753 
FZNT31 KNHC 192030
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
430 PM 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 locally 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 Fri night through Mon night, with pulsing gales at night
offshore Colombia Sat and Sun. Rough to very rough seas are
expected with the strongest winds late Sat through Mon. Fresh to
locally strong 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 at night in the Gulf of Honduras
Sun and Mon. 

NW Caribbean W of 85W

.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 less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 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. 
.MON...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 

Caribbean N of 15N between 72W and 85W

.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU...E winds 10 to 15 kt. Seas 3 to 5 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. 
.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. 

Caribbean from 11N to 15N W of 72W

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

.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 20 kt within 90 nm of coast of Colombia,
and NE 10 to 15 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 9 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. 
.MON...E winds 15 to 25 kt. Seas 8 to 13 ft. 
.MON NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. 

SW Caribbean S of 11N

.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...N winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 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. 
.MON...NE winds 10 to 20 kt. Seas 8 to 11 ft. 
.MON NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft. 

Caribbean between 64W and 72W

.TONIGHT...NE winds 15 to 20 kt Gulf of Venezuela, and NE 10 to
15 kt elsewhere. Seas 3 to 5 ft. 
.THU...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt
elsewhere. 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 4 to 6 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. 
.MON...E winds 10 to 20 kt. Seas 6 to 9 ft. 
.MON 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

.TONIGHT...S winds less than 10 kt. Seas 3 to 5 ft. 
.THU...SE winds less than 10 kt. Seas 4 to 6 ft. 
.THU NIGHT...E winds less than 10 kt. Seas 6 to 8 ft. 
.FRI...SE winds less than 10 kt. Seas 6 to 8 ft. 
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. 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 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 6 to 8 ft. 
.MON 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

.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 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 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. 
.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. 

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. Looking ahead, a weak cold front may enter the
NW offshores Mon night. 

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

.TONIGHT...NW winds less than 10 kt. Seas 7 to 10 ft. 
.THU...SW winds 10 to 20 kt. Seas 6 to 8 ft. 
.THU NIGHT...W winds 20 to 30 kt. Seas 6 to 7 ft, building to
7 to 10 ft after midnight. 
.FRI...NW winds 20 to 25 kt, diminishing to 10 to 20 kt in the
afternoon. Seas 8 to 11 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...Variable winds less than 10 kt, becoming SW less than
10 kt in the afternoon. Seas 3 to 5 ft. 
.SAT NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. 
.SUN...SE winds less than 10 kt. Seas 3 ft. 
.SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON...S winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. 

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

...GALE WARNING...

.TONIGHT...NW winds 20 to 35 kt. Seas 12 to 17 ft. 
.THU...W of 70W, NW winds 10 to 20 kt. Elsewhere, NW winds 15 to
25 kt, diminishing to 10 to 15 kt in the afternoon. 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, NW winds 10 to 15 kt. Seas 7 to
10 ft. 
.FRI...W of 70W, W winds 15 to 25 kt. Elsewhere, W winds 10 to
15 kt, shifting to SW 15 to 25 kt in the afternoon. Seas 8 to
13 ft W of 70W, and 6 to 8 ft elsewhere. 
.FRI NIGHT...NW winds 15 to 25 kt. Seas 8 to 13 ft. 
.SAT...N winds 10 to 15 kt, shifting to S in the afternoon. Seas
7 to 10 ft. 
.SAT NIGHT...W winds less than 10 kt. Seas 6 to 9 ft. 
.SUN...N winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 5 to 7 ft. 
.SUN NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. 

Bahamas N of 22N

.TONIGHT...N winds 10 to 15 kt. Seas 5 to 7 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, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 ft. 
.FRI...NW winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. 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, increasing to 10 to 15 kt in the
afternoon. Seas 3 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. 

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

.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 W of 70W, and W 15 to 25 kt
elsewhere. W of 70W, seas 9 to 14 ft. Elsewhere, seas 13 to
16 ft, subsiding to 11 to 13 ft in the afternoon. 
.THU NIGHT...W winds 10 to 15 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 8 ft. 
.SAT...NE winds 10 to 15 kt, shifting to E in the afternoon.
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. 
.MON...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 

ATLC waters S of 22N W of 65W

.TONIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.THU...NW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 6 to 9 ft. 
.THU NIGHT...NW winds less than 10 kt. Seas 6 to 8 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. 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. 
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 

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

.TONIGHT...SW winds 10 to 15 kt. Seas 6 to 9 ft. 
.THU...SW winds 10 to 15 kt. Seas 7 to 10 ft. 
.THU NIGHT...SW winds 10 to 15 kt, shifting to W after midnight.
Seas 8 to 11 ft. 
.FRI...SW winds less than 10 kt. Seas 7 to 9 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. 
.MON...E winds 10 to 15 kt. Seas 6 to 7 ft. 
.MON NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft.