000 WTNT25 KNHC 170847 TCMAT5 TROPICAL STORM MARIA FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL152017 0900 UTC SUN SEP 17 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF BARBADOS HAS CHANGED THE TROPICAL STORM WATCH FOR DOMINICA TO A HURRICANE WATCH. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WATCH IS IN EFFECT FOR... * ANTIGUA... BARBUDA... ST. KITTS... NEVIS... AND MONTSERRAT * GUADELOUPE * DOMINICA * SABA AND ST. EUSTATIUS * ST. MAARTEN * ANGUILLA A TROPICAL STORM WATCH IS IN EFFECT FOR... * ST. LUCIA * MARTINIQUE * BARBADOS * ST. VINCENT AND THE GRENADINES 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 BRITISH AND U. S. VIRGIN ISLANDS SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. ADDITIONAL TROPICAL STORM OR HURRICANE WATCHES AND WARNINGS WILL LIKELY BE ISSUED TODAY. TROPICAL STORM CENTER LOCATED NEAR 13.0N 54.9W AT 17/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 994 MB MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT. 50 KT....... 20NE 20SE 0SW 20NW. 34 KT....... 50NE 40SE 0SW 50NW. 12 FT SEAS..120NE 30SE 0SW 90NW. 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 13.0N 54.9W AT 17/0900Z AT 17/0600Z CENTER WAS LOCATED NEAR 12.8N 54.3W FORECAST VALID 17/1800Z 13.7N 56.5W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 0SE 0SW 0NW. 50 KT... 30NE 20SE 0SW 30NW. 34 KT... 70NE 40SE 30SW 60NW. FORECAST VALID 18/0600Z 14.5N 58.3W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 20NE 0SE 0SW 0NW. 50 KT... 40NE 20SE 20SW 30NW. 34 KT... 80NE 40SE 30SW 70NW. FORECAST VALID 18/1800Z 15.2N 60.0W MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 20NE 15SE 10SW 15NW. 50 KT... 40NE 20SE 20SW 30NW. 34 KT... 80NE 60SE 40SW 70NW. FORECAST VALID 19/0600Z 15.8N 61.3W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 40NE 20SE 20SW 30NW. 34 KT... 90NE 70SE 50SW 70NW. FORECAST VALID 20/0600Z 17.0N 64.0W MAX WIND 110 KT...GUSTS 135 KT. 50 KT... 50NE 40SE 30SW 40NW. 34 KT...110NE 90SE 60SW 90NW. 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 21/0600Z 18.4N 67.0W...INLAND MAX WIND 100 KT...GUSTS 120 KT. OUTLOOK VALID 22/0600Z 19.5N 69.5W...OVER WATER MAX WIND 105 KT...GUSTS 130 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.0N 54.9W NEXT ADVISORY AT 17/1500Z $$ FORECASTER PASCH