National Hurricane Center (Atlantic)
Issued at 2100 UTC THU AUG 20 2020 000 WTNT23 KNHC 202052 TCMAT3 TROPICAL DEPRESSION THIRTEEN FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL132020 2100 UTC THU AUG 20 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A TROPICAL STORM WATCH HAS BEEN ISSUED FOR PUERTO RICO...VIEQUES... CULEBRA AND THE U.S. VIRGIN ISLANDS. THE GOVERNMENT OF ANTIGUA HAS ISSUED A TROPICAL STORM WATCH FOR THE BRITISH VIRGIN ISLANDS. THE GOVERNMENT OF FRANCE HAS ISSUED A TROPICAL STORM WATCH FOR ST. MARTIN AND ST. BARTHELEMY. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * PUERTO RICO...VIEQUES AND CULEBRA * U.S. VIRGIN ISLANDS * BRITISH VIRGIN ISLANDS * SABA AND ST. EUSTATIUS * ST. MAARTEN * ST. MARTIN AND ST. BARTHELEMY * ANTIGUA...BARBUDA...ST. KITTS...NEVIS...AND ANGUILLA A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE IN THE NORTHERN LEEWARD ISLANDS...THE VIRGIN ISLANDS...AND PUERTO RICO SHOULD MONITOR THE PROGRESS OF THIS SYSTEM...AS ADDITIONAL TROPICAL STORM WATCHES OR WARNINGS WILL BE REQUIRED FOR PORTIONS OF THOSE AREAS LATER TODAY. TROPICAL DEPRESSION CENTER LOCATED NEAR 16.7N 53.9W AT 20/2100Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 18 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. 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 16.7N 53.9W AT 20/2100Z AT 20/1800Z CENTER WAS LOCATED NEAR 16.6N 53.4W FORECAST VALID 21/0600Z 17.5N 57.2W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 21/1800Z 18.3N 60.5W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 40NE 40SE 0SW 40NW. FORECAST VALID 22/0600Z 19.1N 63.5W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 70NE 60SE 0SW 50NW. FORECAST VALID 22/1800Z 20.0N 66.7W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 90NE 70SE 20SW 70NW. FORECAST VALID 23/0600Z 20.9N 70.4W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 0SE 0SW 30NW. 34 KT...110NE 90SE 40SW 90NW. FORECAST VALID 23/1800Z 22.2N 74.1W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 30SE 0SW 30NW. 34 KT...110NE 90SE 40SW 90NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 24/1800Z 25.1N 80.4W MAX WIND 65 KT...GUSTS 80 KT. OUTLOOK VALID 25/1800Z 28.3N 84.2W MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.7N 53.9W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 21/0000Z NEXT ADVISORY AT 21/0300Z $$ FORECASTER BROWN
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