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#939810 (Received by flhurricane at: 10:57 PM 12.Sep.2018) TCMAT4 TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092018 0300 UTC THU SEP 13 2018 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * MARTINIQUE * DOMINICA * GUADELOUPE A TROPICAL STORM WATCH IS IN EFFECT FOR... * ANTIGUA * MONTSERRAT * ST. KITTS AND NEVIS * SABA AND ST. EUSTATIUS * ST. MARTIN AND ST. MAARTEN A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA... IN THIS CASE WITHIN 24 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA... IN THIS CASE WITHIN 24 HOURS. INTERESTS ELSEWHERE IN THE LEEWARD ISLANDS SHOULD MONITOR THE PROGRESS OF ISAAC. TROPICAL STORM CENTER LOCATED NEAR 15.3N 58.0W AT 13/0300Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 17 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT.......150NE 0SE 0SW 120NW. 12 FT SEAS..150NE 30SE 30SW 150NW. 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 15.3N 58.0W AT 13/0300Z AT 13/0000Z CENTER WAS LOCATED NEAR 15.3N 57.2W FORECAST VALID 13/1200Z 15.5N 60.4W MAX WIND 45 KT...GUSTS 55 KT. 34 KT...120NE 0SE 0SW 90NW. FORECAST VALID 14/0000Z 15.6N 63.4W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 80NE 0SE 0SW 60NW. FORECAST VALID 14/1200Z 15.7N 66.4W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 70NE 0SE 0SW 50NW. FORECAST VALID 15/0000Z 15.7N 69.2W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 70NE 0SE 0SW 50NW. FORECAST VALID 16/0000Z 15.6N 73.9W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 70NE 0SE 0SW 50NW. 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 17/0000Z 16.5N 77.5W MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 18/0000Z 17.5N 82.0W MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.3N 58.0W NEXT ADVISORY AT 13/0900Z $$ FORECASTER BERG |