000 FZNT24 KNHC 072048 OFFNT4 Offshore Waters Forecast for the Gulf of Mexico NWS National Hurricane Center Miami, FL 448 PM EDT Thu Sep 7 2017 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. GMZ001-080900- Synopsis for the Gulf of Mexico 448 PM EDT Thu Sep 7 2017 .SYNOPSIS...Hurricane Katia near 21.6N 94.6W 980 mb at 5 PM EDT stationary. Maximum sustained winds 70 kt gusts 85 kt. Katia is forecast to move to near 21.3N 95.0W late tonight, then to near 20.9N 95.6W Fri afternoon, then to near 20.3N 96.7W late Fri night, then moving inland near 19.5N 97.6W by Sat afternoon while weakening to a tropical storm, dissipating by Sun afternoon. Major Hurricane Irma is forecast to enter the eastern Straits of Florida Sat afternoon, then turn northward across the Florida peninsula Sat night and Sun, bringing tropical storm force winds to eastern portions of the Straits of Florida and Florida Bay in the far SE Gulf late Sat into Sun. $$ GMZ011-080900- NW Gulf including Stetson Bank- 448 PM EDT Thu Sep 7 2017 .TONIGHT...NE winds 15 to 20 kt. Seas 7 ft. .FRI...NE to E winds 15 to 20 kt. Seas 8 ft. Scattered showers and isolated thunderstorms. .FRI NIGHT...NE to E winds 15 to 20 kt. Seas 8 ft. .SAT...NE winds 15 to 20 kt. Seas 7 ft. .SAT NIGHT...NE winds 15 to 20 kt. Seas 6 ft. .SUN...NE winds 15 kt. Seas 5 to 6 ft. .SUN NIGHT...N to NE winds 15 to 20 kt. Seas 6 ft. .MON...N to NE winds 15 to 20 kt. Seas 6 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 6 ft. .TUE...NW to N winds 5 to 10 kt. Seas 5 ft. $$ GMZ013-080900- N Central Gulf including Flower Garden Banks Marine Sanctuary- 448 PM EDT Thu Sep 7 2017 .TONIGHT...NE to E winds 15 to 20 kt. Seas 6 to 7 ft. .FRI...NE to E winds 15 to 20 kt. Seas 7 to 8 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 7 ft. .SAT...NE winds 15 to 20 kt. Seas 7 ft. .SAT NIGHT...NE winds 20 to 25 kt. Seas 8 to 9 ft. .SUN...NE winds 20 to 25 kt. Seas 9 ft. .SUN NIGHT...N to NE winds 20 to 25 kt. Seas 10 ft. .MON...N winds 20 to 25 kt. Seas 8 to 10 ft. .MON NIGHT...NW to N winds 15 to 20 kt. Seas 7 ft. .TUE...NW winds 10 to 15 kt. Seas 4 to 5 ft. $$ GMZ015-080900- NE Gulf N of 25N E of 87W- 448 PM EDT Thu Sep 7 2017 ...HURRICANE CONDITIONS POSSIBLE SUN AND SUN NIGHT... .TONIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. .FRI...NE winds 15 to 20 kt. Seas 4 to 5 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 5 to 6 ft. Scattered showers and isolated thunderstorms. .SAT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 25 kt. Seas 7 to 8 ft. Scattered showers and isolated thunderstorms. .SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N to NE winds 30 to 35 kt. Seas 10 to 11 ft. Scattered showers and isolated thunderstorms. .SUN...HURRICANE CONDITIONS POSSIBLE. .SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. .MON...TROPICAL STORM CONDITIONS POSSIBLE. .MON NIGHT...NW winds 20 to 25 kt. Seas 7 to 9 ft. .TUE...SW to W winds 15 to 20 kt. Seas 5 to 6 ft. $$ GMZ017-080900- W Central Gulf from 22N to 26N W of 94W- 448 PM EDT Thu Sep 7 2017 ...TROPICAL STORM WARNING... .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 96W, N to NE winds 20 to 25 kt. Elsewhere, NE winds 45 to 50 kt, shifting to NE to E 35 to 40 kt late. Seas 9 to 10 ft W of 96W, and 12 to 13 ft elsewhere. Scattered showers and isolated thunderstorms. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 25 to 30 kt. Seas 10 to 11 ft. Scattered showers and isolated thunderstorms. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE to E winds 15 to 20 kt. Seas 8 to 9 ft. .SAT...NE winds 15 to 20 kt. Seas 7 ft. Scattered showers and isolated thunderstorms. .SAT NIGHT...N to NE winds 15 to 20 kt. Seas 6 ft. Scattered showers and isolated thunderstorms. .SUN...N to NE winds 15 to 20 kt. Seas 5 ft. .SUN NIGHT...N to NE winds 15 to 20 kt. Seas 6 ft. .MON...N winds 10 to 15 kt. Seas 6 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 7 ft. .TUE...NW to N winds 5 to 10 kt. Seas 5 to 6 ft. $$ GMZ019-080900- Central Gulf from 22N to 26N between 87W and 94W- 448 PM EDT Thu Sep 7 2017 .TONIGHT...NE to E winds 25 to 30 kt S of 24N, and NE to E 10 to 15 kt elsewhere. Seas 7 ft. .FRI...NE to E winds 15 to 20 kt. Seas 7 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 6 to 7 ft. .SAT...NE winds 15 to 20 kt. Seas 7 ft. .SAT NIGHT...N to NE winds 20 to 25 kt. Seas 7 to 8 ft. .SUN...N to NE winds 20 to 25 kt. Seas 8 ft. .SUN NIGHT...N to NE winds 20 to 25 kt. Seas 8 ft. .MON...N winds 15 to 20 kt. Seas 8 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 7 ft. .TUE...NW winds 5 to 10 kt. Seas 5 to 6 ft. $$ GMZ021-080900- E Gulf from 22N to 25N E of 87W including Straits of Florida- 448 PM EDT Thu Sep 7 2017 ...TROPICAL STORM WARNING... ...HURRICANE CONDITIONS POSSIBLE SAT NIGHT AND SUN... .TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft late. .FRI...NE winds 10 to 15 kt. Seas 4 to 5 ft. Scattered showers and isolated thunderstorms. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N to NE winds 20 to 25 kt. Seas 5 to 6 ft. .SAT...TROPICAL STORM CONDITIONS EXPECTED. Straits of Florida, N to NE winds 35 to 40 kt, becoming N 45 to 50 kt in the afternoon. Elsewhere, N to NE winds 20 to 25 kt. Seas 7 to 9 ft. .SAT NIGHT...HURRICANE CONDITIONS POSSIBLE. Straits of Florida, NW to N winds 50 to 60 kt. Seas 15 to 19 ft. Elsewhere, N winds 25 to 30 kt. Seas 10 to 12 ft. Scattered showers and isolated thunderstorms. .SUN...HURRICANE CONDITIONS POSSIBLE. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .MON...NW winds 15 to 20 kt. Seas 8 to 10 ft. .MON NIGHT...NW winds 15 to 20 kt. Seas 6 to 7 ft. .TUE...SW to W winds 5 to 10 kt. Seas 5 ft. $$ GMZ023-080900- SW Gulf S of 22N W of 94W- 448 PM EDT Thu Sep 7 2017 ...HURRICANE WARNING... .TONIGHT...HURRICANE CONDITIONS EXPECTED. S of 21N W of 95W, W to NW winds 30 to 35 kt. Seas 11 to 12 ft. Elsewhere, W to NW winds 60 to 70 kt. Seas 20 ft. Scattered showers and isolated thunderstorms. VSBY 1 NM or less. .FRI...HURRICANE CONDITIONS EXPECTED. S of 21N W of 95W, W to NW winds 45 to 50 kt, becoming W 60 to 70 kt in the afternoon. Seas 15 ft, building to 20 ft in the afternoon. Elsewhere, W winds 60 to 70 kt, shifting to S 65 to 75 kt in the afternoon. Seas 20 to 21 ft. Scattered showers and isolated thunderstorms. VSBY 1 NM or less. .FRI NIGHT...HURRICANE CONDITIONS EXPECTED. S of 21N W of 95W, W winds 65 to 75 kt, shifting to S late. Seas 18 to 21 ft. Elsewhere, E to SE winds 60 to 70 kt, becoming E 35 to 40 kt late. Seas 17 ft, subsiding to 12 ft late. Scattered showers and isolated thunderstorms. .SAT...TROPICAL STORM CONDITIONS EXPECTED. S of 21N W of 95W, E to SE winds 55 to 60 kt, becoming N 5 to 10 kt in the afternoon. Elsewhere, NE winds 15 to 20 kt. Seas 8 ft, subsiding to 5 ft in the afternoon. Scattered showers and isolated thunderstorms. .SAT NIGHT...N winds 10 to 15 kt. Seas 4 ft. Scattered showers and isolated thunderstorms. .SUN...N winds 10 to 15 kt. Seas 5 ft. .SUN NIGHT...N winds 15 to 20 kt. Seas 5 ft. .MON...NW to N winds 15 to 20 kt. Seas 6 ft. .MON NIGHT...NW to N winds 15 to 20 kt. Seas 6 ft. .TUE...NW winds 10 to 15 kt. Seas 5 to 6 ft. $$ GMZ025-080900- E Bay of Campeche including Campeche Bank- 448 PM EDT Thu Sep 7 2017 ...TROPICAL STORM WARNING... .TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Within 60 nm of coast of Campeche, W to NW winds 5 to 10 kt, shifting to N to NE late. Elsewhere, SW to W winds 35 to 40 kt, becoming NE to E 25 to 30 kt late. Seas 5 ft Within 60 nm of coast of Campeche, and 10 to 11 ft elsewhere. Scattered showers and isolated thunderstorms. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. Within 60 nm of coast of Campeche, E winds 5 to 10 kt, shifting to SE to S in the afternoon. Elsewhere, SE winds 20 to 25 kt. Seas 5 ft Within 60 nm of coast of Campeche, and 8 to 9 ft elsewhere. Scattered showers and isolated thunderstorms. .FRI NIGHT...N to NE winds 10 to 15 kt. Seas 7 ft. .SAT...NE winds 5 to 10 kt. Seas 5 ft. .SAT NIGHT...N to NE winds 10 to 15 kt. Seas 4 ft. Scattered showers and isolated thunderstorms. .SUN...N winds 10 to 15 kt. Seas 4 ft. .SUN NIGHT...N winds 10 to 15 kt. Seas 3 ft Within 60 nm of coast of Campeche, and 5 to 6 ft elsewhere. .MON...N winds 10 to 15 kt. Seas 3 ft Within 60 nm of coast of Campeche, and 6 ft elsewhere. .MON NIGHT...NW to N winds 10 to 15 kt. Seas 6 ft. .TUE...NW winds 5 to 10 kt. Seas 5 ft. $$ Forecaster Lewitsky