Offshore Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
000
FZNT31 KNHC 180901
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
501 AM EDT Fri Aug 18 2017

Marine Weather HF Voice Broadcast for the Tropical N Atlantic
from 07N to 22N between 55W and 64W, the SW N Atlantic S of
31N W of 65W including Bahamas, and the Caribbean Sea.

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 Caribbean Sea and Tropical N ATLC from 07N to 19N
between 55W and 64W

.SYNOPSIS...Tropical Storm Harvey is centered near 13.1N 59.1W
1004 mb at 5 am EDT moving W at 16 kt. Maximum sustained winds
35kt with gusts to 45 kt. Harvey will enter the eastern
Caribbean and move to 13.2N 61.7W by this afternoon, 13.5N 65.2W
tonight, 13.9N 68.8W Sat afternoon, 14.1N 72.7W Sat night, 15.0N
80.2W Sun night, 16.5N 86.5W Mon night as strong tropical storm,
before making landfall in Belize and moving inland to 17.5N
90.0W by Tue night.

NW Caribbean W of 85W

.TODAY...NE winds 10 to 15 kt. Seas 3 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 3 ft.
.SAT...NE winds 10 to 15 kt. Seas 3 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
.SUN...E winds less than 10 kt. Seas 3 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight.
.MON... TROPICAL STORM CONDITIONS POSSIBLE.
.MON NIGHT... TROPICAL STORM CONDITIONS POSSIBLE.
.TUE... TROPICAL STORM CONDITIONS POSSIBLE.

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 20 kt. S of 18N, seas 4 to 6 ft. Elsewhere,
seas 3 to 4 ft in the morning, subsiding to 2 ft or less.
.SAT NIGHT... TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to
30 kt S of 18N, and E 15 to 25 kt elsewhere. S of 18N, seas 4 to
6 ft. Elsewhere, seas 2 ft or less, building to 3 ft after
midnight.
.SUN... TROPICAL STORM CONDITIONS POSSIBLE. S of 18N, NE winds
30 to 40 kt, becoming E 40 to 50 kt in the afternoon. Elsewhere,
E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT... TROPICAL STORM CONDITIONS POSSIBLE.
.MON... TROPICAL STORM CONDITIONS POSSIBLE.
.MON NIGHT... TROPICAL STORM CONDITIONS POSSIBLE.
.TUE... TROPICAL STORM CONDITIONS POSSIBLE.

Caribbean from 11N to 15N W of 72W

...TROPICAL STORM WARNING...

.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...NE winds 10 to 20 kt. Seas 4 to 5 ft.
.SAT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...Within 90 nm of coast of Colombia, E winds less
than 10 kt. Elsewhere, NE winds 15 to 25 kt, increasing to 40 to
50 kt after midnight. Seas 4 to 6 ft.
.SUN... TROPICAL STORM CONDITIONS POSSIBLE. S winds 10 kt within
90 nm of coast of Colombia, and E 45 to 55 kt elsewhere. Seas
5 to 7 ft.
.SUN NIGHT... TROPICAL STORM CONDITIONS POSSIBLE.
.MON... TROPICAL STORM CONDITIONS POSSIBLE.
.MON NIGHT... TROPICAL STORM CONDITIONS POSSIBLE.
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft.

SW Caribbean S of 11N

.TODAY...NE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.TONIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...N winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.SAT NIGHT...N winds less than 10 kt, shifting to W after
midnight. Seas 3 to 4 ft.
.SUN...SW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 to 4 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft.
.MON...S winds less than 10 kt, shifting to NW in the afternoon.
Seas 3 to 5 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE...N winds 10 to 15 kt. Seas 3 to 4 ft.

Caribbean between 64W and 72W

...TROPICAL STORM WARNING...

.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...Gulf of Venezuela, NE winds 10 to 15 kt. Elsewhere,
NE winds 20 to 30 kt, increasing to 30 to 40 kt after midnight.
Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere.
.SAT...NE winds 10 kt Gulf of Venezuela, and E 30 to 40 kt
elsewhere. Seas 3 ft Gulf of Venezuela, and 6 to 9 ft elsewhere.
.SAT NIGHT...NE winds 10 kt Gulf of Venezuela, and E 40 to 50 kt
elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 6 to 9 ft
elsewhere.
.SUN...NE winds less than 10 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft
elsewhere.
.SUN NIGHT...E winds less than 10 kt Gulf of Venezuela, and E
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
4 to 6 ft elsewhere.
.MON...Gulf of Venezuela, SE winds less than 10 kt, shifting to
E in the afternoon. Elsewhere, E winds 10 to 20 kt. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere.
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft.

Offshore Leeward Islands and adjacent ATLC waters from 15N to
19N W of 55W

.TODAY...E winds 15 to 25 kt. Seas 7 to 10 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft.
.SAT...E winds 15 to 25 kt. Seas 6 to 8 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SUN...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...SE winds 10 to 20 kt. Seas 5 to 7 ft.
.MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft.

Offshore Windward Islands and adjacent ATLC waters from 07N to
15N W of 55W

...TROPICAL STORM WARNING...

.TODAY...SE winds 25 to 35 kt. Seas 5 to 7 ft.
.TONIGHT...SE winds 25 to 35 kt. Seas 5 to 7 ft.
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SUN...E winds 10 to 20 kt. Seas 4 to 5 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft.

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...The northern part of a strong tropical wave is
moving across the southern Bahamas will continue W and reach the
Straits of Florida early Sat, accompanied by fresh to locally
strong winds and very active weather. Low pressure in the
tropical Atlc will pass N of the Leeward Islands late Sat,
possibly as a tropical cyclone, and reach the southern Bahamas by
early Mon bringing strong winds and building seas to the waters
S of 25N. A ridge along 28N will move N of the area early next
week.

ATLC waters from 27N to 31N W of 77W

.TODAY...S winds 10 to 15 kt. Seas 3 ft.
.TONIGHT...S winds 10 to 20 kt. Seas 3 to 4 ft.
.SAT...S winds 10 to 15 kt. Seas 3 to 4 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 20 kt. Seas 3 to 4 ft.
.MON...SE winds 10 to 20 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft.

ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W

.TODAY...S winds 10 to 15 kt. Seas 3 to 4 ft.
.TONIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE...NE winds 10 to 15 kt. Seas 4 to 6 ft.

Bahamas N of 22N

.TODAY...E winds 10 to 20 kt. Seas 3 to 4 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft.
.SAT...SE winds 10 to 20 kt. Seas 3 to 4 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft.
.SUN...E winds 10 to 20 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TUE...SE winds 10 to 20 kt. Seas 3 to 5 ft.

ATLC waters from 22N to 27N between 65W and the Bahamas

.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 20 kt W of 70W, and E 15 to 25 kt
elsewhere. Seas 5 to 7 ft.
.SUN...E winds 10 to 20 kt W of 70W, and E 15 to 25 kt
elsewhere. Seas 6 to 9 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft.
.MON...E winds 15 to 25 kt. Seas 6 to 9 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE...E winds 10 to 20 kt. Seas 6 to 8 ft.

ATLC waters S of 22N W of 65W

.TODAY...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SAT NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.SUN...E winds 15 to 25 kt. Seas 6 to 8 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 20 kt. Seas 5 to 7 ft.

ATLC waters from 19N to 22N between 55W and 65W

.TODAY...E winds 15 to 20 kt. Seas 6 to 8 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft.
.SAT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.SAT NIGHT...E winds 15 to 25 kt. Seas 7 to 9 ft.
.SUN...E winds 15 to 25 kt. Seas 7 to 9 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 7 to 8 ft.
.MON...E winds 15 to 25 kt. Seas 6 to 8 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE...SE winds 10 to 20 kt. Seas 5 to 7 ft.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.