343
FZNT31 KNHC 150927
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
527 AM EDT Wed Oct 15 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...A cold front will move across Cuba and the NW
Caribbean through Thu before dissipating. Moderate to locally
fresh winds and moderate seas are expected in the wake of the
front. Unsettled weather conditions will persist along and ahead
of the frontal boundary through tonight. Elsewhere, a weak
pressure gradient will support moderate or lighter winds and
slight to moderate seas over much of the basin through Sat.
Easterly winds in the E Caribbean will become mainly fresh by
Sat evening as a vigorous tropical wave approaches the Lesser
Antilles. The tropical wave is forecast to enter the E Caribbean
late on Sun and fresh trades will extend to the central basin
waters.

NW Caribbean W of 85W

.TODAY...Variable winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less,
building to 3 ft after midnight.
.THU...NW winds less than 10 kt. Seas 2 ft or less.
.THU NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.FRI...SE winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SUN...E winds less than 10 kt. Seas 3 ft.
.SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less.

Caribbean N of 15N between 72W and 85W

.TODAY...Variable winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.THU...Variable winds less than 10 kt. Seas 2 ft or less.
.THU NIGHT...N winds less than 10 kt. Seas 2 ft or less.
.FRI...N winds less than 10 kt, shifting to SE in the afternoon.
Seas 2 ft or less.
.FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SAT...SE winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less.
.SUN...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less.
.SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.

Caribbean from 11N to 15N W of 72W

.TODAY...NE winds less than 10 kt in the morning, becoming
variable winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.THU...Variable winds less than 10 kt. Seas 2 ft or less.
.THU NIGHT...W winds 10 kt within 90 nm of coast of Colombia,
and Variable less than 10 kt elsewhere. Seas 2 ft or less.
.FRI...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT...Variable winds less than 10 kt, becoming E less than
10 kt in the afternoon. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.

SW Caribbean S of 11N

.TODAY...Variable winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...W winds less than 10 kt. Seas 2 ft or less.
.THU...Variable winds less than 10 kt. Seas 2 ft or less.
.THU NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI...Variable winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT...Variable winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SUN...Variable winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.

Caribbean between 64W and 72W

.TODAY...SE winds less than 10 kt. Seas 3 ft.
.TONIGHT...SE winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Gulf of Venezuela, seas 2 ft or
less. Elsewhere, seas 3 ft in the evening, subsiding to 2 ft or
less.
.THU...Gulf of Venezuela, W winds less than 10 kt, shifting to
SW in the afternoon. Elsewhere, S winds less than 10 kt. Seas
2 ft or less.
.THU NIGHT...SW winds less than 10 kt. Seas 2 ft or less.
.FRI...Variable winds less than 10 kt, becoming SW less than
10 kt in the afternoon. Seas 2 ft or less.
.FRI NIGHT...SE winds less than 10 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.

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

.TODAY...SE winds less than 10 kt, shifting to S in the
afternoon. Seas 3 to 5 ft.
.TONIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...S winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...S winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 4 to 6 ft.
.SAT...SE winds 10 to 15 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 6 to 9 ft.

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

.TODAY...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...SE winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...E 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 4 to 6 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 9 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A cold front extending from 31N59W to Andros Island
and the Straits of Florida will move SE across the forecast
waters through Thu before dissipating. The front will reach from
31N57W to the Dominican Republic this evening, and from 31N55W
to 20N65W Thu evening. Fresh to near gale force winds and rough
seas are expected on either side of the front across the waters N
of 24N through Thu evening. A reinforcing front will follow the
main front, and is forecast to extend from 31N60W to the Straits
of Florida by Fri morning. Meanwhile, Tropical Storm Lorenzo is
near 20.5N 45.1W at 5 AM EDT, and is moving north at 11 kt.
Maximum sustained winds are 35 kt with gusts to 45 kt, and the
minimum central pressure is 1004 mb. Lorenzo will move to 22.9N
43.3W this afternoon, 25.7N 40.4W Thu morning, and dissipate Thu
afternoon.

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

.TODAY...N winds 10 to 20 kt. Seas 6 to 8 ft.
.TONIGHT...N winds 10 to 15 kt. Seas 6 to 8 ft.
.THU...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.THU NIGHT...NE winds 15 to 20 kt. Seas 6 to 9 ft.
.FRI...NE winds 10 to 15 kt. Seas 7 to 8 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 6 to 7 ft.
.SAT...NE winds 10 kt. Seas 5 to 7 ft.
.SAT NIGHT...SE winds 10 kt. Seas 5 to 7 ft.
.SUN...S winds 10 kt. Seas 5 to 7 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft.

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

.TODAY...NW winds 10 to 20 kt. Seas 6 to 9 ft.
.TONIGHT...N winds 10 to 15 kt W of 70W, and NW 10 to 20 kt
elsewhere. Seas 7 to 10 ft.
.THU...N winds 10 to 20 kt. Seas 8 to 11 ft.
.THU NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft.
.FRI...N winds 15 to 25 kt. Seas 8 to 13 ft.
.FRI NIGHT...N winds 15 to 25 kt. Seas 8 to 13 ft.
.SAT...N winds 10 to 15 kt. Seas 9 to 14 ft.
.SAT NIGHT...N winds 10 to 15 kt, shifting to NE after midnight.
Seas 9 to 14 ft.
.SUN...Variable winds less than 10 kt. Seas 8 to 11 ft.
.SUN NIGHT...Variable winds less than 10 kt, becoming SE less
than 10 kt after midnight. Seas 6 to 9 ft.

Bahamas N of 22N

.TODAY...N winds 10 to 15 kt. Seas 3 ft.
.TONIGHT...N winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 ft.
.THU...N winds less than 10 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 3 to 5 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 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.
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.TODAY...W winds 10 to 15 kt. Seas 4 to 6 ft.
.TONIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.THU NIGHT...NW winds 10 to 15 kt. Seas 6 to 8 ft.
.FRI...N winds 10 to 15 kt. Seas 6 to 8 ft.
.FRI NIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft.
.SAT...N winds 10 kt. Seas 6 to 9 ft.
.SAT NIGHT...NE winds less than 10 kt. Seas 8 to 11 ft.
.SUN...E winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 8 to 11 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.

ATLC waters S of 22N W of 65W

.TODAY...SW winds less than 10 kt. Seas 3 ft.
.TONIGHT...W winds less than 10 kt. Seas 3 ft.
.THU...NW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.THU NIGHT...NW winds less than 10 kt. Seas 3 to 5 ft.
.FRI...NW winds less than 10 kt. Seas 3 to 5 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 5 to 7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

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

.TODAY...S winds less than 10 kt. Seas 4 to 5 ft.
.TONIGHT...SW winds 10 kt. Seas 4 to 6 ft.
.THU...SW winds 10 to 20 kt. Seas 5 to 7 ft.
.THU NIGHT...SW winds 10 to 20 kt. Seas 6 to 8 ft.
.FRI...SW winds 10 to 20 kt. Seas 6 to 8 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 6 to 8 ft.
.SAT...SW winds 10 to 15 kt, shifting to S in the afternoon.
Seas 5 to 7 ft.
.SAT NIGHT...SE winds less than 10 kt. Seas 5 to 7 ft.
.SUN...E winds 10 to 15 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 7 to 9 ft.