000 FZNT31 KNHC 280858 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 458 AM EDT Mon Aug 28 2023 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 Idalia is near 20.1N 85.2W at 5 AM EDT, and is moving north at 6 kt. Maximum sustained winds are 55 kt with gusts to 65 kt, and the minimum central pressure is 989 mb. Idalia will strengthen to a hurricane near 21.1N 85.1W this afternoon, move to 22.6N 85.1W Tue morning, 24.8N 84.8W Tue afternoon, 27.7N 84.0W Wed morning, inland to 30.7N 82.1W Wed afternoon, and weaken to a tropical storm near 32.8N 79.0W Thu morning. Other than Idalia, gentle to moderate winds will prevail across the basin E of 80W through early Mon. High pressure will build westward across the western Atlantic late Mon through Thu as Hurricane Franklin lifts north of the region. This will lead to moderate to fresh trade winds in the eastern Caribbean by Mon night, then in the central Caribbean by Tue, locally strong there. NW Caribbean W of 85W ...TROPICAL STORM WARNING... .TODAY...TROPICAL STORM CONDITIONS. SW winds 45 to 55 kt. Seas 5 to 7 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. SW winds 45 to 55 kt. Seas 5 to 7 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 25 to 35 kt, diminishing to 10 to 20 kt in the afternoon. Seas 4 to 6 ft. .TUE NIGHT...S winds 10 to 20 kt. Seas 3 to 5 ft. .WED...S winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .THU...SE winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...SE 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 ...HURRICANE WARNING... .TODAY...TROPICAL STORM CONDITIONS. S of 18N, SE winds 10 to 20 kt. Elsewhere, S winds 45 to 55 kt, increasing to 55 to 65 kt in the afternoon. Seas 3 ft S of 18N, and 5 to 7 ft elsewhere. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. S of 18N, SE winds 10 to 20 kt. Elsewhere, S winds 50 to 60 kt, diminishing to 35 to 45 kt after midnight. Seas 3 ft S of 18N, and 4 to 6 ft elsewhere. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. S of 18N, SE winds 10 to 20 kt. Elsewhere, S winds 25 to 35 kt, diminishing to 10 to 20 kt in the afternoon. Seas 3 to 5 ft. .TUE NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .WED...SE 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 4 to 6 ft S of 18N, and 3 ft elsewhere. .THU NIGHT...E winds 10 to 20 kt. S of 18N, seas 4 to 6 ft. Elsewhere, seas 3 ft in the evening, subsiding to 2 ft or less. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft S of 18N, and 2 ft or less elsewhere. Caribbean from 11N to 15N W of 72W .TODAY...SE winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .TUE...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .TUE NIGHT...E winds 15 to 25 kt. Seas 3 to 4 ft. .WED...E winds 15 to 25 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 within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 5 to 7 ft. SW Caribbean S of 11N .TODAY...S winds less than 10 kt. Seas 2 ft or less. .TONIGHT...N winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 2 ft or less. .TUE...SE winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .WED...N winds 10 to 15 kt. Seas 2 ft or less. .WED NIGHT...N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .THU...N winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...NW winds less than 10 kt, shifting to N after midnight. Seas 3 to 5 ft. .FRI...S winds 10 to 15 kt, shifting to W in the afternoon. Seas 3 to 5 ft. Caribbean between 64W and 72W .TODAY...Gulf of Venezuela, SE winds less than 10 kt, shifting to W in the afternoon. Elsewhere, SE winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. 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 15 to 25 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .FRI...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Gulf of Venezuela, seas 3 to 4 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 5 to 7 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 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 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. 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 5 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds 10 to 20 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...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 15 kt. Seas 3 to 5 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 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Hurricane Franklin is near 27.2N 70.8W at 5 AM EDT, and is moving north-northwest at 7 kt. Maximum sustained winds are 100 kt with gusts to 120 kt, and the minimum central pressure is 956 mb. Franklin will move to 28.3N 71.1W this afternoon, 29.8N 71.0W Tue morning, N of the area to 31.6N 70.2W Tue afternoon, 33.2N 68.6W Wed morning, then continuing northward away from the area. Meanwhile, Tropical Storm Idalia is in the Caribbean Sea near 20.1N 85.2W at 5 AM EDT, and is moving north at 6 kt. Maximum sustained winds are 55 kt with gusts to 65 kt, and the minimum central pressure is 989 mb. Idalia will strengthen to a hurricane near 21.1N 85.1W this afternoon, move to 22.6N 85.1W Tue morning, 24.8N 84.8W Tue afternoon, 27.7N 84.0W Wed morning, inland to 30.7N 82.1W Wed afternoon, and weaken to a tropical storm near 32.8N 79.0W Thu morning. Idalia will change little in intensity as it moves to 34.5N 72.0W early Fri. Expect producing increasing winds and seas offshore of central and northern Florida with the passage of Idalia. ATLC waters from 27N to 31N W of 77W .TODAY...E winds less than 10 kt. Seas 6 to 8 ft. .TONIGHT...E winds less than 10 kt, shifting to S after midnight. Seas 6 to 9 ft. .TUE...SW winds less than 10 kt. Seas 6 to 9 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 10 to 20 kt. Seas 6 to 8 ft. .WED...HURRICANE CONDITIONS POSSIBLE. S winds 15 to 25 kt, increasing to 30 to 40 kt in the afternoon. Seas 5 to 7 ft, building to 7 to 10 ft in the afternoon. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...NW winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 27N to 31N between 65W and 77W ...HURRICANE WARNING... .TODAY...HURRICANE CONDITIONS. NE winds 85 to 95 kt W of 70W, and SE 40 to 50 kt elsewhere. Seas 13 to 18 ft W of 70W, and 10 to 15 ft elsewhere. .TONIGHT...HURRICANE CONDITIONS EXPECTED. NW winds 90 to 110 kt W of 70W, and S 40 to 50 kt elsewhere. Seas 15 to 20 ft W of 70W, and 11 to 16 ft elsewhere. .TUE...HURRICANE CONDITIONS EXPECTED. W of 70W, W winds 85 to 105 kt. Elsewhere, S winds 55 to 65 kt, increasing to 65 to 75 kt in the afternoon. Seas 12 to 17 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W winds 35 to 45 kt, diminishing to 20 to 30 kt after midnight. Seas 8 to 13 ft W of 70W, and 11 to 16 ft elsewhere. .WED...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 15 to 25 kt W of 70W, and W 20 to 30 kt elsewhere. W of 70W, seas 6 to 9 ft. Elsewhere, seas 9 to 14 ft, subsiding to 8 to 11 ft in the afternoon. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...SW winds 15 to 25 kt W of 70W, and NW less than 10 kt elsewhere. Seas 6 to 8 ft W of 70W, and 4 to 5 ft elsewhere. .FRI...SW winds 10 to 20 kt W of 70W, and E less than 10 kt elsewhere. Seas 5 to 7 ft. Bahamas N of 22N .TODAY...SW winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...S winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...S winds 10 to 20 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .WED...S winds 10 to 20 kt. Seas 2 ft or less. .WED NIGHT...S winds 10 to 20 kt. Seas 2 ft or less. .THU...SE winds 10 to 15 kt. Seas 2 ft or less. .THU NIGHT...SE winds 10 to 15 kt. Seas 2 ft or less. .FRI...E winds 10 to 15 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas ...TROPICAL STORM WARNING... .TODAY...TROPICAL STORM CONDITIONS. W of 70W, W winds 55 to 65 kt, diminishing to 30 to 40 kt in the afternoon. Elsewhere, S winds 40 to 50 kt, diminishing to 25 to 35 kt in the afternoon. Seas 8 to 13 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 20 to 30 kt. Seas 7 to 10 ft. .TUE...SW winds 15 to 25 kt. Seas 6 to 9 ft. .TUE NIGHT...SW winds 10 to 20 kt. Seas 5 to 7 ft. .WED...S winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .THU...S 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 S of 22N W of 65W .TODAY...S winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...SE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...SE 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 20 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 20 kt. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...S winds 10 to 15 kt. Seas 4 to 5 ft. .TONIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 5 ft. .TUE...SE winds 10 to 15 kt. Seas 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .THU...E winds 10 to 15 kt. Seas 4 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 5 ft.