000 FZNT31 KNHC 190817 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 417 AM EDT Wed Aug 19 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...A strong tropical wave over entering the central Caribbean this morning is producing widespread thunderstorms and gusty winds as it moves W at 20 kt. This fast speed should inhibit significant development of this system over the next day or so. However, the wave and associated low pressure should slow down and turn WNW in the western Caribbean at the end of the week, and a tropical depression is likely to form by the weekend in the NW Caribbean. There is a medium chance of tropical formation through Thu night, then a high chance by the end of the weekend. Looking ahead, low pressure associated with another tropical wave is expected to move across the Tropical N Atlc waters late Thu and approach the Atlantic waters off the Leeward Islands late Fri. This system also has the potential for tropical development. NW Caribbean W of 85W .TODAY...Variable winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E 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 less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less, building to 3 ft after midnight. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt, increasing to 15 to 25 kt after midnight. Seas 5 to 7 ft. .SAT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...SE winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .TODAY...E winds 10 to 20 kt S of 18N, and Variable less than 10 kt elsewhere. Seas 5 to 7 ft S of 18N, and 2 ft or less elsewhere. .TONIGHT...S of 18N, E winds 10 to 20 kt,Seas 5 to 7 ft. Elsewhere, Variable winds less than 10 kt, becoming E less than 10 kt after midnight,Seas 2 ft or less, building to 3 ft after midnight. .THU...S of 18N, E winds 10 to 20 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 5 to 7 ft S of 18N, and 3 to 4 ft elsewhere. .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. .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 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .TODAY...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .TONIGHT...Within 90 nm of coast of Colombia, W winds less than 10 kt, shifting to S after midnight. Elsewhere, NE winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .SAT...E winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .SUN...Variable winds less than 10 kt. Seas 3 ft. .SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. SW Caribbean S of 11N .TODAY...NE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...Variable winds less than 10 kt. Seas 3 ft. .THU...Variable winds less than 10 kt, becoming SW less than 10 kt in the afternoon. Seas 3 to 4 ft. .THU NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .FRI...S winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .SAT...Variable winds less than 10 kt. Seas 3 ft. .SAT NIGHT...Variable winds less than 10 kt. Seas 3 ft. .SUN...Variable winds less than 10 kt. Seas 3 ft. .SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .TODAY...Gulf of Venezuela, Variable winds less than 10 kt, becoming NE less than 10 kt in the afternoon,Seas 2 ft or less, building to 3 ft in the afternoon. Elsewhere, E winds 10 to 20 kt,Seas 5 to 7 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 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 5 to 7 ft elsewhere. .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 less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...NE winds less than 10 kt, shifting to SE after midnight. Seas 3 to 5 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...E winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 20 kt. Seas 6 to 8 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 25 kt. Seas 6 to 9 ft. .FRI NIGHT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .SAT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...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 5 to 7 ft. .TONIGHT...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...SE 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...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A broad and elongated area of low pressure in the central tropical Atlantic is in an environment favorable for tropical development and a tropical depression is expected to form in the next day or so as it moves WNW at 15 to 20 mph. There is a high chance of tropical formation in the next 48 hours. This system is forecast to approach the Leeward Islands Fri, move across or just north of the Virgin Islands and Puerto Rico Sat, and then Hispaniola and the Turks and Caicos Islands Sun. ATLC waters from 27N to 31N W of 77W .TODAY...SW winds less than 10 kt. Seas 4 to 5 ft. .TONIGHT...S winds 10 to 15 kt. Seas 4 to 5 ft. .THU...S winds 10 kt. Seas 4 to 5 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...S winds 10 kt. Seas 4 to 5 ft. .FRI NIGHT...S winds 10 kt. Seas 4 ft. .SAT...SE winds 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 27N to 31N between 65W and 77W .TODAY...SW winds less than 10 kt. Seas 4 to 5 ft. .TONIGHT...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 W of 70W, and Variable less than 10 kt elsewhere. Seas 4 to 5 ft. .FRI...S winds less than 10 kt. Seas 4 to 5 ft. .FRI NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 4 ft. .SAT...SE winds less than 10 kt. Seas 4 to 5 ft. .SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. Bahamas N of 22N .TODAY...SE winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...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 5 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...SE 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. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...SE winds less than 10 kt. Seas 4 to 6 ft. .TONIGHT...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. Seas 5 to 6 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 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SUN...E winds 10 to 20 kt. Seas 6 to 9 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. ATLC waters S of 22N W of 65W .TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...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 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 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. .SUN...E winds 15 to 25 kt. Seas 6 to 9 ft. .SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...E winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .FRI...E winds 15 to 20 kt. Seas 8 to 11 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .SUN...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 6 ft.