015 
FZNT31 KNHC 201530
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1130 AM EDT Thu Mar 20 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...Fresh to strong E to NE winds will occur offshore of
Colombia and Venezuela through early next week as low pressure 
prevails over northwestern Colombia. Winds are expected to pulse 
to gale force offshore of Colombia each night and early morning 
Fri into early next week, with a brief period of gales possible 
in the Gulf of Venezuela Sat night. Rough to locally very rough 
seas will accompany these winds. Moderate to locally fresh trade 
winds across the southwestern, central and eastern basin today 
will strengthen to fresh to strong speeds Fri through early next 
week as the pressure gradient strengthens between the Colombian 
low and high pressure building north of the region. Elsewhere, a 
cold front moving through the Gulf of America will enter the 
northwestern Caribbean late tonight, leading to moderate to fresh
NE winds and locally rough seas in the wake of the front into 
Fri afternoon. Fresh to locally strong NE winds are expected to 
pulse through the Windward Passage and in the lee of Cuba Fri 
into early next week. Looking ahead, fresh to strong SE winds are
slated to develop across the Gulf of Honduras by late weekend as
the pressure gradient strengthens between the aforementioned 
high pressure and low pressure moving through the southeastern 
United States. 

NW Caribbean W of 85W

.THIS AFTERNOON...E winds less than 10 kt. Seas 3 ft. 
.TONIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft. 
.FRI...NE winds 10 to 15 kt. Seas 4 to 6 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 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 4 to 6 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

.THIS AFTERNOON...E winds 10 to 15 kt S of 18N, and E less than
10 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...S of 18N, NE winds 10 to 15 kt. Elsewhere, NE winds
less than 10 kt, shifting to N after midnight. Seas 3 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft
or less elsewhere. 
.FRI NIGHT...S of 18N, NE winds 10 to 20 kt. Elsewhere, NE winds
less than 10 kt, increasing to 10 to 15 kt after midnight. Seas
4 to 6 ft S of 18N, and 3 ft elsewhere. 
.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 WARNING...
...GALE CONDITIONS POSSIBLE EACH NIGHT AND MORNING THIS WEEKEND...

.THIS AFTERNOON...NE winds 20 to 30 kt within 90 nm of coast of 
Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. 
.TONIGHT...NE winds 20 to 30 kt within 90 nm of coast of 
Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. 
.FRI...NE winds 15 to 25 kt. Seas 5 to 7 ft. 
.FRI NIGHT...NE winds 25 to 35 kt within 90 nm of coast of 
Colombia, and NE 15 to 25 kt elsewhere. Seas 6 to 8 ft. 
.SAT...NE winds 20 to 30 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NE winds 25 to 30 kt. Seas 8 to 11 ft. 
.SUN...E winds 25 to 30 kt. Seas 8 to 13 ft. 
.SUN NIGHT...E winds 25 to 30 kt. Seas 8 to 13 ft. 
.MON...E winds 25 to 30 kt. Seas 8 to 13 ft. 
.MON NIGHT...E winds 25 to 30 kt. Seas 8 to 11 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT...NE winds 15 to 25 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 13 ft. 
.SUN NIGHT...NE winds 15 to 25 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

...GALE CONDITIONS POSSIBLE THIS WEEKEND...

.THIS AFTERNOON...E winds 15 to 20 kt Gulf of Venezuela, and E 
10 to 15 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.FRI...E winds 15 to 20 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds 20 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 5 to 7 ft. 
.SAT...E winds 20 to 30 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E winds 20 to 30 kt. Seas 6 to 8 ft. 
.SUN...E winds 20 to 25 kt. Seas 6 to 8 ft. 
.SUN NIGHT...E winds 20 to 25 kt. Seas 6 to 8 ft. 
.MON...E winds 20 to 25 kt. Seas 6 to 9 ft. 
.MON NIGHT...E winds 20 to 25 kt. Seas 6 to 8 ft. 

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

.THIS AFTERNOON...SE winds less than 10 kt. Seas 5 to 7 ft. 
.TONIGHT...E winds less than 10 kt. Seas 5 to 7 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 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 9 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. 
.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 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. 
.MON...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Strong to near-gale force S to SW winds will occur 
north of 24N and east of 65W into early Fri, as a low pressure 
system lifts northeastward through the central Atlantic. Rough 
seas associated with this system will propagate southeastward 
through Fri, with seas in excess of 8 ft expected north of 16N 
and east of 77W through late tonight, and north of 14N and east 
of 62W by late Fri morning. Peak seas of 12 to 16 ft will occur 
north of 20N between 72W and 55W into Fri morning. Farther west, 
fresh to strong SW winds will occur this afternoon off the coast 
of Florida ahead of a cold front moving through the Gulf of 
America. The cold front is slated to move off the coast of the 
southeastern United States later today, supporting strong to 
near-gale force W to NW winds and rough seas in excess of 8 ft in
its wake. The front will progress eastward Fri through Sat, 
leading to fresh to strong SW winds ahead of the front, and 
strong to near-gale force winds and locally very rough seas 
behind the front into early Sat. Looking ahead, fresh trade winds
and rough seas are expected to develop east of the Windward 
Islands this weekend into early next week. Elsewhere, high 
pressure will build over the western Atlantic this weekend. 

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

.THIS AFTERNOON...SW winds 10 to 20 kt. Seas 6 to 8 ft. 
.TONIGHT...W winds 20 to 30 kt. Seas 7 to 10 ft. 
.FRI...NW winds 20 to 25 kt, diminishing to 10 to 20 kt in the
afternoon. 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...Variable winds less than 10 kt, becoming SW less than
10 kt in the afternoon. Seas 4 to 6 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 15 kt. Seas 3 to 4 ft. 
.MON...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. 

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

.THIS AFTERNOON...NW winds 10 to 15 kt. Seas 8 to 12 ft. 
.TONIGHT...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
11 ft W of 70W, and 6 to 8 ft elsewhere. 
.FRI NIGHT...W of 70W, NW winds 15 to 25 kt, shifting to N 10 to
15 kt after midnight. Elsewhere, NW winds 15 to 25 kt. Seas 8 to
13 ft W of 70W, and 8 to 11 ft elsewhere. 
.SAT...N winds 10 to 15 kt, shifting to SE in the afternoon.
Seas 7 to 10 ft. 
.SAT NIGHT...NW winds less than 10 kt. Seas 6 to 8 ft. 
.SUN...Variable winds less than 10 kt, becoming E less than
10 kt in the afternoon. Seas 4 to 6 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 4 to 5 ft. 

Bahamas N of 22N

.THIS AFTERNOON...Variable winds less than 10 kt. Seas 4 to
6 ft. 
.TONIGHT...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...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...NE winds less than 10 kt, shifting to E after
midnight. Seas 3 to 4 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 to 4 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

.THIS AFTERNOON...NW winds 10 to 20 kt. Seas 9 to 12 ft W of
70W, and 11 to 13 ft elsewhere. 
.TONIGHT...NW winds 10 to 15 kt. Seas 8 to 11 ft. 
.FRI...W winds 10 to 15 kt. Seas 6 to 8 ft. 
.FRI NIGHT...NW winds 10 to 15 kt. Seas 6 to 9 ft W of 70W, and
5 to 7 ft elsewhere. 
.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 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

.THIS AFTERNOON...NW winds less than 10 kt. Seas 6 to 9 ft. 
.TONIGHT...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. 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 5 to 7 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 

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

.THIS AFTERNOON...SW winds 10 to 15 kt. Seas 8 to 11 ft. 
.TONIGHT...W winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 8 to 11 ft. 
.FRI...SW 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 5 to 7 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 6 ft. 
.MON...E winds 10 to 20 kt. Seas 6 to 7 ft. 
.MON NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft.