425 FZNT31 KNHC 082118 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 518 PM EDT Sat Sep 8 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...Tropical Storm Isaac near 14.5N 36.6W 1005 mb at 5 PM EDT moving W at 6 kt. Maximum sustained winds 35 kt gusts 45 kt. Isaac will move to 14.6N 37.7W Sun morning, 14.7N 39.5W Sun afternoon, 14.7N 42.0W Mon morning, strengthen to a hurricane near 14.7N 44.6W Mon afternoon, and 14.5N 50.0W Tue afternoon. Isaac will change little in intensity as it moves east of the Lesser Antilles near 14.5N 55.5W Wed afternoon, and continue to 15.0N 61.0W Thu. Otherwise, relatively weak ridging over the western Atlantic will maintain moderate to fresh trade winds over most of the region into Sun. Building high pressure over the eastern Gulf of Mexico will allow fresh to locally strong E to SE winds and building seas over portions of the NW Caribbean Sun through Tue. NW Caribbean W of 85W .TONIGHT...SE winds 10 to 20 kt. Seas 2 ft or less, building to 3 to 4 ft after midnight. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...SE 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...SE winds 10 to 20 kt. 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 4 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. Caribbean N of 15N between 72W and 85W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SUN...E winds 10 to 15 kt. Seas 3 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 ft. .MON...E winds 10 to 20 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 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 20 kt. Seas 3 ft. Caribbean from 11N to 15N W of 72W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...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 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 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. SW Caribbean S of 11N .TONIGHT...Variable winds less than 10 kt. Seas 3 ft. .SUN...Variable winds less than 10 kt. Seas 3 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .MON...NE winds less than 10 kt. Seas 3 ft. .MON NIGHT...NE winds less than 10 kt, shifting to N after midnight. Seas 3 ft. .TUE...N winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .WED...NE winds 10 to 15 kt. Seas 3 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 ft. .THU...SE winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .SUN...E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .SUN NIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft after midnight. Elsewhere, seas 3 to 5 ft. .MON...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. .MON NIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft after midnight. Elsewhere, seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...NE winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TONIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .SUN...E winds less than 10 kt. Seas 4 to 6 ft. .SUN NIGHT...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. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...E winds 55 to 65 kt. Seas 10 to 15 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .SUN...E winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...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 4 to 6 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...S winds 55 to 65 kt. Seas 8 to 13 ft. Synopsis for the the SW N ATLC including the Bahamas .SYNOPSIS...Tropical Storm Florence near 24.6N 54.7W 989 mb at 5 PM EDT moving W at 4 kt. Maximum sustained winds 60 kt gusts 75 kt. Florence will strengthen to a hurricane near 24.6N 55.4W Sun morning, move to 24.7N 56.6W Sun afternoon, 25.0N 58.3W Mon morning, 25.4N 60.5W Mon afternoon, and 26.9N 66.4W Tue afternoon. Florence will change little in intensity as it moves over the north-central offshores near 29.5N 72.5W Wed afternoon, and continue to 32.5N 77.0W Thu. Otherwise, a weak pressure pattern across the SW N Atlc will maintain gentle to moderate mainly easterly winds across the area through Mon. ATLC waters from 27N to 31N W of 77W .TONIGHT...SE winds 10 kt. Seas 4 to 5 ft. .SUN...S winds 10 kt. Seas 5 ft. .SUN NIGHT...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...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...SW winds 25 to 35 kt. Seas 12 to 17 ft. ATLC waters from 27N to 31N between 65W and 77W .TONIGHT...SW winds less than 10 kt. Seas 5 to 6 ft. .SUN...SW winds less than 10 kt. Seas 5 to 6 ft. .SUN NIGHT...W of 70W, E winds less than 10 kt. Elsewhere, N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 7 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt. Seas 6 to 8 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. W of 70W, NE winds 10 to 15 kt,Seas 5 to 7 ft. Elsewhere, N winds 15 to 25 kt, increasing to 25 to 35 kt after midnight,Seas 7 to 10 ft, building to 8 to 13 ft after midnight. .TUE...HURRICANE CONDITIONS POSSIBLE. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...W of 70W, S winds 80 to 90 kt, diminishing to 30 to 40 kt in the afternoon. Elsewhere, SE winds 10 to 15 kt. Seas 11 to 16 ft W of 70W, and 6 to 8 ft elsewhere. Bahamas N of 22N .TONIGHT...SE winds less than 10 kt. Seas 3 ft. .SUN...SE winds less than 10 kt. Seas 3 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 ft. .MON...E winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...E winds 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 10 to 15 kt. Seas 4 to 6 ft. .THU...SE winds 10 to 15 kt. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...E winds less than 10 kt. Seas 5 to 6 ft. .SUN...NE winds less than 10 kt. Seas 5 to 6 ft. .SUN NIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 7 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt. Seas 6 to 8 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. W of 70W, NE winds 10 to 15 kt,Seas 5 to 7 ft. Elsewhere, N winds 15 to 25 kt, becoming NW 25 to 35 kt after midnight,Seas 7 to 10 ft, building to 8 to 13 ft after midnight. .TUE...HURRICANE CONDITIONS POSSIBLE. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...E winds 10 to 15 kt. Seas 7 to 9 ft. ATLC waters S of 22N W of 65W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .MON NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. .TUE...SE winds less than 10 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. 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. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...N winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...NW winds 10 to 20 kt. Seas 7 to 8 ft. .SUN NIGHT...NW winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 6 to 8 ft. .MON...S winds less than 10 kt. Seas 6 to 8 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 6 to 9 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 9 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED...E winds 10 to 20 kt. Seas 7 to 10 ft. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...E winds 10 to 20 kt. Seas 8 to 11 ft.