705 FZNT31 KNHC 100312 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1112 PM EDT Sun Sep 9 2018 Marine Weather HF Voice Broadcast for the Tropical N Atlantic from 07N to 22N between 55W and 64W, the SW N Atlantic S of 31N W of 65W including Bahamas, and the Caribbean Sea. Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. Synopsis for Caribbean Sea and Tropical N ATLC from 07N to 19N between 55W and 64W .SYNOPSIS...Newly upgraded Hurricane Isaac near 14.5N 41.6W 997 mb at 11 PM EDT moving W at 12 kt. Maximum sustained winds 65 kt gusts 80 kt. Isaac will move to 14.9N 46.3W Mon evening, 14.9N 48.0W Tue morning, 15.0N 52.0W Tue evening, and 15.2N 57.3W Wed evening. Isaac will weaken to a tropical storm near 15.5N 63.5W Thu evening, and continue to weaken as it moves to the central Caribbean near 15.5N 70.0W Fri. Otherwise, relatively weak ridging over the western Atlantic will maintain moderate to fresh trade winds over most of the region through Mon night. NW Caribbean W of 85W .OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...SE winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...SE winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 ft. .THU...E winds 10 to 15 kt. Seas 3 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. Caribbean from 11N to 15N W of 72W .OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .THU...E winds 10 to 20 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. SW Caribbean S of 11N .OVERNIGHT...NE winds less than 10 kt. Seas 3 ft. .MON...NE winds less than 10 kt. Seas 3 ft. .MON NIGHT...N winds less than 10 kt, shifting to NE after midnight. Seas 3 to 4 ft. .TUE...N winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 ft. .THU...E winds less than 10 kt. Seas 3 ft. .THU NIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...SE winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 20 kt. Gulf of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .MON...E winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 20 kt, increasing to 20 to 30 kt after midnight. Seas 6 to 9 ft. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...SE winds 20 to 30 kt, becoming E 10 to 20 kt in the afternoon. Seas 8 to 13 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .MON...E winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 20 to 30 kt. Seas 5 to 7 ft. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...SE winds 20 to 30 kt, diminishing to 10 to 20 kt in the afternoon. Seas 7 to 10 ft. Synopsis for the the SW N ATLC including the Bahamas .SYNOPSIS...Hurricane Florence near 24.6N 57.7W 974 mb at 11 PM EDT moving W at 6 kt. Maximum sustained winds 80 kt gusts 100 kt. Florence will move to 24.9N 59.1W Mon morning, 25.6N 61.5W Mon evening, 26.5N 64.4W Tue morning, 27.8N 67.6W Tue evening, and 31.2N 73.6W Wed evening. Florence is forecast to rapidly strengthen to a major hurricane by Monday night, and is expected to remain an extremely dangerous major hurricane through Thursday.Florence will continue to 34.0N 77.5W Thu evening, and weaken to a tropical storm while moving inland over 35.2N 79.0W Fri evening. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...S winds 10 kt. Seas 5 ft. .MON...S winds 10 kt. Seas 5 ft. .MON NIGHT...SE winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 4 to 5 ft. .TUE...Variable winds less than 10 kt. Seas 5 to 6 ft. .TUE NIGHT...Variable winds less than 10 kt. Seas 6 to 8 ft. .WED...TROPICAL STORM CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters from 27N to 31N between 65W and 77W ...HURRICANE WARNING... .OVERNIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...NE winds 10 to 15 kt. Seas 6 to 8 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 15 kt W of 70W, and N 20 to 30 kt elsewhere. W of 70W, seas 5 to 7 ft. Elsewhere, seas 7 to 10 ft, building to 8 to 13 ft after midnight. .TUE...HURRICANE CONDITIONS EXPECTED. W of 70W, NE winds 10 to 20 kt,Seas 7 to 10 ft. Elsewhere, N winds 40 to 50 kt, becoming NE 85 to 105 kt in the afternoon,Seas 12 to 17 ft, building to 17 to 27 ft in the afternoon. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. W of 70W, N winds 20 to 30 kt, increasing to 40 to 50 kt after midnight,Seas 8 to 13 ft, building to 13 to 18 ft after midnight. Elsewhere, SE winds 90 to 110 kt,Seas 21 to 31 ft. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. Bahamas N of 22N .OVERNIGHT...E winds less than 10 kt. Seas 3 ft. .MON...E winds less than 10 kt. Seas 3 ft. .MON NIGHT...NE winds less than 10 kt. Seas 3 ft. .TUE...NE winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .WED...E winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...HURRICANE WARNING... .OVERNIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...NE winds 10 to 15 kt. Seas 6 to 8 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 15 kt W of 70W, and NW 20 to 30 kt elsewhere. W of 70W, seas 5 to 7 ft. Elsewhere, seas 7 to 10 ft, building to 8 to 13 ft after midnight. .TUE...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, N winds 10 to 20 kt,Seas 7 to 10 ft. Elsewhere, NW winds 45 to 55 kt, becoming W 80 to 100 kt in the afternoon,Seas 12 to 17 ft, building to 15 to 20 ft in the afternoon. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. W of 70W, NW winds 20 to 30 kt. Elsewhere, SW winds 55 to 65 kt, becoming S 20 to 30 kt after midnight. Seas 9 to 14 ft W of 70W, and 13 to 18 ft elsewhere. .WED...TROPICAL STORM CONDITIONS POSSIBLE. .WED NIGHT...SE winds 10 to 20 kt. Seas 8 to 13 ft W of 70W, and 7 to 9 ft elsewhere. .THU...E winds 10 to 15 kt. Seas 8 to 11 ft W of 70W, and 7 to 8 ft elsewhere. .THU NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft. .FRI...E winds 10 to 15 kt. Seas 7 to 8 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .MON...NE winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. .TUE...E winds less than 10 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt. Seas 6 to 8 ft. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...NW winds less than 10 kt. Seas 6 to 8 ft. .MON...SW winds 10 to 15 kt, shifting to S in the afternoon. Seas 6 to 8 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .WED...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED NIGHT...E winds 15 to 20 kt. Seas 8 to 11 ft. .THU...E winds 10 to 20 kt. Seas 8 to 11 ft. .THU NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .FRI...E winds 10 to 20 kt. Seas 7 to 10 ft.