000 FZNT32 KNHC 200849 OFFN21 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 449 AM EDT Thu Jul 20 2017 Marine Weather HF Voice Broadcast for the Gulf of Mexico 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 the Gulf of Mexico .SYNOPSIS...Weak high pressure will persist across the northern Gulf through Mon night. A thermal trough will develop in the Yucatan Peninsula each evening before pushing offshore into the SW Gulf each night. The trough will drift westward during the overnight hours, and dissipate in the SW Gulf each morning. Gulf of Mexico N of 26N W of 87W .TODAY...Variable winds less than 10 kt. Seas 2 ft or less. .TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .FRI...Variable winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...Variable winds less than 10 kt, becoming S 10 kt after midnight. Seas 2 ft or less. .SAT...S winds 10 kt. Seas 2 ft or less. .SAT NIGHT...S winds 10 kt. Seas 2 ft or less. .SUN...S winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 ft. .MON...S winds 10 to 15 kt, shifting to SE in the afternoon. Seas 3 ft. .MON NIGHT...SE winds less than 10 kt. Seas 3 ft. Gulf of Mexico from 22N to 26N W of 87W .TODAY...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt. Seas 2 ft or less. .FRI...SE winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .SAT...SE winds less than 10 kt. Seas 3 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. SW Gulf of Mexico S of 22N W of 87W .TODAY...Within 60 nm of coast of Veracruz, Variable winds less than 10 kt. Elsewhere, E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft in the morning, subsiding to 2 ft or less. .TONIGHT...E winds less than 10 kt Within 60 nm of coast of Veracruz, and NE 10 to 15 kt elsewhere. Seas 2 ft or less, building to 3 ft after midnight. .FRI...E winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...SE winds less than 10 kt Within 60 nm of coast of Veracruz, and E 10 to 15 kt elsewhere. Seas 2 ft or less. .SAT...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .SAT NIGHT...E 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 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. Gulf of Mexico E of 87W .TODAY...Variable winds less than 10 kt. Seas 2 ft or less. .TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .FRI...Variable winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 2 ft or less. .SAT...S winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .SUN...SE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...E winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less.