000 FZNT31 KNHC 172116 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 502 PM 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 18.4N 77.9W 1003 mb at 5 PM EDT moving W at 13 kt. Maximum sustained winds 45 kt gusts 55 kt. Grace will move to 18.9N 80.3W Wed morning, strengthen to a hurricane near 19.4N 83.4W Wed afternoon, 20.0N 86.7W Thu morning, move inland and weaken to a tropical storm near 20.5N 89.7W Thu afternoon, strengthen to a hurricane near 20.9N 92.2W Fri morning, and 21.2N 94.8W Fri afternoon. Grace will weaken to a tropical storm while moving inland near 21.0N 99.5W Sat afternoon. Grace is forecast to move near or over the Cayman Islands late tonight and early Wednesday, and then approach the Yucatan peninsula of Mexico late Wednesday or early Thursday. Elsewhere, fresh to strong trades will be over the central Caribbean through Wed night. NW Caribbean W of 85W ...HURRICANE WARNING... .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 3 to 5 ft. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. NE winds 60 to 70 kt, shifting to SE after midnight. Seas 7 to 10 ft, building to 10 to 15 ft after midnight. .THU...TROPICAL STORM CONDITIONS EXPECTED. SE winds 45 to 55 kt, diminishing to 20 to 30 kt in the afternoon. Seas 10 to 15 ft, subsiding to 8 to 11 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. .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. Caribbean N of 15N between 72W and 85W ...HURRICANE WARNING... .TONIGHT...TROPICAL STORM CONDITIONS. S of 18N, E winds 30 to 40 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. S of 18N, SE winds 25 to 35 kt, diminishing to 15 to 25 kt in the afternoon. Elsewhere, E winds 55 to 70 kt. 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. Elsewhere, SE winds 60 to 70 kt, diminishing to 30 to 40 kt after midnight. Seas 5 to 7 ft S of 18N, and 8 to 13 ft elsewhere. .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 3 to 5 ft. .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. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft S of 18N, and 3 to 5 ft elsewhere. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .TONIGHT...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 5 to 7 ft within 90 nm of coast of Colombia, and 3 to 5 ft elsewhere. .WED NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 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. .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. SW Caribbean S of 11N .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. .SAT NIGHT...SE winds 10 to 15 kt, shifting to S after midnight. Seas 3 to 4 ft. .SUN...SE winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .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 4 ft Gulf of Venezuela, and 4 to 6 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 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 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 4 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .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 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .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. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Tropical Storm Henri near 30.4N 64.2W 997 mb at 5 PM EDT moving WSW at 2 kt. Maximum sustained winds 55 kt gusts 65 kt. Henri will move to 30.3N 65.5W Wed morning, 30.2N 67.0W Wed afternoon, 30.2N 68.6W Thu morning, 30.3N 70.0W Thu afternoon, 31.0N 71.1W Fri morning, and strengthen to a hurricane near 32.0N 71.5W Fri afternoon. Henri will change little in intensity as it moves to near 35.5N 69.6W Sat afternoon. 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 .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 5 ft. .SAT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...S winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W ...TROPICAL STORM WARNING... .TONIGHT...TROPICAL STORM CONDITIONS. W of 70W, E winds less than 10 kt. Elsewhere, NW winds 20 to 30 kt, increasing to 45 to 55 kt after midnight. Seas 3 to 4 ft W of 70W, and 6 to 9 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 9 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. N winds 10 to 20 kt W of 70W, and S 45 to 60 kt elsewhere. Seas 4 to 6 ft W of 70W, and 7 to 10 ft elsewhere. .THU...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, N winds 20 to 30 kt, increasing to 45 to 55 kt in the afternoon. Elsewhere, S winds 50 to 60 kt. Seas 6 to 8 ft. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. W of 70W, NW winds 50 to 60 kt. Elsewhere, S winds 40 to 50 kt, diminishing to 30 to 40 kt after midnight. Seas 6 to 8 ft. .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. .SAT NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...S winds 10 to 15 kt. Seas 3 to 5 ft. Bahamas N of 22N .TONIGHT...SE winds 15 to 25 kt. Seas 3 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. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 ft. .SUN...E winds 10 to 20 kt. Seas 3 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .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 less than 10 kt W of 70W, and SE 10 to 15 kt elsewhere. 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. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .SUN...E winds 10 to 20 kt. W of 70W, seas 4 to 6 ft. Elsewhere, seas 5 to 6 ft, building to 6 to 9 ft in the afternoon. ATLC waters S of 22N W of 65W .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 15 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 10 to 20 kt. Seas 4 to 6 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...E winds 15 to 25 kt. Seas 6 to 8 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 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. .SAT NIGHT...E winds 15 to 20 kt. Seas 6 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 6 to 7 ft.