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 210908
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
408 AM EST Tue Nov 21 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...A trough will meander over the west-central
Caribbean through al least Thu. A cold front will enter the NW
Caribbean on Thu night, then stall and weaken over the NW
Caribbean Fri. Building high pressure in the wake of the front
will bring increasing northerly winds just off the coast of
Nicaragua Thu night through Sat.

NW Caribbean W of 85W

.TODAY...Variable winds less than 10 kt. Seas 3 to 4 ft.
.TONIGHT...NE winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 to 4 ft.
.WED...Variable winds less than 10 kt. Seas 3 ft.
.WED NIGHT...Variable winds less than 10 kt, becoming NW less
than 10 kt after midnight. Seas 2 ft or less.
.THU...W winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon.
.THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI NIGHT...NW winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 3 to 4 ft.
.SAT...NW winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.SAT NIGHT...N winds less than 10 kt. Seas 2 ft or less.

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. S of 18N, seas 3 to 5 ft. Elsewhere, seas 3 ft in the
evening, subsiding to 2 ft or less.
.WED...S of 18N, E winds 10 to 15 kt. Elsewhere, NE winds less
than 10 kt in the morning, becoming variable winds less than
10 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.WED NIGHT...S of 18N, NE winds 10 to 15 kt. Elsewhere, Variable
winds less than 10 kt, becoming N less than 10 kt after
midnight. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.THU...NE winds less than 10 kt. Seas 3 to 4 ft.
.THU NIGHT...N winds less than 10 kt. Seas 3 ft.
.FRI...N winds 10 to 15 kt. Seas 3 ft.
.FRI NIGHT...N winds 10 to 15 kt. Seas 3 ft.
.SAT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft.

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...Within 90 nm of coast of Colombia, E winds 10 to 15 kt.
Elsewhere, E winds 10 to 15 kt, shifting to NE in the afternoon.
Seas 3 to 5 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.

SW Caribbean S of 11N

.TODAY...NW winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...NW winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 2 ft or less.
.WED...NW winds less than 10 kt. Seas 3 ft.
.WED NIGHT...NW winds less than 10 kt. Seas 3 ft.
.THU...NW winds less than 10 kt. Seas 3 ft.
.THU NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft.
.FRI...NW winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...N winds less than 10 kt. Seas 3 to 5 ft.
.SAT...E winds less than 10 kt, shifting to W in the afternoon.
Seas 3 to 5 ft.
.SAT NIGHT...N winds less than 10 kt. Seas 3 to 5 ft.

Caribbean between 64W and 72W

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Gulf of Venezuela, seas 3 to 4 ft in
the morning, subsiding to 2 ft or less. Elsewhere, seas 4 to
5 ft.
.WED NIGHT...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 5 ft.
.THU...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI...E winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 8 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft.
.THU...E winds 10 to 15 kt. Seas 5 to 7 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft.
.FRI NIGHT...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 10 to 15 kt. Seas 4 to 6 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...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...E winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT...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 10 to 15 kt. Seas 4 to 6 ft.

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...A stationary front extends from 28N65W to SE
Florida. The front will lift northward through midweek. Another
cold front will move off the NE Florida coast on Wed, followed by
a third cold front entering the far NW waters by late Thu. A
surface trough is over the SE waters and will drift NW today and
Wed.

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

.TODAY...SE winds 10 to 20 kt. Seas 6 to 8 ft.
.TONIGHT...SE winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 6 to 8 ft.
.WED...NE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 5 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.
.THU...S winds 10 to 15 kt. Seas 5 to 6 ft.
.THU NIGHT...SW winds less than 10 kt. Seas 5 to 7 ft.
.FRI...W winds less than 10 kt. Seas 5 to 7 ft.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.SAT...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT NIGHT...W winds 10 to 20 kt. Seas 4 to 5 ft.

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

.TODAY...E winds 15 to 25 kt. Seas 7 to 10 ft.
.TONIGHT...SE winds 15 to 25 kt. Seas 7 to 10 ft.
.WED...W of 70W, SW winds 10 to 20 kt, shifting to NW 10 to
15 kt in the afternoon. Elsewhere, SE winds 15 to 25 kt. Seas
7 to 10 ft W of 70W, and 9 to 11 ft elsewhere.
.WED NIGHT...W of 70W, NE winds 10 to 15 kt. Elsewhere, S winds
15 to 25 kt, shifting to NW 10 to 20 kt after midnight. Seas
6 to 8 ft W of 70W, and 8 to 12 ft elsewhere.
.THU...NE winds 10 to 15 kt, shifting to E in the afternoon.
Seas 6 to 9 ft.
.THU NIGHT...S winds less than 10 kt. Seas 5 to 7 ft.
.FRI...SW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 5 to 6 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT...SW winds 10 to 20 kt. Seas 5 to 7 ft.
.SAT NIGHT...W winds 10 to 15 kt. Seas 5 to 7 ft.

Bahamas N of 22N

.TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 to 5 ft.
.WED...Variable winds less than 10 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 ft.
.THU...S winds less than 10 kt. Seas 3 ft.
.THU NIGHT...SW winds less than 10 kt. Seas 2 ft or less.
.FRI...SW winds less than 10 kt. Seas 3 ft.
.FRI NIGHT...SW winds less than 10 kt. Seas 2 ft or less.
.SAT...NW winds less than 10 kt. Seas 2 ft or less, building to
3 ft in the afternoon.
.SAT NIGHT...NW winds less than 10 kt. Seas 3 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TONIGHT...SE winds 10 to 20 kt W of 70W, and SE 15 to 25 kt
elsewhere. Seas 7 to 10 ft.
.WED...W of 70W, S winds 10 to 15 kt, shifting to SW in the
afternoon. Elsewhere, SE winds 10 to 20 kt. Seas 7 to 10 ft.
.WED NIGHT...W of 70W, NW winds less than 10 kt in the evening,
becoming variable winds less than 10 kt. Elsewhere, S winds
10 to 20 kt. Seas 5 to 7 ft W of 70W, and 7 to 10 ft elsewhere.
.THU...S winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 5 to 7 ft.
.THU NIGHT...Variable winds less than 10 kt. Seas 5 to 6 ft.
.FRI...S winds less than 10 kt. Seas 4 to 5 ft.
.FRI NIGHT...S winds less than 10 kt. Seas 4 to 5 ft.
.SAT...S winds 10 kt. Seas 4 to 5 ft.
.SAT NIGHT...SW winds less than 10 kt. Seas 4 to 5 ft.

ATLC waters S of 22N W of 65W

.TODAY...E winds 10 to 15 kt, shifting to SE in the afternoon.
Seas 3 to 5 ft.
.TONIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft.
.WED NIGHT...SE winds less than 10 kt. Seas 4 to 6 ft.
.THU...Variable winds less than 10 kt. Seas 4 to 6 ft.
.THU NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.
.FRI...SE winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...SE winds less than 10 kt. Seas 3 to 5 ft.
.SAT NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.WED...E winds 10 to 20 kt. Seas 7 to 10 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 7 to 9 ft.
.THU...E winds 10 to 15 kt. Seas 7 to 8 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft.
.FRI...E winds 10 kt. Seas 5 to 6 ft.
.FRI NIGHT...E winds 10 kt. Seas 5 to 6 ft.
.SAT...E winds 10 kt. Seas 5 to 6 ft.
.SAT NIGHT...E winds 10 kt. Seas 5 to 6 ft.



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