571 FZNT31 KNHC 200904 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 504 AM EDT Thu Aug 20 2020 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 Depression Thirteen near 15.2N 49.8W 1008 mb at 5 AM EDT moving WNW at 18 kt. Maximum sustained winds 30 kt gusts 40 kt. Thirteen will move to 16.4N 52.7W this afternoon and strengthen to a tropical storm near 17.5N 56.4W Fri morning. The tropical storm will then reach near 18.4N 60.2W Fri afternoon, 19.1N 63.9W Sat morning, 19.8N 67.1W Sat afternoon, and 20.8N 71.0W Sun morning. Thirteen is forecast to remain a tropical storm as it passes near eastern Cuba and the southeastern Bahamas early Mon. Meanwhile, low pressure over the central Caribbean Sea this morning has a high chance of tropical formation in the northwest Caribbean within a couple of days. Regardless of development, heavy rainfall is expected across a large part of Central America and SE Mexico through the weekend. NW Caribbean W of 85W .TODAY...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .FRI...E winds 10 to 20 kt. Seas 3 ft. .FRI NIGHT...E winds 20 to 30 kt. Seas 4 to 6 ft. .SAT...SE winds 20 to 30 kt. Seas 6 to 9 ft. .SAT NIGHT...SE winds 15 to 25 kt. Seas 5 to 7 ft. .SUN...SE winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .MON...SE winds 10 to 20 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .TODAY...E winds 20 to 30 kt S of 18N, and E 10 to 20 kt elsewhere. S of 18N, seas 4 to 6 ft. Elsewhere, seas 2 ft or less, building to 3 ft in the afternoon. .TONIGHT...E winds 20 to 30 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft. .FRI...E winds 20 to 30 kt S of 18N, and E 15 to 25 kt elsewhere. Seas 4 to 6 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .SAT...S of 18N, E winds 15 to 25 kt, diminishing to 10 to 15 kt in the afternoon. Elsewhere, E winds 15 to 25 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. Caribbean from 11N to 15N W of 72W .TODAY...Within 90 nm of coast of Colombia, SE winds 10 to 20 kt. Elsewhere, N winds 20 to 30 kt, shifting to SW 15 to 25 kt in the afternoon. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt, shifting to SE in the afternoon. Seas 3 to 4 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .SUN...E winds less than 10 kt. Seas 3 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. SW Caribbean S of 11N .TODAY...W winds less than 10 kt. Seas 3 ft. .TONIGHT...NW winds less than 10 kt, shifting to SW after midnight. Seas 3 to 4 ft. .FRI...Variable winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .SAT...Variable winds less than 10 kt, becoming SE less than 10 kt in the afternoon. Seas 3 ft. .SAT NIGHT...S winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .SUN...S winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .MON...SE winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .TODAY...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .FRI...E winds 10 to 20 kt. Gulf of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .SAT...Gulf of Venezuela, E winds 10 kt in the morning, becoming variable winds less than 10 kt. Elsewhere, SE winds 10 to 15 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds less than 10 kt Gulf of Venezuela, and SE 10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .SUN...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 4 to 6 ft elsewhere. .SUN NIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft after midnight. Elsewhere, seas 5 to 7 ft. .MON...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W ...TROPICAL STORM WARNING... .TODAY...E winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 15 to 25 kt, increasing to 25 to 35 kt after midnight. Seas 6 to 9 ft. .FRI...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to 40 kt. Seas 6 to 9 ft. .FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 30 to 40 kt. Seas 6 to 9 ft. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to 35 kt, becoming E 10 to 20 kt in the afternoon. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E 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...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Tropical Depression Thirteen near 15.2N 49.8W 1008 mb at 5 AM EDT moving WNW at 18 kt. Maximum sustained winds 30 kt gusts 40 kt. Thirteen will move to 16.4N 52.7W this afternoon and strengthen to a tropical storm near 17.5N 56.4W Fri morning. The tropical storm will then reach near 18.4N 60.2W Fri afternoon, 19.1N 63.9W Sat morning, 19.8N 67.1W Sat afternoon, and 20.8N 71.0W Sun morning. Thirteen is forecast to remain a tropical storm as it passes near eastern Cuba and the southeastern Bahamas early Mon. ATLC waters from 27N to 31N W of 77W .TODAY...S winds 10 kt. Seas 4 to 5 ft. .TONIGHT...S winds 10 to 15 kt. Seas 4 ft. .FRI...S winds 10 kt. Seas 4 ft. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...S winds 10 to 15 kt, shifting to SE in the afternoon. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters from 27N to 31N between 65W and 77W .TODAY...W of 70W, S winds less than 10 kt. Elsewhere, SW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 5 ft. .TONIGHT...S winds less than 10 kt. Seas 4 ft. .FRI...S winds less than 10 kt. Seas 4 ft. .FRI NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .SAT...W of 70W, SE winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft W of 70W, and 5 to 7 ft elsewhere. .MON...E winds 10 to 20 kt. Seas 6 to 9 ft W of 70W, and 4 to 6 ft elsewhere. Bahamas N of 22N .TODAY...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...SE winds 10 to 15 kt. Seas 3 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SUN...TROPICAL STORM CONDITIONS POSSIBLE. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .MON...HURRICANE CONDITIONS POSSIBLE. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...SE winds 10 to 15 kt. Seas 4 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 20 kt W of 70W, and E 15 to 25 kt elsewhere. Seas 4 to 6 ft W of 70W, and 7 to 10 ft elsewhere. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SUN...TROPICAL STORM CONDITIONS POSSIBLE. .SUN NIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 8 to 12 ft W of 70W, and 6 to 9 ft elsewhere. .MON...E winds 10 to 20 kt. Seas 7 to 10 ft W of 70W, and 5 to 6 ft elsewhere. ATLC waters S of 22N W of 65W ...TROPICAL STORM WARNING... .TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 15 to 25 kt. Seas 5 to 7 ft. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 40 to 50 kt. Seas 7 to 10 ft. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SUN...TROPICAL STORM CONDITIONS POSSIBLE. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W ...TROPICAL STORM WARNING... .TODAY...E winds 10 to 20 kt. Seas 6 to 8 ft. .TONIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. .FRI...TROPICAL STORM CONDITIONS EXPECTED. E winds 20 to 30 kt, increasing to 30 to 40 kt in the afternoon. Seas 8 to 11 ft. .FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 35 to 45 kt. Seas 8 to 13 ft. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 35 to 45 kt, diminishing to 20 to 30 kt in the afternoon. Seas 9 to 14 ft, subsiding to 8 to 11 ft in the afternoon. .SAT NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft. .SUN...E winds 10 to 20 kt. Seas 6 to 7 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 6 ft. .MON...E winds 10 to 15 kt. Seas 5 to 6 ft.