000 FZNT31 KNHC 171513 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1113 AM EDT Tue Aug 17 2021 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 Grace near 18.3N 76.8W 1005 mb at 11 AM EDT moving W at 13 kt. Maximum sustained winds 45 kt gusts 55 kt. Grace will move to 18.8N 79.0W this evening, strengthen to a hurricane near 19.2N 82.2W Wed morning, 19.7N 85.3W Wed evening, inland to 20.4N 88.3W Thu morning, weaken to a tropical storm near 20.9N 91.3W Thu evening, and strengthen to a hurricane near 21.1N 94.0W Fri morning. Grace will move inland over near 21.5N 98.5W early Sat. Grace is forecast to move near the Cayman Islands tonight, and then approach the Yucatan peninsula of Mexico late Wednesday or early Thursday. Elsewhere, fresh to strong northeast to east trades will be over the central Caribbean Tue through Wed night. NW Caribbean W of 85W ...HURRICANE WARNING... .THIS AFTERNOON...E winds 10 kt. Seas 2 ft or less. .TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 15 kt, shifting to N 15 to 25 kt in the afternoon. Seas 4 to 6 ft. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. NE winds 55 to 65 kt, shifting to SE after midnight. Seas 8 to 13 ft, building to 12 to 17 ft after midnight. .THU...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 45 to 55 kt, diminishing to 20 to 30 kt in the afternoon. Seas 9 to 14 ft, subsiding to 7 to 10 ft in the afternoon. .THU NIGHT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W ...HURRICANE WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS. E winds 15 to 25 kt S of 18N, and E 35 to 45 kt elsewhere. Seas 4 to 6 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. S of 18N, E winds 15 to 25 kt. Elsewhere, NE winds 40 to 50 kt, becoming E 50 to 60 kt after midnight. Seas 4 to 6 ft S of 18N, and 7 to 10 ft elsewhere. .WED...TROPICAL STORM CONDITIONS EXPECTED. SE winds 15 to 25 kt S of 18N, and E 50 to 65 kt elsewhere. Seas 5 to 7 ft S of 18N, and 8 to 13 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. S of 18N, E winds 10 to 20 kt,Seas 5 to 7 ft. Elsewhere, SE winds 55 to 65 kt, diminishing to 25 to 35 kt after midnight,Seas 9 to 14 ft, subsiding to 7 to 10 ft after midnight. .THU...E winds 10 to 20 kt S of 18N, and E 20 to 30 kt elsewhere. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft S of 18N, and 3 to 4 ft elsewhere. .SAT...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft S of 18N, and 3 to 4 ft elsewhere. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...SE winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .THIS AFTERNOON...SW winds less than 10 kt. Seas 2 ft or less. .TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .WED...Variable winds less than 10 kt, becoming S less than 10 kt in the afternoon. Seas 2 ft or less. .WED NIGHT...Variable winds less than 10 kt. Seas 3 ft. .THU...Variable winds less than 10 kt, becoming SW less than 10 kt in the afternoon. Seas 3 to 5 ft. .THU NIGHT...W winds less than 10 kt. Seas 3 to 5 ft. .FRI...W winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .SAT...S winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Gulf of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 20 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 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Tropical Storm Henri near 30.4N 64.3W 1004 mb at 11 AM EDT moving WSW at 5 kt. Maximum sustained winds 45 kt gusts 55 kt. Henri will move to 30.4N 65.1W this evening, 30.3N 66.5W Wed morning, 30.3N 68.2W Wed evening, 30.4N 69.7W Thu morning, 30.7N 70.6W Thu evening, and 31.6N 71.3W Fri morning. Henri will change little in intensity as it moves to near 34.1N 69.6W early Sat. On the forecast track, the center of Henri should pass well to the south of Bermuda through tonight. Otherwise, high pressure will persist across the forecast waters through the period. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .WED...SE winds 10 kt. Seas 3 to 4 ft. .WED NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .THU...SE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. .FRI...S winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...S winds 10 to 15 kt. Seas 3 ft. ATLC waters from 27N to 31N between 65W and 77W ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, E winds 10 to 15 kt. Elsewhere, N winds 20 to 30 kt, becoming NW 35 to 45 kt in the afternoon. Seas 3 to 5 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds less than 10 kt W of 70W, and NW 40 to 50 kt elsewhere. Seas 3 to 4 ft W of 70W, and 5 to 7 ft elsewhere. .WED...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, NE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, W winds 45 to 55 kt. Seas 3 to 5 ft W of 70W, and 6 to 8 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. N winds 10 to 20 kt W of 70W, and S 45 to 55 kt elsewhere. Seas 4 to 6 ft W of 70W, and 6 to 9 ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. W winds 45 to 55 kt. Seas 5 to 7 ft. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...S winds 10 to 15 kt. Seas 4 to 6 ft. Bahamas N of 22N .THIS AFTERNOON...E winds 15 to 25 kt. Seas 3 to 4 ft. .TONIGHT...SE winds 15 to 25 kt. Seas 3 to 4 ft. .WED...E winds 10 to 20 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .THU...E winds 10 to 15 kt. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .FRI...E winds 10 to 15 kt. Seas 2 ft or less. .FRI NIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft after midnight. .SAT...E winds 10 to 20 kt. Seas 3 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...SE winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...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...W of 70W, E winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 15 to 25 kt. Seas 4 to 6 ft. .TONIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .THU...E winds 10 to 20 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 4 to 5 ft. .SAT...E winds 10 to 20 kt. Seas 4 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 5 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 6 ft. .FRI...E winds 15 to 20 kt. Seas 5 to 6 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 5 to 6 ft. .SAT...E winds 15 to 20 kt. Seas 5 to 7 ft.