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Offshore Waters Forecast (Gulf of Mexico)



000
FZNT24 KNHC 240239
OFFNT4

Offshore Waters Forecast for the Gulf of Mexico
NWS National Hurricane Center Miami, FL
1045 PM EDT Wed Aug 23 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.

GMZ001-241445-
Synopsis for the Gulf of Mexico
1045 PM EDT Wed Aug 23 2017

.SYNOPSIS...Tropical Depression Harvey is centered near 21.9N
92.6W 1002 mb at 11 PM EDT, drifting NW, or 325 degrees at 2 kt. 
Maximum sustained winds are 30 kt gusting to 40 kt. Harvey is 
forecast to intensify to tropical storm near 22.8N 93.1W at 
sunrise on Thu, and continue to gradually strengthen throughout 
Thu and Fri reaching minimal hurricane strength near 26.6N 96.3W 
around sunset on Fri, and move inland Texas near 28.5N 97.5W 
around sunset on Sat. The remnant low of Harvey will move E 
across the northern coastal plains through early next week. 

$$

GMZ011-241445-
NW Gulf including Stetson Bank-
1045 PM EDT Wed Aug 23 2017

...TROPICAL STORM WARNING...

.OVERNIGHT...E winds 10 to 15 kt. Seas 5 ft. 
.THU...NE to E winds 20 to 25 kt. Seas 6 ft, building to 10 ft 
in the afternoon. Scattered showers and isolated thunderstorms. 
.THU NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 
30 kt. Seas 15 to 18 ft. Scattered showers and isolated 
thunderstorms. 
.FRI... TROPICAL STORM CONDITIONS EXPECTED. E winds 35 to 45 kt, 
becoming E to SE 45 to 55 kt in the afternoon. Seas 23 to 25 ft.
Scattered showers and isolated thunderstorms. 
.FRI NIGHT... HURRICANE CONDITIONS POSSIBLE. SE to S winds 50 to 
60 kt. Seas 23 ft, subsiding to 17 ft late. Scattered showers 
and isolated thunderstorms. 
.SAT... TROPICAL STORM CONDITIONS POSSIBLE. 
.SAT NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN... TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. 
.MON... TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...SW to W winds 20 to 25 kt. Seas 6 to 9 ft. 

$$

GMZ013-241445-
N Central Gulf including Flower Garden Banks Marine Sanctuary-
1045 PM EDT Wed Aug 23 2017

.OVERNIGHT...E winds 15 to 20 kt. Seas 6 ft W of 90W, and 3 to
4 ft elsewhere. Scattered showers and isolated thunderstorms. 
.THU...W of 90W, E to SE winds 15 to 20 kt,becoming E 25 to 30 
kt in the afternoon. Elsewhere, E winds 15 to 20 kt. Seas 8 to 
11 ft W of 90W, and 4 ft elsewhere. Scattered showers and 
isolated thunderstorms. 
.THU NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. W of 90W, E to 
SE winds 25 to 30 kt. Seas 13 to 14 ft. Elsewhere, E to SE winds 
15 to 20 kt. Seas 4 to 5 ft. Scattered showers and isolated 
thunderstorms. 
.FRI... TROPICAL STORM CONDITIONS POSSIBLE. W of 90W, SE to S 
winds 25 to 30 kt. Seas 14 to 15 ft. Elsewhere, SE winds 15 to 
20 kt. Seas 6 ft. Scattered showers and isolated thunderstorms. 
.FRI NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. W of 90W, SE 
to S winds 20 to 25 kt. Seas 10 to 12 ft. Elsewhere, SE winds 10 
to 15 kt. Seas 5 ft. Scattered showers and isolated 
thunderstorms. 
.SAT... TROPICAL STORM CONDITIONS POSSIBLE. 
.SAT NIGHT...SE winds 15 to 20 kt. Seas 7 to 8 ft W of 90W, and 
4 to 5 ft elsewhere. 
.SUN...W of 90W, SE to S winds 20 to 25 kt. Seas 6 ft. 
Elsewhere, E to SE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN NIGHT...W of 90W, S winds 20 to 25 kt. Seas 6 ft. 
Elsewhere, SE winds 10 to 15 kt. Seas 3 ft. 
.MON...W of 90W, S winds 25 to 30 kt. Seas 6 to 8 ft. Elsewhere, 
SE winds 10 to 15 kt. Seas 3 ft. 
.MON NIGHT...S winds 20 to 25 kt. Seas 5 to 7 ft. 

$$

GMZ015-241445-
NE Gulf N of 25N E of 87W-
1045 PM EDT Wed Aug 23 2017

.OVERNIGHT...NE winds 5 to 10 kt. Seas 2 ft or less. Scattered
showers and isolated thunderstorms. 
.THU...NE to E winds 5 to 10 kt. Seas 2 ft or less. Scattered
showers and isolated thunderstorms. 
.THU NIGHT...NE winds 5 to 10 kt. Seas 2 ft or less. 
.FRI...E to SE winds 5 to 10 kt, shifting to S to SW in the
afternoon. Seas 2 ft or less. 
.FRI NIGHT...NW winds 5 to 10 kt. Seas 2 ft or less.
.SAT...N to NE winds 5 to 10 kt. Seas 2 ft or less, becoming 3 ft
in the afternoon. 
.SAT NIGHT...NW to N winds 5 to 10 kt. Seas 3 ft. 
.SUN...NW to N winds 5 to 10 kt. Seas 3 ft. 
.SUN NIGHT...NW to N winds 5 to 10 kt. Seas 3 ft. 
.MON...NW to N winds 5 to 10 kt. Seas 3 ft. 
.MON NIGHT...NW to N winds 5 to 10 kt, shifting to E late. Seas
2 ft or less. 

$$

GMZ017-241445-
W Central Gulf from 22N to 26N W of 94W-
1045 PM EDT Wed Aug 23 2017

...TROPICAL STORM WARNING...

.OVERNIGHT...W of 96W, N to NE winds 10 to 15 kt. Seas 5 ft.
Elsewhere, NE winds 25 to 30 kt. Seas 7 to 8 ft. 
.THU... TROPICAL STORM CONDITIONS EXPECTED. N winds 20 to 25 kt 
W of 96W, and N 30 to 35 kt elsewhere. W of 96W, seas 6 ft, 
building to 9 ft in the afternoon. Elsewhere, seas 12 to 14 ft.
Scattered showers and isolated thunderstorms. 
.THU NIGHT... TROPICAL STORM CONDITIONS EXPECTED. W of 96W, NW 
to N winds 25 to 30 kt. Elsewhere, NW to N winds 35 to 40 kt, 
shifting to W 40 to 45 kt late. Seas 11 to 14 ft W of 96W, and 
18 to 20 ft elsewhere. Scattered showers and isolated 
thunderstorms. 
.FRI... TROPICAL STORM CONDITIONS EXPECTED. W of 96W, W winds 35 
to 40 kt,becoming SW 50 to 55 kt in the afternoon,Seas 14 to 15 
ft. Elsewhere, S to SW winds 45 to 55 kt. Seas 21 ft, subsiding 
to 14 ft in the afternoon. Scattered showers and isolated 
thunderstorms. 
.FRI NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. S winds 50 to 
55 kt,becoming SE to S 25 to 30 kt late. Seas 8 to 10 ft. 
Scattered showers and isolated thunderstorms. 
.SAT... TROPICAL STORM CONDITIONS POSSIBLE. 
.SAT NIGHT...SE winds 15 to 20 kt. Seas 5 to 6 ft. 
.SUN...S winds 15 to 20 kt. Seas 5 ft. 
.SUN NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. 
.MON... TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...NW winds 10 to 15 kt, shifting to S to SW late. Seas
3 to 5 ft. 

$$

GMZ019-241445-
Central Gulf from 22N to 26N between 87W and 94W-
1045 PM EDT Wed Aug 23 2017

...TROPICAL STORM WARNING...

.OVERNIGHT...E to SE winds 25 to 30 kt. Seas 9 to 10 ft.
Scattered showers and isolated thunderstorms. 
.THU... TROPICAL STORM CONDITIONS EXPECTED. SE winds 30 to 35 
kt. Seas 12 to 13 ft. Scattered showers and isolated 
thunderstorms. 
.THU NIGHT... TROPICAL STORM CONDITIONS EXPECTED. SE winds 35 to 
40 kt. Seas 8 to 9 ft S of 24N, and 12 to 14 ft elsewhere.
Scattered showers and isolated thunderstorms.
.FRI... TROPICAL STORM CONDITIONS POSSIBLE. SE to S winds 25 to 
30 kt. Seas 7 to 8 ft S of 24N, and 11 to 12 ft elsewhere.
Scattered showers and isolated thunderstorms.
.FRI NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to 
25 kt. Seas 6 to 7 ft. 
.SAT...SE winds 20 to 25 kt. Seas 7 ft. 
.SAT NIGHT...E to SE winds 15 to 20 kt. Seas 5 to 6 ft. 
.SUN...SE to S winds 15 to 20 kt. Seas 5 ft. 
.SUN NIGHT...SE winds 15 to 20 kt. Seas 4 to 5 ft. 
.MON...SE to S winds 15 to 20 kt. Seas 4 to 5 ft. 
.MON NIGHT...SE to S winds 15 to 20 kt. Seas 3 to 5 ft. 

$$

GMZ021-241445-
E Gulf from 22N to 25N E of 87W including Straits of Florida-
1045 PM EDT Wed Aug 23 2017

.OVERNIGHT...E winds 5 to 10 kt. Seas 2 ft or less. 
.THU...S winds 5 to 10 kt. Seas 2 ft or less. 
.THU NIGHT...S to SW winds 5 to 10 kt, shifting to SE 10 to 15 kt
late. Seas 2 ft or less. 
.FRI...SE to S winds 10 to 15 kt. Seas 2 ft or less. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, becoming
3 ft late. 
.SAT...E to SE winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...E winds 5 to 10 kt. Seas 3 ft in the evening,
becoming 2 ft or less. 
.SUN...E winds 5 to 10 kt, shifting to SW to W in the afternoon.
Seas 2 ft or less. 
.SUN NIGHT...N winds 5 to 10 kt. Seas 2 ft or less. 
.MON...S to SW winds 5 to 10 kt. Seas 2 ft or less. 
.MON NIGHT...SW to W winds 5 to 10 kt, shifting to E to SE late.
Seas 2 ft or less. 

$$

GMZ023-241445-
SW Gulf S of 22N W of 94W-
1045 PM EDT Wed Aug 23 2017

.OVERNIGHT...NW to N winds 15 to 20 kt S of 21N W of 95W, and NW
20 to 25 kt elsewhere. Seas 5 ft. 
.THU...W to NW winds 15 to 20 kt S of 21N W of 95W, and W to NW 
20 to 25 kt elsewhere. Seas 7 ft. 
.THU NIGHT...S of 21N W of 95W, NW to N winds 10 to 15 kt, 
shifting to S 5 to 10 kt late. Elsewhere, NW winds 15 to 20 kt, 
shifting to SW late. Seas 6 to 7 ft. 
.FRI...S winds 15 to 20 kt. Seas 6 ft. 
.FRI NIGHT...E to SE winds 15 to 20 kt. Seas 5 ft. Scattered 
showers and isolated thunderstorms. 
.SAT...SE winds 15 to 20 kt. Seas 5 ft. 
.SAT NIGHT...E to SE winds 10 to 15 kt. Seas 4 to 5 ft. 
.SUN...SE winds 10 to 15 kt. Seas 4 ft. 
.SUN NIGHT...E to SE winds 10 to 15 kt. Seas 3 ft. 
.MON...SE to S winds 10 to 15 kt. Seas 3 ft. 
.MON NIGHT...E winds 5 to 10 kt. Seas 3 ft in the evening,
becoming 2 ft or less. 

$$

GMZ025-241445-
E Bay of Campeche including Campeche Bank-
1045 PM241445 EDT Wed Aug 23 2017

.OVERNIGHT...S to SW winds 10 to 15 kt Within 60 nm of coast of
Campeche, and SW to W 20 to 25 kt elsewhere. Seas 5 ft.
Scattered showers and isolated thunderstorms. 
.THU...S to SW winds 15 to 20 kt Within 60 nm of coast of 
Campeche, and SW 25 to 30 kt elsewhere. Seas 6 ft. Scattered 
showers and isolated thunderstorms. 
.THU NIGHT...W winds 15 to 20 kt, shifting to SE to S late. Seas 
5 to 6 ft. Scattered showers and isolated thunderstorms. 
.FRI...SE winds 15 to 20 kt. Seas 5 ft. 
.FRI NIGHT...NE to E winds 15 to 20 kt. Seas 4 to 5 ft.
Scattered showers and isolated thunderstorms. 
.SAT...E to SE winds 15 to 20 kt. Seas 6 ft.
.SAT NIGHT...NE to E winds 15 to 20 kt. Seas 4 to 5 ft. 
.SUN...E to SE winds 15 to 20 kt. Seas 5 ft. 
.SUN NIGHT...NE to E winds 15 to 20 kt. Seas 3 to 4 ft. 
.MON...SE winds 15 to 20 kt. Seas 4 ft.  
.MON NIGHT...NE to E winds 10 to 15 kt. Seas 3 ft in the evening,
becoming 2 ft or less. 

$$

Forecaster Nelson