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#939465 (Received by flhurricane at: 4:33 AM 11.Sep.2018) TCMAT4 TROPICAL STORM ISAAC FORECAST/ADVISORY NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092018 0900 UTC TUE SEP 11 2018 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. INTERESTS IN THE LESSER ANTILLES SHOULD MONITOR THE PROGRESS OF ISAAC. TROPICAL STORM CENTER LOCATED NEAR 14.6N 48.1W AT 11/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 997 MB MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT. 50 KT....... 20NE 0SE 0SW 20NW. 34 KT....... 40NE 10SE 10SW 40NW. 12 FT SEAS.. 90NE 60SE 60SW 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 14.6N 48.1W AT 11/0900Z AT 11/0600Z CENTER WAS LOCATED NEAR 14.6N 47.5W FORECAST VALID 11/1800Z 14.6N 50.1W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 10SE 10SW 40NW. FORECAST VALID 12/0600Z 14.6N 52.6W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 0SE 0SW 0NW. 50 KT... 30NE 10SE 10SW 20NW. 34 KT... 50NE 30SE 30SW 50NW. FORECAST VALID 12/1800Z 14.8N 55.0W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 15NE 0SE 0SW 0NW. 50 KT... 30NE 10SE 10SW 20NW. 34 KT... 70NE 50SE 40SW 70NW. FORECAST VALID 13/0600Z 15.1N 57.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 20SE 10SW 20NW. 34 KT... 80NE 50SE 40SW 70NW. FORECAST VALID 14/0600Z 15.5N 62.8W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 40NE 20SE 20SW 30NW. 34 KT... 80NE 50SE 40SW 80NW. 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 15/0600Z 15.6N 67.4W MAX WIND 55 KT...GUSTS 65 KT. OUTLOOK VALID 16/0600Z 15.8N 72.0W MAX WIND 50 KT...GUSTS 60 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.6N 48.1W NEXT ADVISORY AT 11/1500Z $$ FORECASTER CANGIALOSI |