000 FZNT31 KNHC 220911 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 511 AM EDT Sun Oct 22 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...Hurricane Tammy is near 18.5N 62.3W at 5 AM EDT, and is moving north-northwest at 9 kt. Maximum sustained winds are 75 kt with gusts to 90 kt, and the minimum central pressure is 992 mb. Tammy will move to 19.5N 62.9W this afternoon, 20.8N 63.5W Mon morning, and 21.9N 63.5W Mon afternoon. Hurricane Tammy will reach 22.7N 63.1W Tue morning, 23.2N 62.5W Tue afternoon, and 23.8N 61.9W Wed morning. Tammy will change little in intensity as it moves farther N of the Leeward Islands early Thu. Shower and thunderstorm activity has increased with an area of low pressure located over the southwestern Caribbean Sea. Environmental conditions appear generally favorable for some additional development of this system over the next day or two before it moves inland over Central America by Tuesday. NW Caribbean W of 85W .TODAY...NE winds 10 to 15 kt. Seas 3 ft. .TONIGHT...NE winds 10 to 15 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 5 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 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. Caribbean N of 15N between 72W and 85W .TODAY...NE winds 10 to 15 kt. Seas 3 ft. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft after midnight. .MON...E winds 10 to 20 kt. Seas 3 to 4 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 20 kt S of 18N, and NE 15 to 25 kt elsewhere. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt elsewhere. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 20 kt S of 18N, and NE 15 to 25 kt elsewhere. Seas 3 to 5 ft. .THU...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt elsewhere. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .TODAY...Variable winds less than 10 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. .TONIGHT...NE winds less than 10 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 3 ft. .MON...E winds 10 to 20 kt. Seas 3 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 ft. .TUE...E winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .TUE NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .WED...E winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...Within 90 nm of coast of Colombia, SE winds less than 10 kt. Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .THU...S winds less than 10 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less, building to 3 ft in the afternoon. SW Caribbean S of 11N .TODAY...SW winds 10 to 15 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .TONIGHT...SW winds 10 to 15 kt. Seas 2 ft or less. .MON...S winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .MON NIGHT...S winds less than 10 kt. Seas 2 ft or less. .TUE...S winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...W winds less than 10 kt. Seas 2 ft or less. .WED...W winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...W winds less than 10 kt. Seas 2 ft or less. .THU...W winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .TODAY...Gulf of Venezuela, Variable winds less than 10 kt. Elsewhere, NW winds 10 to 15 kt, shifting to S in the afternoon. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .TONIGHT...NE winds less than 10 kt, shifting to E after midnight. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .MON...SE winds less than 10 kt. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .TUE...NE winds less than 10 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .TUE NIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...NE winds less than 10 kt Gulf of Venezuela, and NE 10 to 20 kt elsewhere. Seas 3 ft. .WED NIGHT...E winds less than 10 kt Gulf of Venezuela, and NE 10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .THU...Variable winds less than 10 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W ...HURRICANE WARNING... .TODAY...TROPICAL STORM CONDITIONS. SE winds 60 to 70 kt, diminishing to 35 to 45 kt in the afternoon. Seas 7 to 10 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to 35 kt. Seas 5 to 7 ft. .MON...SE winds 15 to 25 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED...S winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .THU...SE winds 10 to 15 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...SE winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 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, shifting to SE in the afternoon. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...SE winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Hurricane Tammy is near 18.5N 62.3W at 5 AM EDT, and is moving north-northwest at 9 kt. Maximum sustained winds are 75 kt with gusts to 90 kt, and the minimum central pressure is 992 mb. Tammy will move to 19.5N 62.9W this afternoon, 20.8N 63.5W Mon morning, and 21.9N 63.5W Mon afternoon. Hurricane Tammy will reach 22.7N 63.1W Tue morning, 23.2N 62.5W Tue afternoon, and 23.8N 61.9W Wed morning. Tammy will change little in intensity as it moves farther N of the Leeward Islands early Thu. Farther W, a slow moving cold front stretches from near Bermuda to the central Florida Peninsula. This front will slide east and gradually dissipate into tonight. A second cold front will move off Florida tonight, then move E across the northern portions of the waters early this week. Looking ahead, high pressure building in the wake of the front combined with the impacts of Hurricane Tammy will bring an increase in winds and seas across the forecast area Tue through Wed night. ATLC waters from 27N to 31N W of 77W .TODAY...W winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...NE winds 15 to 25 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 20 to 30 kt. Seas 6 to 9 ft. .WED...E winds 20 to 30 kt. Seas 7 to 9 ft. .WED NIGHT...E winds 20 to 30 kt. Seas 8 to 10 ft. .THU...E winds 20 to 30 kt. Seas 8 to 11 ft. ATLC waters from 27N to 31N between 65W and 77W .TODAY...W winds 10 to 15 kt. Seas 6 to 9 ft. .TONIGHT...NW winds 10 to 15 kt. Seas 6 to 8 ft. .MON...N winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .TUE...NE winds 15 to 25 kt. Seas 7 to 9 ft. .TUE NIGHT...NE winds 20 to 30 kt. Seas 8 to 11 ft. .WED...NE winds 20 to 30 kt. Seas 8 to 12 ft. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. Bahamas N of 22N .TODAY...NE winds 10 to 15 kt. Seas 3 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 3 ft. .MON...NE winds 10 to 20 kt. Seas 3 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...NE winds 10 to 20 kt, increasing to 20 to 30 kt in the afternoon. Seas 3 to 5 ft. .TUE NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. .WED...NE winds 20 to 30 kt. Seas 5 to 7 ft. .WED NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. .THU...NE winds 20 to 30 kt. Seas 6 to 8 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...NE winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt. Seas 5 to 7 ft W of 70W, and 7 to 9 ft elsewhere. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 5 to 7 ft W of 70W, and 8 to 11 ft elsewhere. .MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 6 to 8 ft W of 70W, and 8 to 11 ft elsewhere. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt elsewhere. Seas 8 to 11 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .WED...NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt elsewhere. Seas 10 to 12 ft. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters S of 22N W of 65W .TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt. Seas 6 to 8 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 6 to 9 ft. .MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...NE winds 15 to 25 kt. Seas 6 to 8 ft. .WED...NE winds 15 to 25 kt. Seas 6 to 9 ft. .WED NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. .THU...NE winds 15 to 25 kt. Seas 7 to 10 ft. ATLC waters from 19N to 22N between 55W and 65W ...HURRICANE WARNING... .TODAY...TROPICAL STORM CONDITIONS. E winds 60 to 75 kt. Seas 9 to 14 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to 75 kt. Seas 10 to 15 ft. .MON...TROPICAL STORM CONDITIONS EXPECTED. SE winds 65 to 75 kt. Seas 9 to 14 ft. .MON NIGHT...TROPICAL STORM CONDITIONS EXPECTED. S winds 50 to 60 kt, diminishing to 30 to 40 kt after midnight. Seas 7 to 10 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. S winds 25 to 35 kt. Seas 6 to 8 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .WED...TROPICAL STORM CONDITIONS POSSIBLE. .WED NIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .THU...SE winds 10 to 15 kt. Seas 6 to 8 ft.