000
FZNT31 KNHC 170948
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
448 AM EST Sun Dec 17 2023

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 Atlantic from
07N to 19N between 55W and 64W

.SYNOPSIS...Strong high pressure across the western Atlantic
along 34N will support fresh trade winds across the
north-central and northeast basin today, before the high
pressure shifts E and weakens, causing winds to gradually
diminish Sun night. A cold front has reached the Yucatan Channel
and will move SE into the NW Caribbean this morning, stretch
from eastern Cuba to Costa Rica Mon morning, then stall and
weaken from central Hispaniola to Panama by early Wed. Fresh to
strong NW to N winds will follow this front, becoming N to NE
Tue night through Thu. 

NW Caribbean W of 85W

.TODAY...NW winds 15 to 25 kt. Seas 6 to 9 ft. 
.TONIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.MON...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.MON NIGHT...N winds 10 to 15 kt. Seas 5 to 7 ft. 
.TUE...N winds 10 to 15 kt. Seas 5 to 7 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.WED NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.THU...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

Caribbean N of 15N between 72W and 85W

.TODAY...S winds 10 to 20 kt S of 18N, and W 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.TONIGHT...NW winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE...N winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.WED...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

Caribbean from 11N to 15N W of 72W

.TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 15 kt within 90 nm of coast of
Colombia, and NE 15 to 25 kt elsewhere. Seas 5 to 7 ft. 
.MON...E winds 10 kt within 90 nm of coast of Colombia, and NE
15 to 25 kt elsewhere. Seas 5 to 7 ft. 
.MON NIGHT...NE winds 10 to 15 kt within 90 nm of coast of
Colombia, and N 15 to 25 kt elsewhere. Seas 4 to 5 ft within
90 nm of coast of Colombia, and 6 to 8 ft elsewhere. 
.TUE...N winds 15 to 25 kt. Seas 6 to 9 ft. 
.TUE NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.WED...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.THU...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. 

SW Caribbean S of 11N

.TODAY...N winds less than 10 kt. Seas 3 to 5 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...N winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.TUE...N winds 10 to 20 kt. Seas 6 to 9 ft. 
.TUE NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft. 
.WED...N winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED NIGHT...N winds 10 to 20 kt. Seas 6 to 8 ft.
.THU...N winds 10 to 15 kt. Seas 6 to 7 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 6 to 7 ft. 

Caribbean between 64W and 72W

.TODAY...E winds 10 to 15 kt. Seas 3 ft Gulf of Venezuela, and
5 to 7 ft elsewhere. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of
Venezuela, and 6 to 8 ft elsewhere. 
.MON...E winds 10 to 15 kt. Seas 3 ft Gulf of Venezuela, and
5 to 7 ft elsewhere. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of
Venezuela, and 5 to 7 ft elsewhere. 
.TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. 
.WED...NE winds less than 10 kt. Seas 3 to 5 ft. 
.WED NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.THU...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

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

.TODAY...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft. 
.TUE...NE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 6 to 9 ft. 
.TUE NIGHT...NE winds less than 10 kt. Seas 7 to 10 ft. 
.WED...Variable winds less than 10 kt. Seas 7 to 10 ft. 
.WED NIGHT...NE winds less than 10 kt. Seas 6 to 9 ft. 
.THU...E winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 6 to 9 ft. 
.THU NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. 

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

.TODAY...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON...E winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.TUE...NE winds 10 to 15 kt, shifting to E in the afternoon.
Seas 5 to 7 ft. 
.TUE NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. 
.WED...E winds less than 10 kt. Seas 6 to 8 ft. 
.WED NIGHT...E winds less than 10 kt. Seas 6 to 8 ft. 
.THU...E winds less than 10 kt. Seas 6 to 8 ft. 
.THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 5 to 7 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A stationary front extends from 22N55W W-NW to just
north of the NW Bahamas and then across central Florida as a
warm front. This front will weaken and become ill defined today.
Strong to gale-force SE winds are noted N of this boundary N of 
26N and W of 74W early this morning, including the NW Bahamas and
offshore NE Florida. Deepening low pressure in the NE Gulf of 
Mexico will move NE and into Florida soon, then move across the 
far NW Atlantic waters Sun afternoon and N of the area Sun night,
dragging a cold front with it. SE gales will expand offshore 
Florida today, ahead of the low, then spread E and NE with time, 
ahead of the cold front. Behind the front, NW gales will also 
develop N of 27.5N by Sun evening. Scattered to numerous strong 
thunderstorms are expected ahead of the low and the cold front 
through Sun night. The cold front will reach 31N79W to Central 
Cuba by Sun evening, then extend from 31N68W to central 
Hispaniola by Mon evening. The front will then move slowly E into
the middle of next week as high pressure builds behind it.

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

...GALE WARNING...

.TODAY...S winds 30 to 40 kt. Seas 16 to 21 ft. 
.TONIGHT...W winds 25 to 35 kt. Seas 14 to 19 ft. 
.MON...W winds 15 to 25 kt. Seas 12 to 17 ft, subsiding to 9 to
14 ft in the afternoon. 
.MON NIGHT...NW winds 15 to 25 kt. Seas 8 to 11 ft. 
.TUE...N winds 15 to 20 kt. Seas 8 to 11 ft. 
.TUE NIGHT...NE winds 15 to 20 kt. Seas 8 to 10 ft. 
.WED...NE winds 15 to 20 kt. Seas 8 to 10 ft. 
.WED NIGHT...NE winds 15 to 20 kt. Seas 7 to 9 ft. 
.THU...NE winds 10 to 15 kt. Seas 7 to 9 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 7 to 9 ft. 

ATLC waters from 27N to 31N between 65W and 77W

...GALE WARNING...

.TODAY...SE winds 25 to 35 kt W of 70W, and SE 20 to 30 kt
elsewhere. Seas 13 to 18 ft W of 70W, and 9 to 14 ft elsewhere. 
.TONIGHT...S winds 25 to 35 kt. Seas 15 to 20 ft W of 70W, and
12 to 17 ft elsewhere. 
.MON...W of 70W, W winds 20 to 30 kt, diminishing to 10 to 20 kt
in the afternoon. Elsewhere, S winds 25 to 35 kt. Seas 14 to
19 ft. 
.MON NIGHT...W winds 10 to 15 kt W of 70W, and S 20 to 30 kt
elsewhere. Seas 11 to 16 ft W of 70W, and 12 to 17 ft elsewhere.
.TUE...NW winds 10 to 20 kt. Seas 10 to 15 ft. 
.TUE NIGHT...N winds 15 to 25 kt. Seas 10 to 13 ft.
.WED...N winds 15 to 25 kt. Seas 10 to 15 ft. 
.WED NIGHT...N winds 15 to 25 kt. Seas 10 to 15 ft. 
.THU...N winds 15 to 25 kt. Seas 10 to 15 ft. 
.THU NIGHT...N winds 10 to 20 kt. Seas 9 to 14 ft. 

Bahamas N of 22N

...GALE WARNING...

.TODAY...S winds 25 to 35 kt. Seas 7 to 10 ft. 
.TONIGHT...W winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON...NW winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE...N winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.WED...NE winds 15 to 25 kt. Seas 6 to 8 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.THU...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

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

...GALE WARNING...

.TODAY...SE winds 25 to 35 kt. Seas 11 to 15 ft W of 70W, and
9 to 12 ft elsewhere. 
.TONIGHT...SE winds 20 to 30 kt. Seas 11 to 15 ft. 
.MON...W of 70W, W winds 15 to 25 kt, diminishing to 10 to 15 kt
in the afternoon. Elsewhere, SE winds 15 to 25 kt. Seas 9 to
14 ft. 
.MON NIGHT...SW winds 10 to 20 kt, shifting to N after midnight.
Seas 9 to 12 ft. 
.TUE...NE winds 10 to 20 kt. Seas 8 to 12 ft. 
.TUE NIGHT...N winds 10 to 20 kt. Seas 8 to 11 ft. 
.WED...N winds 15 to 25 kt. Seas 10 to 13 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 11 to 15 ft. 
.THU...N winds 15 to 20 kt. Seas 11 to 14 ft. 
.THU NIGHT...N winds 10 to 15 kt. Seas 10 to 12 ft. 

ATLC waters S of 22N W of 65W

.TODAY...SE winds 15 to 25 kt. Seas 7 to 10 ft. 
.TONIGHT...SE winds 15 to 25 kt. Seas 7 to 10 ft. 
.MON...SE winds 10 to 20 kt. Seas 6 to 9 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. 
.TUE...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED...N winds 10 to 20 kt. Seas 7 to 10 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 ft. 
.THU...NE winds 10 to 20 kt. Seas 8 to 13 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 8 to 11 ft. 

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

.TODAY...NE winds 15 to 20 kt. Seas 8 to 11 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 9 to 11 ft. 
.MON...E winds 15 to 20 kt. Seas 9 to 12 ft. 
.MON NIGHT...NE winds 15 to 20 kt. Seas 9 to 13 ft. 
.TUE...NE winds 10 to 15 kt. Seas 9 to 13 ft. 
.TUE NIGHT...N winds 10 kt. Seas 9 to 13 ft. 
.WED...NW winds less than 10 kt, shifting to W in the afternoon.
Seas 10 to 12 ft. 
.WED NIGHT...NW winds 10 to 15 kt. Seas 9 to 11 ft. 
.THU...NW winds 10 to 15 kt. Seas 8 to 12 ft. 
.THU NIGHT...N winds 10 to 15 kt. Seas 8 to 12 ft.