000 FZNT31 KNHC 262118 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 518 PM EDT Sun Sep 26 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...Major Hurricane Sam near 14.2N 50.5W 938 mb at 5 PM EDT moving NW at 6 kt. Maximum sustained winds 130 kt gusts 160 kt. Sam will move to near 14.7N 51.3W late tonight, then begin to slowly weaken as it nears 15.5N 52.5W Mon afternoon, to near 16.3N 53.6W late Mon night, to near 17.2N 54.7W Tue afternoon, with maximum sustained winds 120 kt gusts 145 kt, to near 18.1N 55.8W late Tue night and to near 19.2N 57.4W Wed afternoon, with maximum sustained winds 115 kt gusts 140 kt. Sam will change little in intensity as it moves to near 22.1N 60.5W Thu afternoon and to near 26.6N 62.9W Fri afternoon. Meanwhile, moderate trades will continue over much of the Caribbean into early next week. Fresh trades over the south-central Caribbean will diminish to gentle to moderate speeds Tue. Mainly gentle trades will be over the rest of the Caribbean through Thu, while fresh trades will follow in the wake of Sam across the Tropical N Atlantic waters. Swells generated by Sam are forecast to reach the Lesser Antilles early this week. NW Caribbean W of 85W .TONIGHT...E winds 10 kt. Seas 2 to 3 ft. .MON...E winds less than 10 kt. Seas 2 to 3 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds less than 10 kt. Seas 2 to 3 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. .WED...E winds less than 10 kt. Seas 2 to 3 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .THU...E winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...E winds 10 kt. Seas 2 to 3 ft. Caribbean N of 15N between 72W and 85W .TONIGHT...NE winds 10 to 15 kt. Seas 3 ft. .MON...NE winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. Seas 3 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less. .WED...E winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...E winds less than 10 kt. Seas 2 ft or less. .THU...E winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...E winds less than 10 kt S of 18N, and NE 10 to 15 kt elsewhere. Seas 2 ft or less. .FRI...S of 18N, E winds less than 10 kt. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .TONIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. .MON...NE winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 ft. .THU...E winds less than 10 kt. Seas 3 ft. .THU NIGHT...E winds less than 10 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 3 ft. .FRI...E winds less than 10 kt. Seas 3 ft. SW Caribbean S of 11N .TONIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .TUE...N winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...N winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .WED...N winds less than 10 kt. Seas 3 ft. .WED NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .THU...Variable winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...Variable winds less than 10 kt, becoming NW less than 10 kt after midnight. Seas 2 ft or less. .FRI...NW winds less than 10 kt, shifting to SW in the afternoon. Seas 2 ft or less. Caribbean between 64W and 72W .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...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 to 4 ft elsewhere. .WED NIGHT...E 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 to 4 ft elsewhere. .THU...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 to 4 ft elsewhere. .THU NIGHT...E 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 to 4 ft elsewhere. .FRI...Gulf of Venezuela, SE winds less than 10 kt, shifting to NE in the afternoon. Elsewhere, E winds 10 to 15 kt. 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... .TONIGHT....NE to E winds 10 to 15 kt. Seas 6 to 8 ft. .MON...NE to E winds 15 to 20 kt. Seas 7 to 10 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 15 to 20 kt, becoming N to NE 25 to 30 kt late. Seas 7 to 11 ft ,except building to 11 to 19 ft far E part late. .TUE...TROPICAL STORM CONDITIONS EXPECTED. N to NE winds 25 to 30 kt, becoming N 60 to 70 kt in the afternoon. Seas 10 to 15 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. NW winds 95 to 115 kt. Seas 21 to 31 ft, except 28 to 39 ft NE part. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...E winds 15 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 15 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 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...SE winds 10 to 15 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 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 5 to 7 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A surface trough extends from near 30N72W to the central Bahamas and to 22N77W. Scattered showers and thunderstorms are along and near this trough. The trough will move little tonight, then gradually shift eastward through late Wed in response to weak high pressure that will build southeastward over the northwest forecast waters. Stronger high pressure will then build southward over the NW and north-central offshore waters late in the week. Major Hurricane Sam located over the tropical N Atlantic near 14.2N 50.5W 938 mb at 5 PM EDT is moving NW at 6 kt, with maximum sustained winds 130 kt gusts 160 kt. Sam is forecast to continue on its motion over the next few days as it slowly weakens reaching near 27N63W by Fri afternoon, with maximum sustained winds 110 kt gusts 135 kt. Swells generated by Sam are expected to spread westward across the forecast waters late in the week. ATLC waters from 27N to 31N W of 77W .TONIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .TUE NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .THU...NE winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...NE winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 27N to 31N between 65W and 77W .TONIGHT...N winds 10 to 15 kt W of 70W, and W less than 10 kt elsewhere. Seas 3 to 5 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...W of 70W, NE winds 10 to 15 kt. Elsewhere, NE winds 10 to 15 kt, shifting to E after midnight. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt W of 70W, and SE less than 10 kt elsewhere. Seas 3 to 4 ft. .TUE NIGHT...W of 70W, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, SE winds less than 10 kt. Seas 3 to 4 ft. .WED...W of 70W, NE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, Variable winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. Seas 3 to 5 ft. .THU...NE winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. Seas 3 to 5 ft. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...NE winds 10 to 15 kt W of 70W, and NE 20 to 30 kt elsewhere. W of 70W, seas 6 to 8 ft. Elsewhere, seas 7 to 10 ft, building to 9 to 14 ft in the afternoon. Bahamas N of 22N .TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .MON...NE winds 10 to 15 kt. Seas 2 ft or less. .MON NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .TUE...NE winds 10 to 15 kt. Seas 2 ft or less. .TUE NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .WED...NE to E winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 ft. .THU...NE winds 10 to 15 kt. Seas 3 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .MON...W of 70W, NE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, Variable winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt W of 70W, and SE less than 10 kt elsewhere. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt W of 70W, and SE less than 10 kt elsewhere. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt W of 70W, and SE less than 10 kt elsewhere. Seas 4 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...NE winds 10 to 15 kt W of 70W, and N 20 to 30 kt elsewhere. W of 70W, seas 6 to 9 ft. Elsewhere, seas 10 to 15 ft, building to 13 to 18 ft in the afternoon. ATLC waters S of 22N W of 65W .TONIGHT...NE winds less than 10 kt, shifting to E after midnight. Seas 3 ft. .MON...E winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less, building to 3 to 4 ft after midnight. .TUE...E winds 10 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 kt. Seas 3 to 4 ft. .WED...E winds 10 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...HURRICANE CONDITIONS POSSIBLE. E winds 20 to 30 kt. Seas 6 to 9 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. E winds 20 to 30 kt, increasing to 35 to 45 kt after midnight. Seas 7 to 10 ft, building to 11 to 16 ft late. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...SE winds 15 to 25 kt. Seas 8 to 11 ft.