559 
FZNT31 KNHC 191421
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1021 AM EDT Wed Mar 19 2025

Marine Weather HF Voice Broadcast for the Tropical N Atlantic
from 07N to 19N W of 55W, the N Atlantic from 19N to
31N W of 55W including the 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 W of 55W

.SYNOPSIS...Moderate to fresh trades in the eastern, central and
portions of the southwest Caribbean will reach fresh to strong
speeds Fri evening, continuing through early next week as high
pressure builds near the Bahamas in the wake of a cold front.
The resultant pressure gradient between the associated ridge and
lower pressure over Colombia will lead to the development of
near gale-force winds across the south-central waters late Sat
through early next week, with pulsing gales at night offshore
Colombia. Rough to very rough seas are expected with the
strongest winds late Sat through Mon. Fresh NE winds in the
Windward Passage and the lee of Cuba will diminish Thu morning.
Looking ahead, the tail of a cold front will enter the NW
Caribbean early Fri and dissipate Fri evening. The
aforementioned building high pressure will result in fresh to
strong NE winds resuming in the Windward Passage and the lee of
Cuba Fri evening through Sun night, and east winds of the same
speed in the Gulf of Honduras Sun evening. 

NW Caribbean W of 85W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. 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 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 5 to 7 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds 10 to
15 kt, diminishing to less than 10 kt in the afternoon. Seas
3 to 4 ft. 
.THU NIGHT...S of 18N, NE winds 10 to 15 kt. Elsewhere, NE winds
less than 10 kt, shifting to N after midnight. Seas 3 to 5 ft S
of 18N, and 2 ft or less elsewhere. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI NIGHT...NE 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. 

Caribbean from 11N to 15N W of 72W

...GALE CONDITIONS POSSIBLE AT NIGHT SAT AND SUN...

.THIS AFTERNOON...NE winds 15 to 20 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 3 to 5 ft. 
.TONIGHT...NE winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. 
.THU...NE winds 15 to 25 kt within 90 nm of coast of Colombia,
and NE 10 to 20 kt elsewhere. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 10 to 20 kt elsewhere. Seas 5 to 7 ft. 
.FRI...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...NE winds 15 to 25 kt. Seas 6 to 8 ft. 
.SAT...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NE winds 20 to 35 kt. Seas 8 to 11 ft. 
.SUN...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.SUN NIGHT...E winds 20 to 35 kt. Seas 8 to 13 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 4 to 6 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. 
.FRI...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 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. 
.SUN...NE winds 15 to 25 kt. Seas 8 to 11 ft. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 8 to 13 ft. 

Caribbean between 64W and 72W

.THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU...E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of Venezuela,
and 4 to 6 ft elsewhere. 
.THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E 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. 

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

.THIS AFTERNOON...S winds less than 10 kt. Seas 4 to 6 ft. 
.TONIGHT...S winds less than 10 kt. Seas 3 to 5 ft. 
.THU...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft. 
.THU NIGHT...E winds less than 10 kt. Seas 6 to 9 ft. 
.FRI...E winds less than 10 kt, shifting to SE in the afternoon.
Seas 6 to 9 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 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. 

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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...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 6 to 8 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E 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. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Near to gale-force WNW winds and rough to very rough
seas associated with a complex low pressure system located near 
Bermuda will continue to affect the offshore waters NE and E of
the Bahamas through early tonight. Afterward, winds and seas
will start to diminish as the broad non-tropical system moves E 
and then lift N of the area Thu evening. Fresh to strong 
southerly winds will develop over the NE Florida offshore waters 
on Thu afternoon ahead of a strong cold front forecast to enter 
the NW offshore waters Thu evening. Strong to near gale-force NW 
winds and rough to very rough seas will follow this front, which 
is forecast to reach from 31N71W to Andros Island and W Cuba Fri 
morning, and from 31N57W to the southern Bahamas Sat morning 
where it stall before dissipating late Sat. High pressure will 
build NE to E of the Bahamas in the wake of the front the 
remainder weekend. 

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

.THIS AFTERNOON...N winds 10 to 15 kt. Seas 6 to 9 ft. 
.TONIGHT...NW winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 7 to 10 ft. 
.THU...SW winds 10 to 20 kt. Seas 6 to 9 ft. 
.THU NIGHT...W winds 20 to 30 kt. Seas 7 to 10 ft. 
.FRI...NW winds 15 to 25 kt. Seas 8 to 12 ft. 
.FRI NIGHT...N winds 10 to 15 kt in the evening, becoming
variable winds less than 10 kt. Seas 6 to 9 ft. 
.SAT...SW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 4 to 6 ft. 
.SAT NIGHT...SW winds 10 to 15 kt, shifting to W after midnight.
Seas 3 to 4 ft. 
.SUN...NE winds less than 10 kt, shifting to SE in the
afternoon. Seas 3 to 4 ft. 
.SUN NIGHT...SE winds less than 10 kt, shifting to S after
midnight. Seas 3 ft. 

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

...GALE WARNING...

.THIS AFTERNOON...NW winds 25 to 35 kt W of 70W, and NW 20 to
30 kt elsewhere. Seas 13 to 18 ft. 
.TONIGHT...NW winds 20 to 30 kt W of 70W, and NW 15 to 25 kt
elsewhere. Seas 12 to 17 ft. 
.THU...NW winds 10 to 20 kt. Seas 9 to 14 ft, subsiding to 8 to
11 ft in the afternoon. 
.THU NIGHT...W of 70W, W winds 10 to 15 kt, shifting to SW 15 to
25 kt after midnight. Elsewhere, W winds 10 to 15 kt. Seas 6 to
9 ft. 
.FRI...W winds 15 to 25 kt. Seas 8 to 11 ft. 
.FRI NIGHT...NW winds 15 to 25 kt. Seas 8 to 13 ft. 
.SAT...N winds 10 to 15 kt, shifting to SW in the afternoon.
Seas 8 to 11 ft. 
.SAT NIGHT...SW winds 10 to 15 kt. Seas 6 to 9 ft. 
.SUN...W winds less than 10 kt. Seas 5 to 7 ft. 
.SUN NIGHT...NW winds less than 10 kt, shifting to SE after
midnight. Seas 3 to 5 ft. 

Bahamas N of 22N

.THIS AFTERNOON...N winds 10 to 15 kt, diminishing to less than
10 kt in the afternoon. Seas 4 to 6 ft. 
.TONIGHT...N winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 6 to 8 ft. 
.THU...N winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 5 to 7 ft. 
.THU NIGHT...W winds less than 10 kt, shifting to NW after
midnight. Seas 3 to 5 ft. 
.FRI...NW winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...N winds 10 to 15 kt, shifting to NE after midnight.
Seas 3 to 5 ft. 
.SAT...E winds less than 10 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. 
.SUN...E winds less than 10 kt. Seas 3 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 ft. 

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

...GALE WARNING...

.THIS AFTERNOON...NW winds 15 to 25 kt W of 70W, and W 20 to
35 kt elsewhere. Seas 12 to 17 ft. 
.TONIGHT...NW winds 15 to 25 kt W of 70W, and W 20 to 30 kt
elsewhere. Seas 13 to 18 ft. 
.THU...NW winds 10 to 20 kt. Seas 9 to 14 ft W of 70W, and 11 to
15 ft elsewhere. 
.THU NIGHT...W winds 10 to 20 kt. Seas 8 to 11 ft. 
.FRI...W winds 10 to 20 kt. Seas 6 to 8 ft. 
.FRI NIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT...E winds less than 10 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. 
.SUN...E winds less than 10 kt. Seas 5 to 7 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...NW winds 10 to 15 kt. Seas 6 to 8 ft. 
.TONIGHT...NW winds 10 to 20 kt. Seas 7 to 10 ft. 
.THU...NW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 7 to 10 ft. 
.THU NIGHT...NW winds less than 10 kt. Seas 6 to 9 ft. 
.FRI...Variable winds less than 10 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. 
.SAT...E winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 

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

.THIS AFTERNOON...SW winds 10 to 15 kt. Seas 6 to 8 ft. 
.TONIGHT...SW winds 10 to 15 kt. Seas 6 to 9 ft. 
.THU...SW winds 10 to 15 kt. Seas 8 to 11 ft. 
.THU NIGHT...SW winds 10 to 15 kt, shifting to W after midnight.
Seas 8 to 11 ft. 
.FRI...S winds less than 10 kt. Seas 7 to 10 ft. 
.FRI NIGHT...Variable winds less than 10 kt. Seas 6 to 8 ft. 
.SAT...E winds less than 10 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.