000 FZNT31 KNHC 301510 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1110 AM EDT Thu Jul 30 2020 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 Atlantic from 07N to 19N between 55W and 64W .SYNOPSIS...Tropical Storm Isaias is centered near 18.1N 68.9W 1003 mb at 11 AM EDT moving NW at 17 kt. Maximum sustained winds 50 kt gusts 60 kt. Isaias will move over Hispaniola to 19.7N 71.4W this evening, 21.4N 74.2W Fri morning, 23.0N 76.5W Fri evening, 24.6N 78.2W Sat morning, 26.2N 79.4W Sat evening, and 28.0N 79.9W Sun morning. Isaias will change little in intensity as it moves to near 31.5N 79.1W early Mon. Tropical storm conditions will continue for portions of the Dominican Republic and Haiti through tonight, including the Windward Passage. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...NE winds less than 10 kt. Seas 3 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .MON...E winds less than 10 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W ...TROPICAL STORM WARNING... .THIS AFTERNOON...NE winds 15 to 25 kt. Seas 4 to 6 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 15 to 25 kt, except NE 25 to 35 kt in Windward Passage. Seas 5 to 7 ft, except 7 to 11 ft in Windward Passage. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft S of 18N, and 3 ft elsewhere. .SUN...E winds 10 to 20 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 S of 18N, and 2 ft or less elsewhere. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...NE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. SW Caribbean S of 11N .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...NW winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .SAT...NE winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...N winds less than 10 kt, shifting to NE after midnight. Seas 3 to 4 ft. .SUN...N winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean between 64W and 72W ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS. SE winds 10 to 20 kt, except SE winds 25 to 35 kt N of 15N. Seas 4 to 8 ft, except 8 to 12 ft N of 15N. .TONIGHT...Gulf of Venezuela, NE winds 10 to 15 kt, diminishing to less than 10 kt. Elsewhere, SE winds 15 to 25 kt. Seas 3 to 4 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .FRI...SE winds 10 to 15 kt Gulf of Venezuela, and SE 15 to 25 kt elsewhere. Seas 3 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .FRI NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .SAT...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SUN...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .MON...SE 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 .THIS AFTERNOON...E winds 15 to 25 kt. Seas 6 to 9 ft. .TONIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft. .FRI...E winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Tropical Storm Isaias is centered near 18.1N 68.9W 1003 mb at 11 AM EDT moving NW at 17 kt. Maximum sustained winds 50 kt gusts 60 kt. Isaias will move over Hispaniola to 19.7N 71.4W this evening, 21.4N 74.2W Fri morning, 23.0N 76.5W Fri evening, 24.6N 78.2W Sat morning, 26.2N 79.4W Sat evening, and 28.0N 79.9W Sun morning. Isaias will change little in intensity as it moves to near 31.5N 79.1W early Mon. Tropical storm conditions and very large seas are expected over a large portion of the SW North Atlantic waters as the center of Isaias approaches the SE Bahamas tonight or early Fri. Isaias is forecast to be near the Central Bahamas Fri night and approach the NW Bahamas or southern Florida Fri night and Sat. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...S winds 10 to 20 kt. Seas 3 to 5 ft. .FRI...S winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 10 to 20 kt. Seas 8 to 11 ft. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to 30 kt. Seas 8 to 13 ft. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SUN...TROPICAL STORM CONDITIONS POSSIBLE. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .MON...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .FRI...SE winds 10 to 20 kt. Seas 7 to 10 ft W of 70W, and 6 to 8 ft elsewhere. .FRI NIGHT...SE winds 15 to 25 kt W of 70W, and SE 10 to 15 kt elsewhere. Seas 8 to 11 ft W of 70W, and 5 to 7 ft elsewhere. .SAT...SE winds 20 to 30 kt W of 70W, and SE 10 to 20 kt elsewhere. Seas 7 to 10 ft W of 70W, and 5 to 6 ft elsewhere. .SAT NIGHT...SE winds 15 to 25 kt W of 70W, and SE 10 to 15 kt elsewhere. Seas 6 to 9 ft W of 70W, and 5 to 6 ft elsewhere. .SUN...SE winds 15 to 25 kt W of 70W, and SE 10 to 15 kt elsewhere. Seas 6 to 8 ft W of 70W, and 5 ft elsewhere. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .MON...TROPICAL STORM CONDITIONS POSSIBLE. Bahamas N of 22N ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. E winds 20 to 30 kt. Seas 3 to 5 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to 40 kt. Seas 5 to 7 ft, building to 7 to 10 ft after midnight. .FRI...TROPICAL STORM CONDITIONS EXPECTED. E winds 40 to 50 kt. Seas 8 to 11 ft. .FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 45 to 55 kt. Seas 8 to 11 ft. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 45 to 55 kt. Seas 6 to 8 ft. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SUN...SE winds 20 to 30 kt, diminishing to 10 to 20 kt in the afternoon. Seas 3 to 5 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 35 kt. Seas 8 to 13 ft W of 70W, and 11 to 16 ft elsewhere. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 25 to 35 kt. W of 70W, seas 10 to 15 ft, building to 13 to 18 ft after midnight. Elsewhere, seas 10 to 15 ft. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 35 kt W of 70W, and E 20 to 30 kt elsewhere. Seas 13 to 18 ft W of 70W, and 8 to 11 ft elsewhere. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to 30 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 10 to 15 ft W of 70W, and 6 to 9 ft elsewhere. .SAT...SE winds 15 to 25 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 8 to 11 ft W of 70W, and 6 to 7 ft elsewhere. .SAT NIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 15 kt elsewhere. Seas 6 to 7 ft. .SUN...E winds 15 to 25 kt. Seas 5 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 6 ft. .MON...SE winds 10 to 15 kt W of 70W, and E 15 to 25 kt elsewhere. Seas 5 to 6 ft W of 70W, and 6 to 9 ft elsewhere. ATLC waters S of 22N W of 65W ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS. E winds 35 to 45 kt. Seas 13 to 18 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 40 to 50 kt. Seas 13 to 18 ft. .FRI...TROPICAL STORM CONDITIONS EXPECTED. SE winds 40 to 50 kt. Seas 9 to 14 ft. .FRI NIGHT...E winds 20 to 30 kt. Seas 6 to 9 ft. .SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...SE winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...E winds 15 to 25 kt. Seas 8 to 12 ft. .TONIGHT...E winds 15 to 20 kt. Seas 7 to 10 ft. .FRI...E winds 15 to 20 kt. Seas 7 to 8 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...E winds 15 to 25 kt. Seas 6 to 8 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .MON...SE winds 10 to 20 kt. Seas 6 to 7 ft.