000 FZNT31 KNHC 170320 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1120 PM EDT Mon Aug 16 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...Tropical Depression Grace near 18.2N 73.8W 1006 mb at 11 PM EDT moving W at 13 kt. Maximum sustained winds 30 kt gusts 40 kt. Grace will strengthen to a tropical storm near 18.6N 75.7W Tue morning with maximum sustained winds 35 kt gusts 45 kt, move to near 19.1N 78.8W Tue evening, to near 19.7N 82.0W Wed morning with maximum sustained winds 45 kt gusts 55 kt, to near 20.3N 85.1W Wed evening with maximum sustained winds 50 kt gusts 60 kt and inland the northern Yucatan Peninsula near 21.0N 88.2W early Thu. 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... .OVERNIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt, becoming N 15 to 25 kt in the afternoon. Seas 3 to 4 ft, building to 7 to 10 ft in the afternoon. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 35 to 45 kt, becoming SE 40 to 50 kt late. Seas 5 to 7 ft, building to 9 to 13 ft late. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. .SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W ...TROPICAL STORM WARNING... .OVERNIGHT...E winds 20 to 30 kt. Seas 2 ft or less. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. E winds 15 to 25 kt S of 18N, and E 25 to 35 kt elsewhere. Seas 3 to 5 ft. .TUE NIGHT...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 POSSIBLE. S of 18N, E winds 10 to 20 kt. Elsewhere, SE winds 40 to 50 kt, becoming E 30 to 40 kt after midnight. 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 S of 18N, and 7 to 10 ft elsewhere. .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 S of 18N, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...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 to 4 ft in the afternoon. .TUE NIGHT...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 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 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 4 to 6 ft. SW Caribbean S of 11N .OVERNIGHT...NW winds less than 10 kt. Seas 2 ft or less. .TUE...SW winds 10 to 15 kt. Seas 2 ft or less. .TUE NIGHT...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. .WED NIGHT...Variable winds less than 10 kt, becoming N less than 10 kt after midnight. Seas 2 ft or less, building to 3 ft after midnight. .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 5 ft. .SAT...S winds less than 10 kt. Seas 3 to 5 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 5 to 7 ft elsewhere. .TUE...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. .TUE NIGHT...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 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .FRI...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .FRI NIGHT...E winds 10 to 15 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Gulf of Venezuela, seas 2 ft or less, building to 3 ft after midnight. Elsewhere, seas 4 to 6 ft. .SAT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 5 ft. .TUE...E winds 10 to 20 kt. Seas 4 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. .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 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 6 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 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...Tropical Depression Grace near 18.2N 73.8W 1006 mb at 11 PM EDT moving W at 13 kt. Maximum sustained winds 30 kt gusts 40 kt. Grace will strengthen to a tropical storm between Jamaica and southeastern Cuba Tue morning and continue in west- northwest motion will continuing to strengthen as it approaches the northern Yucatan Peninsula late Wed 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 30.7N 63.3W 1008 mb at 11 PM EDT moving SW at 4 kt. Maximum sustained winds 40 kt gusts 50 kt. Henri will strengthen some as it moves to near 30.5N 63.8W Tue morning, to near 30.4N 64.8W Tue evening with maximum sustained winds 50 kt gusts to 60 kt, and maintain intensity as it moves to near 30.3N 66.2W early Wed, to near 30.3N 67.8W Wed evening, to near 30.5N 69.3W early Thu, to near 31.3N 70.1W Thu evening and to just north of the area near 32.8N 69.7W Fri evening. Otherwise, high pressure will persist across the area through the period. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...SE winds 10 to 20 kt. Seas 4 to 5 ft. .TUE...SE winds 10 to 20 kt. Seas 4 to 5 ft. .TUE NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 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 to 4 ft. .FRI...S winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...S winds 10 to 15 kt. Seas 3 ft. ATLC waters from 27N to 31N between 65W and 77W ...TROPICAL STORM WARNING... .OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 3 to 5 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, E winds less than 10 kt. Elsewhere, NW winds 20 to 30 kt, increasing to 40 to 50 kt late. Seas 3 to 5 ft, building to 7 to 11 ft late. .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 40 to 50 kt. Seas 3 to 4 ft W of 70W, and 9 to 13 ft elsewhere. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 10 to 20 kt W of 70W, and SW 40 to 50 kt elsewhere. Seas 3 to 5 ft W of 70W, and 6 to 8 ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. .FRI NIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...S winds 10 to 15 kt. Seas 3 to 5 ft. Bahamas N of 22N .OVERNIGHT...E winds 10 to 20 kt. Seas 3 ft. .TUE...E winds 15 to 25 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 15 to 25 kt. Seas 3 to 4 ft. .WED...E winds 10 to 20 kt. Seas 3 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 3 ft in the evening, subsiding to 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 2 ft or less. .SAT...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 to 4 ft in the afternoon. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...SE 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 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 after midnight. 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 5 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 .OVERNIGHT...E winds 20 to 30 kt. Seas 5 to 7 ft. .TUE...E winds 15 to 25 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 15 to 25 kt. Seas 3 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 .OVERNIGHT...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 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 5 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.