000 FZNT24 KNHC 180924 OFFNT4 Offshore Waters Forecast for the Gulf of Mexico NWS National Hurricane Center Miami, FL 524 AM EDT Wed Aug 18 2021 Offshore Waters Forecast 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. GMZ001-182130- Synopsis for the Gulf of Mexico 524 AM EDT Wed Aug 18 2021 .SYNOPSIS...Tropical Storm Grace over the northwest Caribbean Sea near 18.8N 80.9W 998 mb at 5 AM EDT moving W at 14 kt. Maximum sustained winds 55 kt gusts 65 kt. Grace will move to 19.3N 83.2W this afternoon, strengthen to a hurricane near 19.9N 86.4W late tonight with maximum sustained winds 75 kt guts 90 kt, and weaken to a tropical storm inland the northern Yucatan Peninsula Thu afternoon with maximum sustained winds 50 kt gusts 60 kt Grace will re-strengthen to a hurricane near 20.7N 93.4W Fri afternoon with maximum sustained winds 65 kt gusts 80 kt, reach to near 20.7N 96.8W late Fri night and move inland late Sat night. Winds and seas will begin to increase across the southeastern Gulf ahead of Grace today. These conditions will shift to west of 90W Thu through late Fri night. $$ GMZ011-182130- NW Gulf including Stetson Bank- 524 AM EDT Wed Aug 18 2021 .TODAY...SE to S winds 10 to 15 kt. Seas 2 to 4 ft. .TONIGHT...SE to S winds 10 to 15 kt. Seas 2 to 4 ft. .THU...SE winds 10 to 15 kt. Seas 2 to 4 ft. .THU NIGHT...E to SE winds 15 to 20 kt. Seas 2 to 4 ft, building to 5 to 7 ft late. .FRI...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in NE swell. .FRI NIGHT...SE winds 15 to 20 kt. Seas 6 to 9 ft in NE swell. .SAT...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in E to SE swell. .SAT NIGHT...E to SE winds 10 to 15 kt. Seas 5 to 7 ft in SE to S swell. .SUN...E to SE winds 10 to 15 kt. Seas 5 to 7 ft in SE swell. $$ GMZ013-182130- N Central Gulf including Flower Garden Banks Marine Sanctuary- 524 AM EDT Wed Aug 18 2021 .TODAY...SE to S winds 10 to 15 kt. Seas 3 ft or less. .TONIGHT...SE winds 15 to 20 kt. Seas 2 to 4 ft. .THU...SE winds 15 to 20 kt. Seas 3 to 5 ft. .THU NIGHT...SE winds 20 to 25 kt. Seas 5 to 7 ft. .FRI...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in E to SE swell. .FRI NIGHT...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in SE to S swell. .SAT...E winds 15 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...E to SE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. $$ GMZ015-182130- NE Gulf N of 25N E of 87W- 524 AM EDT Wed Aug 18 2021 .TODAY...E to SE winds 10 to 15 kt. Seas 2 to 4 ft. .TONIGHT...E to SE winds 15 to 20 kt. Seas 3 to 5 ft. .THU...E to SE winds 15 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...NE to E winds 10 kt. Seas 4 to 6 ft in S swell. .FRI...NE to E winds 10 to 15 kt S of 27N, and variable less than 5 kt elsewhere. Seas 3 to 5 ft. .FRI NIGHT...N to NE winds 10 kt. Seas 3 ft or less. .SAT...NE to E winds 10 kt. Seas 3 ft or less. .SAT NIGHT...E winds 10 kt. Seas 3 ft or less. .SUN...SE winds 10 to 15 kt. Seas 3 ft or less. $$ GMZ017-182130- W Central Gulf from 22N to 26N W of 94W- 524 AM EDT Wed Aug 18 2021 .TODAY...SE to S winds 10 to 15 kt. Seas 2 to 4 ft. .TONIGHT...SE winds 15 to 20 kt. Seas 3 to 5 ft. .THU...E to SE winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 15 to 20 kt. Seas 3 to 5 ft, building to 6 to 8 ft in E swell late. Scattered showers and isolated tstms. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. W of 96W, NE to E winds 15 to 20 kt. Elsewhere, E winds 20 to 25 kt, increasing to 30 to 35 kt in the afternoon. Seas 9 to 13 ft in NE swell. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. .SAT NIGHT...E to SE winds 15 to 20 kt. Seas 7 to 10 ft in E to SE swell. .SUN...E to SE winds 20 to 25 kt, becoming SE 10 to 15 kt in the afternoon. Seas 6 to 8 ft. $$ GMZ019-182130- Central Gulf from 22N to 26N between 87W and 94W- 524 AM EDT Wed Aug 18 2021 ...TROPICAL STORM WARNING... .TODAY...E to SE winds 15 to 20 kt. Seas 2 to 4 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S of 24N, E winds 15 to 20 kt, increasing to 25 to 30 kt late. Elsewhere, E to SE winds 15 to 20 kt. Seas 3 to 5 ft. .THU...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to 35 kt. Seas 8 to 12 ft in NE to E swell. Scattered showers and thunderstorms. .THU NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E to SE winds 30 to 35 kt S of 24N, and E to SE 25 to 30 kt elsewhere. Seas 9 to 14 ft in NE swell. Numerous showers and thunderstorms. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. E to SE winds 30 to 35 kt S of 24N, and E to SE 20 to 25 kt elsewhere. Seas 9 to 14 ft in NE to E swell. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SAT...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in S to SW swell. .SAT NIGHT...E winds 20 to 25 kt. Seas 6 to 8 ft. .SUN...E winds 15 to 20 kt. Seas 5 to 7 ft. $$ GMZ021-182130- E Gulf from 22N to 25N E of 87W including Straits of Florida- 524 AM EDT Wed Aug 18 2021 .TODAY...E winds 15 to 20 kt. Seas 4 to 6 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E to SE winds 25 to 30 kt. Seas 4 to 6 ft, building to 8 to 12 ft in E swell late. .THU...TROPICAL STORM CONDITIONS POSSIBLE. E to SE winds 25 to 30 kt. Seas 9 to 13 ft in E to SE swell. Scattered showers and isolated thunderstorms. .THU NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft in S swell. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. .SAT...E winds 10 to 15 kt. Seas 2 to 4 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 3 ft or less. .SUN...E winds 10 to 15 kt. Seas 3 ft or less. $$ GMZ023-182130- SW Gulf S of 22N W of 94W- 524 AM EDT Wed Aug 18 2021 .TODAY...E to SE winds 10 to 15 kt. Seas 3 ft or less. .TONIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. .THU...E winds 10 kt, shifting to N to NE in the afternoon. Seas 2 to 4 ft. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 10 kt S of 21N W of 95W, and N to NE 15 to 20 kt elsewhere. Seas 3 to 5 ft. Scattered showers and isolated tstms. .FRI...HURRICANE CONDITIONS POSSIBLE. S of 21N W of 95W, NW winds 15 to 20 kt. Elsewhere, NW to N winds 25 to 30 kt, increasing to 60 to 65 kt in the afternoon. Seas 7 to 11 ft in NE swell, building to 13 to 20 ft in NE swell in the afternoon. .FRI NIGHT...HURRICANE CONDITIONS POSSIBLE. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. .SAT NIGHT...E to SE winds 15 to 20 kt. Seas 6 to 9 ft in NE swell. .SUN...SE winds 15 to 20 kt. Seas 5 to 7 ft. $$ GMZ025-182130- E Bay of Campeche including Campeche Bank- 524 AM EDT Wed Aug 18 2021 ...TROPICAL STORM WARNING... .TODAY...E winds 15 to 20 kt. Seas 2 to 4 ft. .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Within 60 nm of coast of Campeche, NE winds 20 to 25 kt. Elsewhere, NE winds 15 to 20 kt, becoming NE to E 25 to 30 kt late. Seas 3 to 5 ft. Scattered showers and thunderstorms E part. .THU...TROPICAL STORM CONDITIONS EXPECTED. Within 60 nm of coast of Campeche, NE to E winds 10 to 15 kt, becoming NW to N 20 to 25 kt in the afternoon. Elsewhere, NE winds 30 to 35 kt. Seas 5 to 7 ft. Scattered showers and isolated thunderstorms. .THU NIGHT...TROPICAL STORM CONDITIONS EXPECTED. Within 60 nm of coast of Campeche, NW winds 45 to 50 kt, becoming S 30 to 35 kt late. Elsewhere, NE winds 40 to 45 kt. Seas 9 to 13 ft in N to NE swell. Numerous showers and thunderstorms. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. Within 60 nm of coast of Campeche, SE to S winds 25 to 30 kt, diminishing to 10 to 15 kt in the afternoon. Elsewhere, SE to S winds 50 to 55 kt. Seas 12 to 19 ft in NE swell. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .SAT...E to SE winds 20 to 25 kt. Seas 6 to 8 ft. .SAT NIGHT...E winds 20 to 25 kt. Seas 6 to 8 ft. .SUN...E winds 15 to 20 kt. Seas 5 to 7 ft. $$ Forecaster Aguirre