000 FZNT32 KNHC 170731 OFFN21 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 331 AM EDT Thu Jun 17 2021 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...A broad area of low pressure in the Bay of Campeche will move little today, and little if any development is expected during that time due to interaction with land and unfavorable upper-level winds. However, the low should begin to move northward by this afternoon, and a tropical or subtropical depression is likely to form by late tonight or on Fri when the low moves across the western Gulf of Mexico. This area has a high chance of tropical cyclone formation during the next 48 hours. High pressure is forecast to build in across the basin in the wake of the low later in the upcoming weekend into early next week. Gulf of Mexico N of 26N W of 87W .TODAY...E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. .TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. .FRI...E winds 15 to 25 kt. Seas 7 to 10 ft. .FRI NIGHT...SE winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...SW winds 15 to 25 kt. Seas 7 to 10 ft. .SAT NIGHT...S winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...S winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...S winds 10 to 20 kt. Seas 4 to 5 ft. .MON...S winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. Gulf of Mexico from 22N to 26N W of 87W .TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. .FRI...S winds 15 to 25 kt. Seas 6 to 8 ft. .FRI NIGHT...S winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...S winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .MON...SE winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. SW Gulf of Mexico S of 22N W of 87W .TODAY...NW winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .TONIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...W winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...NW winds less than 10 kt, shifting to SE after midnight. Seas 2 ft or less. .SAT...S winds 10 to 15 kt, shifting to SE in the afternoon. Seas 2 ft or less. .SAT NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .SUN...SE winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...SE winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft after midnight. .MON...SE winds 10 to 20 kt. Seas 3 to 4 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 3 to 4 ft. Gulf of Mexico E of 87W .TODAY...SE winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...S winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .MON...S winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...S winds less than 10 kt, shifting to SE after midnight. Seas 3 to 4 ft.