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 151532
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1032 AM EST Fri Dec 15 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...Strong nocturnal trades along the coast of Colombia
will intensify to gale force beginning tonight, then diminish
slightly each day through Tuesday. Strong NE to E winds will
develop to the lee of Cuba and through and near the Windward
Passage beginning late Saturday night and diminish some on
Tuesday.

NW Caribbean W of 85W

.TODAY...E winds 10 to 15 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. 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 5 to 7 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 20 kt. Seas 6 to 8 ft S of 18N, and 3 to
5 ft elsewhere.
.TONIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft S of 18N, and
3 to 5 ft elsewhere.
.SAT...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 3 to 5 ft elsewhere.
.SAT NIGHT...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere.
.SUN...E winds 15 to 25 kt. Seas 7 to 10 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.MON...E winds 15 to 25 kt. Seas 8 to 11 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.TUE...E winds 15 to 25 kt. Seas 7 to 10 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.

Caribbean from 11N to 15N W of 72W

...GALE WARNING...
...GALE CONDITIONS POSSIBLE SUN NIGHT...

.TODAY...E winds 20 to 30 kt within 90 nm of coast of Colombia,
and E 15 to 25 kt elsewhere. Seas 8 to 11 ft within 90 nm of
coast of Colombia, and 6 to 9 ft elsewhere.
.TONIGHT...E winds 30 to 35 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 12 ft within 90
nm of coast of Colombia, and 7 to 10 ft elsewhere.
.SAT...E winds 25 to 35 kt within 90 nm of coast of Colombia,
and E 15 to 25 kt elsewhere. Seas 8 to 11 ft, except 9 to 13 ft W
of 72W.
.SAT NIGHT...E winds 20 to 30 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 13 ft.
.SUN...E winds 15 to 25 kt. Seas 8 to 13 ft.
.SUN NIGHT...E winds 20 to 30 kt, except 25 to 35 kt W of 72W.
Seas 10 to 15 ft.
.MON...E winds 20 to 30 kt. Seas 10 to 15 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 9 to 13 ft.
.TUE...E winds 15 to 25 kt. Seas 8 to 13 ft.
.TUE NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft.

SW Caribbean S of 11N

.TODAY...NE winds 10 to 20 kt. Seas 5 to 7 ft.
.TONIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.SAT...NE winds 10 to 20 kt. Seas 7 to 10 ft.
.SAT NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft, building to
8 to 13 ft after midnight.
.SUN...NE winds 15 to 25 kt. Seas 8 to 13 ft.
.SUN NIGHT...NE winds 15 to 25 kt. Seas 9 to 14 ft.
.MON...NE winds 15 to 25 kt. Seas 9 to 14 ft.
.MON NIGHT...NE winds 10 to 20 kt. Seas 8 to 12 ft.
.TUE...E winds 10 to 20 kt. Seas 8 to 12 ft.
.TUE NIGHT...NE winds 10 to 20 kt. Seas 8 to 11 ft.

Caribbean between 64W and 72W

.TODAY...E winds 20 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 5 to 7 ft.
.TONIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 5 to 7 ft.
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SAT NIGHT...NE winds 15 to 25 kt. Seas 4 to 6 ft Gulf of
Venezuela, and 6 to 9 ft elsewhere.
.SUN...E winds 15 to 25 kt. Seas 7 to 10 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.MON...E winds 15 to 25 kt. Seas 7 to 10 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TUE...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.

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

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

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

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

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...A frontal trough extending from 23N65W SW to across
the SE Bahamas and to E central Cuba will dissipate by early
Saturday. A weak cold front will move off the NE Florida coast
late this afternoon, reach from Bermuda to central Florida
Saturday, then stall and slowly dissipate along 25N through
early next week as high pres builds eastward across the area.
Winds will become strong from the E over the SW portion and
entrance to the Windward Passage beginning late Saturday night
and through early on Monday, except continuing as strong winds at
the entrance to the Windward Passage through Tuesday night.

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

.TODAY...SW winds 10 to 20 kt. Seas 3 to 5 ft.
.TONIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT...N winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...NE winds 10 kt. Seas 3 ft.
.SUN...E winds 10 kt. Seas 3 ft.
.SUN NIGHT...SE winds less than 10 kt. Seas 3 ft.
.MON...SE winds 10 kt. Seas 3 ft.
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...S winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...SW winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...W winds 10 to 20 kt W of 70W, and SW 15 to 25 kt
elsewhere. Seas 5 to 7 ft.
.SAT...NW winds 10 to 20 kt. Seas 6 to 8 ft.
.SAT NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft W of 70W, and
7 to 10 ft elsewhere.
.SUN...NE winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.MON...E winds less than 10 kt. Seas 4 to 6 ft.
.MON NIGHT...SE winds less than 10 kt. Seas 4 to 6 ft.
.TUE...S winds less than 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft.

Bahamas N of 22N

.TODAY...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight.
.SAT...NE winds 10 to 15 kt. Seas 2 ft or less.
.SAT NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft.
.SUN...E winds 10 to 20 kt. Seas 3 to 5 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...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.TONIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.SAT...NE winds 10 to 15 kt W of 70W, and NE less than 10 kt
elsewhere. Seas 3 to 5 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.SUN...NE winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.
.MON...E winds 10 to 20 kt. Seas 6 to 8 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE...E winds 10 to 15 kt. Seas 6 to 8 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

ATLC waters S of 22N W of 65W

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

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

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



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