000 FZNT31 KNHC 180148 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 948 PM EDT Mon Aug 17 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...Moderate trades will generally prevail this week. A strong and fast moving tropical wave crossing the Windward Islands tonight will move over the eastern and central Caribbean Sea through Wed, and it has a low chance of tropical development in the next 48 hours. This wave will slow down in the western Caribbean late this week and upper-level winds could become more conducive for development. There is a high chance of tropical formation within 5 days. Locally heavy rainfall and gusty winds are expected over the Windward and southern Leeward Islands through Tue morning. Looking ahead, another tropical wave and low pressure system may approach the Atlantic waters off the Leeward Islands by late Fri and Sat. NW Caribbean W of 85W .OVERNIGHT...NE winds less than 10 kt. Seas 2 ft or less. .TUE...Variable winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less. .WED...Variable winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .THU...SE winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds less than 10 kt. Seas 2 ft or less. .TUE...S of 18N, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, Variable winds less than 10 kt. Seas 3 ft. .TUE NIGHT...E winds 10 to 15 kt S of 18N, and Variable less than 10 kt elsewhere. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt S of 18N, and Variable less than 10 kt elsewhere. Seas 4 to 6 ft S of 18N, and 2 ft or less elsewhere. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...Within 90 nm of coast of Colombia, E winds 10 to 15 kt, shifting to SE in the afternoon. Elsewhere, E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 3 to 5 ft. .FRI...SE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...SE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 5 ft. .SAT...E winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. SW Caribbean S of 11N .OVERNIGHT...N winds less than 10 kt. Seas 3 ft. .TUE...N winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...N winds less than 10 kt. Seas 3 to 4 ft. .WED...NE winds less than 10 kt, shifting to SE in the afternoon. Seas 3 to 4 ft. .WED NIGHT...W winds less than 10 kt. Seas 3 ft. .THU...SW winds less than 10 kt. Seas 3 ft. .THU NIGHT...Variable winds less than 10 kt. Seas 3 ft. .FRI...S winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .SAT...S winds less than 10 kt. Seas 3 ft. .SAT NIGHT...S winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .OVERNIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 5 to 7 ft elsewhere. .WED...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 5 to 7 ft elsewhere. .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 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 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. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .TUE...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 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 7 to 10 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft. .SAT...SE winds 15 to 25 kt. Seas 7 to 10 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED...E 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 less than 10 kt. Seas 4 to 6 ft. .FRI...SE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. .FRI NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...High pressure centered over the central Atlantic will dominate weather this week, bringing gentle to moderate mainly southerly winds to the area. Low pressure has formed along a tropical wave over the central tropical Atlantic. Looking ahead, environmental conditions are favorable for tropical development of this low, and a tropical depression is likely to form within a couple of days while the system moves toward the Leeward Islands by Sat. There is a medium chance of tropical formation in 48 hours and a high chance within 5 days. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...S winds less than 10 kt. Seas 4 to 5 ft. .TUE...SW winds less than 10 kt. Seas 4 to 5 ft. .TUE NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 5 ft. .WED...SW winds 10 to 15 kt. Seas 4 to 5 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 5 ft. .THU...S winds 10 to 15 kt. Seas 4 to 5 ft. .THU NIGHT...S winds 10 kt. Seas 3 to 4 ft. .FRI...S winds 10 kt. Seas 4 ft. .FRI NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. .SAT...S winds 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...S winds less than 10 kt. Seas 5 to 6 ft. .TUE...SW winds less than 10 kt. Seas 5 to 6 ft. .TUE NIGHT...S winds less than 10 kt. Seas 4 to 5 ft. .WED...SW winds less than 10 kt. Seas 4 to 5 ft. .WED NIGHT...S winds less than 10 kt. Seas 4 to 5 ft. .THU...SW winds less than 10 kt. Seas 4 to 5 ft. .THU NIGHT...S winds less than 10 kt. Seas 4 ft. .FRI...SE winds less than 10 kt. Seas 4 ft. .FRI NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .SAT...SE winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. Bahamas N of 22N .OVERNIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .TUE...SE winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 3 ft. .WED...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .WED NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .THU...SE winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...SE winds less than 10 kt. Seas 5 to 6 ft. .TUE...W of 70W, SE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Elsewhere, SE winds 10 to 15 kt. Seas 4 to 5 ft. .TUE NIGHT...SE winds less than 10 kt. Seas 4 to 5 ft. .WED...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 5 ft. .THU...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 5 ft. .THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 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 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .FRI...E winds 15 to 20 kt. Seas 6 to 9 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 8 to 11 ft. .SAT...E winds 10 to 20 kt. Seas 8 to 11 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.