000 FZNT31 KNHC 170919 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 519 AM 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...Recently upgraded Tropical Storm Grace near 18.2N 75.4W 1005 mb at 5 AM EDT moving W at 14 kt. Maximum sustained winds 35 kt gusts 45 kt. Grace will move to near 18.6N 77.6W this afternoon, to near 19.1N 80.7W late tonight, to near 19.7N 83.9W Wed afternoon with maximum sustained winds 50 kt gusts 60 kt, to near 20.4N 87.0W late Wed night with maximum sustained winds 60 kt gusts 75 kt and inland the northern Yucatan Peninsula near 21.0N 90.0W Thu afternoon. Elsewhere, fresh to strong northeast to east trades will be over the central Caribbean will Tue through Wed night. NW Caribbean W of 85W ...TROPICAL STORM WARNING... .TODAY...E winds 10 to 15 kt. Seas 3 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 3 ft. .WED...TROPICAL STORM 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 35 to 45 kt, becoming E to SE 40 to 50 kt late. Seas 11 to 17 ft. .THU...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 35 to 45 kt, diminishing to 20 to 30 kt in the afternoon. Seas 9 to 13 ft. .THU NIGHT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .FRI...E winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. .SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. Caribbean N of 15N between 72W and 85W ...TROPICAL STORM WARNING... .TODAY...TROPICAL STORM CONDITIONS POSSIBLE. E winds 15 to 25 kt S of 18N, and E 25 to 35 kt elsewhere. Seas 4 to 6 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 15 to 25 kt S of 18N, and E 30 to 40 kt elsewhere. Seas 4 to 6 ft. .WED...TROPICAL STORM CONDITIONS EXPECTED. SE winds 15 to 25 kt S of 18N, and E 35 to 45 kt elsewhere. Seas 4 to 6 ft S of 18N, and 8 to 12 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. S of 18N, E winds 10 to 20 kt. Elsewhere, SE winds 40 to 50 kt, becoming E 30 to 40 kt late. Seas 5 to 7 ft S of 18N, and 9 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 15 to 25 kt. Seas 5 to 7 ft S of 18N, and 3 to 4 ft elsewhere. .SAT...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 4 to 6 ft. .WED NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft within 90 nm of coast of Colombia, and 4 to 6 ft elsewhere. .THU...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 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. SW Caribbean S of 11N .TODAY...SW winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...NE 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, building to 3 ft in the afternoon. .WED NIGHT...Variable winds less than 10 kt, becoming N less than 10 kt after midnight. Seas 3 to 5 ft. .THU...SW winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...W winds less than 10 kt. Seas 3 to 5 ft. .FRI...SW winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. .SAT...S winds less than 10 kt. Seas 3 to 4 ft. Caribbean between 64W and 72W .TODAY...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .TONIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .WED...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .WED NIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .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 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 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft in the afternoon. Elsewhere, seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft. .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 5 to 7 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 5 to 7 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. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft. .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 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Recently upgraded Tropical Storm Grace near 18.2N 75.4W 1005 mb at 5 AM EDT moving W at 14 kt. Maximum sustained winds 35 kt gusts 45 kt. Grace will continue to strengthen as it approaches the northern Yucatan Peninsula late Wed night into Thu. Fresh to strong east to southeast winds north of Grace are over the waters from the southeastern Bahamas to the Dominican Republic. These winds will shift westward to the Straits of Florida through early Wed afternoon. Tropical Storm Henri near 30.6N 63.7W 1004 mb at 5 AM EDT moving WSW at 4 kt. Maximum sustained winds 45 kt gusts 55 kt. Henri will move to near 30.4N 64.4W this afternoon, to near 30.3N 65.7W late tonight with maximum sustained winds 55 kt gusts 65 kt and maintain intensity as it moves to near 30.2N 67.1W Wed afternoon, to near 30.3N 68.6W late Wed night, to near 30.8N 69.8W Thu afternoon, near 31.6N 70.6W late Thu night and to north of the area near 34.0N 69.1W late Fri night. Otherwise, high pressure will persist across the area through the period. ATLC waters from 27N to 31N W of 77W .TODAY...SE winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 3 to 4 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 ft. .THU NIGHT...S winds less than 10 kt. Seas 3 ft. .FRI...S winds less than 10 kt. Seas 3 ft. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 ft. .SAT...S winds 10 to 15 kt. Seas 3 ft. ATLC waters from 27N to 31N between 65W and 77W ...TROPICAL STORM WARNING... .TODAY...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt W of 70W, and N 15 to 25 kt elsewhere. Seas 3 to 5 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds less than 10 kt W of 70W, and NW 45 to 55 kt elsewhere. Seas 3 to 5 ft. .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 4 ft W of 70W, and 10 to 16 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. N winds 10 to 20 kt W of 70W, and SW 45 to 55 kt elsewhere. Seas 3 to 5 ft W of 70W, and 11 to 17ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, N winds 20 to 30 kt, increasing to 35 to 45 kt in the afternoon. Elsewhere, S winds 45 to 55 kt. Seas 4 to 6 ft W of 70W, and 10 to 16 ft elsewhere. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. .FRI NIGHT...S winds 20 to 30 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .SAT...S winds 10 to 15 kt. Seas 3 to 5 ft. Bahamas N of 22N .TODAY...E winds 15 to 25 kt. Seas 3 to 4 ft. .TONIGHT...SE winds 15 to 25 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 ft. .WED NIGHT...E winds 10 to 20 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 3 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 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 late. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...SE winds 10 to 15 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 4 to 6 ft. ATLC waters S of 22N W of 65W .TODAY...E winds 15 to 25 kt. Seas 5 to 7 ft. .TONIGHT...E winds 15 to 25 kt. Seas 4 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 15 to 25 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 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .SAT...E winds 15 to 25 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. .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 6 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 7 ft. .FRI...E winds 15 to 20 kt. Seas 6 to 7 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 6 to 7 ft. .SAT...E winds 15 to 20 kt. Seas 6 to 7 ft.