000 FZNT31 KNHC 281502 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1102 AM EDT Sat Oct 28 2017 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 ATLC from 07N to 19N between 55W and 64W .SYNOPSIS...Tropical Depression Eighteen near 23.0N 81.8W 1005 mb at 1500 UTC moving NNE at 19 kt. Maximum sustained winds 30 kt gust to 40 kt. The depression is forecast to strengthen to a tropical storm over western Cuba near 23.0N 81.8W this evening, quickly moving NE across the Straits of Florida, then will continue NE toward the NW Bahamas by Sun morning. A cold front will penetrate the NW Caribbean in the wake of the tropical cyclone, bringing fresh northerly winds and seas to 8 ft to the Yucatan Channel. Winds and seas will diminish elsewhere through early next week as high pressure ridge N of the region is weakened by the emerging tropical cyclone. NW Caribbean W of 85W .THIS AFTERNOON...NW winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...NW winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...NW winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. .MON...N winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...SE winds 10 to 15 kt S of 18N, and S 15 to 25 kt elsewhere. Seas 4 to 6 ft S of 18N, and 6 to 8 ft elsewhere. .TONIGHT...SW winds less than 10 kt S of 18N, and SW 15 to 25 kt elsewhere. Seas 3 to 5 ft S of 18N, and 6 to 9 ft elsewhere. .SUN...S of 18N, W winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Elsewhere, NW winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .TONIGHT...N winds less than 10 kt. Seas 3 ft. .SUN...N winds less than 10 kt. Seas 3 ft. .SUN NIGHT...N winds less than 10 kt. Seas 2 ft or less. .MON...NE winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .TUE...E winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .TUE NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .THIS AFTERNOON...N winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...N winds less than 10 kt, shifting to NW after midnight. Seas 3 ft. .SUN...NW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .SUN NIGHT...NW winds less than 10 kt. Seas 2 ft or less. .MON...NW winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 2 ft or less. .TUE...Variable winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .WED...Variable winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...NE winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...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 15 kt. Seas 3 to 4 ft. .MON...E winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds less than 10 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 3 to 5 ft. .WED 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 .THIS AFTERNOON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds less than 10 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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 15 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 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. .MON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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 15 kt. Seas 4 to 6 ft. SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS .SYNOPSIS...A trough over the Bahamas will support scattered thunderstorms today. Tropical Depression Eighteen is in the NW Caribbean near 23.0N 81.8W 1005 mb at 1500 UTC moving NNE at 19 kt. Maximum sustained winds 30 kt gust to 40 kt. The depression is forecast to strengthen to a tropical storm this evening over western Cuba near 23.0N 81.8W quickly moving NE across the Straits of Florida ahead of the cold front, then continue NE near the NW Bahamas near 26.6N 78.5W Sun morning ahead of a cold front moving from the Gulf of Mexico. The tropical storm will move N of the area near 31.5N 74.0W by Sun evening before becoming an extratropical low ahead of the front. The front will follow in the wake of the tropical storm, reaching from Bermuda to the Windward Passage by Mon afternoon, then stalling and weakening through mid week. ATLC waters from 27N to 31N W of 77W ...TROPICAL STORM WARNING... .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 4 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 15 to 25 kt. Seas 5 to 7 ft. .SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 30 to 40 kt, shifting to NW in the afternoon. Seas 8 to 11 ft. .SUN NIGHT...NW winds 20 to 30 kt. Seas 9 to 14 ft. .MON...NW winds 10 to 20 kt. Seas 7 to 10 ft, subsiding to 5 to 7 ft in the afternoon. .MON NIGHT...N winds less than 10 kt. Seas 4 to 6 ft. .TUE...Variable winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W ...TROPICAL STORM WARNING... .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft. .SUN...TROPICAL STORM CONDITIONS EXPECTED. S winds 30 to 40 kt W of 70W, and SE 15 to 25 kt elsewhere. W of 70W, seas 6 to 9 ft, building to 9 to 14 ft in the afternoon. Elsewhere, seas 5 to 7 ft. .SUN NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, SW winds 35 to 45 kt, becoming W 20 to 30 kt after midnight. Elsewhere, S winds 20 to 30 kt. Seas 10 to 15 ft W of 70W, and 7 to 10 ft elsewhere. .MON...NW winds 10 to 20 kt. Seas 8 to 11 ft. .MON NIGHT...N winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 6 to 9 ft. .TUE...NE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .WED...NE winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. Bahamas N of 22N ...TROPICAL STORM WARNING... .THIS AFTERNOON...SE winds 10 to 20 kt. Seas 3 to 4 ft. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 25 to 35 kt. Seas 2 ft or less, building to 3 to 4 ft after midnight. .SUN...TROPICAL STORM CONDITIONS EXPECTED. SW winds 30 to 40 kt. Seas 4 to 6 ft. .SUN NIGHT...NW winds 15 to 25 kt. Seas 3 to 4 ft. .MON...N winds 10 to 15 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...TROPICAL STORM WARNING... .THIS AFTERNOON...E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 5 ft. .TONIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. .SUN...TROPICAL STORM CONDITIONS POSSIBLE. S winds 25 to 35 kt W of 70W, and SE 10 to 20 kt elsewhere. Seas 7 to 10 ft W of 70W, and 5 to 6 ft elsewhere. .SUN NIGHT...W of 70W, SW winds 20 to 30 kt, becoming W 10 to 20 kt after midnight. Elsewhere, S winds 10 to 20 kt. Seas 6 to 9 ft W of 70W, and 5 to 6 ft elsewhere. .MON...W winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...NE 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 5 to 7 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .MON...SW winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 ft. .SUN...E winds less than 10 kt. Seas 5 to 6 ft. .SUN NIGHT...E winds less than 10 kt. Seas 5 to 6 ft. .MON...E winds less than 10 kt. Seas 5 to 6 ft. .MON NIGHT...E winds 10 kt. Seas 5 to 6 ft. .TUE...E winds 10 kt. Seas 5 to 6 ft. .TUE NIGHT...E winds 10 kt. Seas 5 to 6 ft. .WED...E winds 10 kt. Seas 5 to 6 ft. .WED NIGHT...E winds 10 kt. Seas 5 ft.