000 WTNT24 KNHC 171439 TCMAT4 POTENTIAL TROPICAL CYCLONE NINE FORECAST/ADVISORY NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 1500 UTC THU AUG 17 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF FRANCE HAS ISSUED A TROPICAL STORM WARNING FOR MARTINIQUE. THE GOVERNMENT OF BARBADOS HAS ISSUED A TROPICAL STORM WARNING FOR BARBADOS...ST. VINCENT...AND THE GRENADINES. THE GOVERNMENT OF ST. LUCIA HAS ISSUED A TROPICAL STORM WARNING FOR ST. LUCIA. THE GOVERNMENT OF BARBADOS HAS ISSUED A TROPICAL STORM WATCH FOR DOMINICA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * MARTINIQUE * ST. LUCIA * BARBADOS * ST. VINCENT AND THE GRENADINES A TROPICAL STORM WATCH IS IN EFFECT FOR... * DOMINICA A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN 24-36 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN 24-36 HOURS. POTENTIAL TROP CYCLONE CENTER LOCATED NEAR 13.1N 54.1W AT 17/1500Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 15 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 13.1N 54.1W AT 17/1500Z AT 17/1200Z CENTER WAS LOCATED NEAR 13.1N 53.3W FORECAST VALID 18/0000Z 13.1N 56.4W...TROPICAL DEPRESSION MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 18/1200Z 13.2N 59.8W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 50NE 0SE 0SW 50NW. FORECAST VALID 19/0000Z 13.5N 63.2W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 60NE 0SE 0SW 60NW. FORECAST VALID 19/1200Z 13.9N 66.7W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 30SE 30SW 60NW. FORECAST VALID 20/1200Z 14.5N 74.5W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 30NE 0SE 0SW 30NW. 34 KT... 80NE 40SE 40SW 80NW. 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 21/1200Z 15.5N 82.0W MAX WIND 65 KT...GUSTS 80 KT. OUTLOOK VALID 22/1200Z 17.0N 87.5W MAX WIND 65 KT...GUSTS 80 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.1N 54.1W NEXT ADVISORY AT 17/2100Z $$ FORECASTER BEVEN