778
FZNT31 KNHC 180819
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
319 AM EST Tue Nov 18 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 1013 mb low pressure between Grand Cayman and the
Isle of Youth will devolve into a surface trough today, move W
to the Yucatan Channel tonight, then dissipate Wed. High
pressure building from the north will gradually cause tradewinds
to return to normal magnitude by mid- week, with moderate to
locally fresh NE to E winds expected Wed into the weekend.
Pulsing strong winds are likely offshore Colombia during the
overnight and early morning hours.

NW Caribbean W of 85W

.TODAY...E winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...NE winds 10 to 15 kt, shifting to E after midnight.
Seas 2 ft or less.
.WED...E winds less than 10 kt. Seas 2 ft or less.
.WED NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less, building to 3 ft after
midnight.
.THU...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.SAT...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.SAT NIGHT...NE winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 3 ft.

Caribbean N of 15N between 72W and 85W

.TODAY...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 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.WED...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E 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 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 15 to 20 kt within 90 nm of coast of Colombia,
and E 10 to 15 kt elsewhere. Seas 3 to 5 ft.
.TONIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft.
.WED...E winds 15 to 20 kt within 90 nm of coast of Colombia,
and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft.
.WED NIGHT...E winds 15 to 20 kt within 90 nm of coast of
Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft.
.THU...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft.
.FRI...E winds 10 to 15 kt. Seas 4 to 5 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft.

SW Caribbean S of 11N

.TODAY...NE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 to 5 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...N winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...N winds less than 10 kt. Seas 4 to 6 ft.
.THU NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.FRI...N winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...NE winds less than 10 kt. Seas 4 to 6 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft.

Caribbean between 64W and 72W

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TONIGHT...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Gulf of Venezuela, seas 3 ft in the
morning, subsiding to 2 ft or less. Elsewhere, seas 3 to 5 ft.
.WED NIGHT...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 3 to
5 ft elsewhere.
.THU...E winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...E 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...NE winds 10 to 15 kt. Seas 3 to 5 ft.

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

.TODAY...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.WED NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft.
.THU...E winds less than 10 kt. Seas 4 to 6 ft.
.THU NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft.
.FRI...NE winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...NE winds less than 10 kt. Seas 3 to 5 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft.
.THU NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.FRI...E winds less than 10 kt. Seas 4 to 6 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A weak and slow moving cold front from near 31N63W
to the NW Bahamas will slide E today and weaken, stall tonight
from around 31N58W to 27N70W, then dissipate Wed. High pressure
will build S toward the waters in the wake of the front through
late week, leading to gentle breezes N of 25N and moderate E
winds to the south. N swell will induce rough seas N of 28N and E
of 70W into tonight. Thereafter, moderate seas will gradually
decay from moderate to slight from west to east across the area
through late week. Looking ahead, SW winds may increase slightly
off northeast Florida late Fri through Sat ahead of a weak cold
front moving through the southeast U.S.

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

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TONIGHT...SE winds 10 kt. Seas 3 to 4 ft.
.WED...E winds less than 10 kt. Seas 3 ft.
.WED NIGHT...S winds less than 10 kt. Seas 3 ft.
.THU...N winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 2 ft or less.
.THU NIGHT...NE winds less than 10 kt in the evening, becoming
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...S winds 10 kt. Seas 2 ft or less.
.SAT...SW winds 10 to 15 kt. Seas 2 ft or less.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...NE winds 10 to 15 kt W of 70W, and N less than 10 kt
elsewhere. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...NE winds less than 10 kt. Seas 4 to 6 ft.
.WED NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.THU...NE winds less than 10 kt. Seas 3 to 5 ft.
.THU NIGHT...N winds less than 10 kt. Seas 3 to 4 ft.
.FRI...N winds less than 10 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 ft.
.SAT...Variable winds less than 10 kt, becoming W less than
10 kt in the afternoon. Seas 3 ft.
.SAT NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft.

Bahamas N of 22N

.TODAY...NE winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 2 ft or less, building to 3 ft after
midnight.
.WED...NE winds 10 to 15 kt. Seas 3 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
.THU...NE winds 10 to 15 kt. Seas 3 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 ft.
.FRI...E winds 10 to 15 kt. Seas 3 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft.
.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.

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

.TODAY...Variable winds less than 10 kt, becoming NE less than
10 kt in the afternoon. Seas 4 to 6 ft.
.TONIGHT...NE winds 10 kt. Seas 4 to 6 ft.
.WED...NE winds 10 kt. Seas 4 to 6 ft.
.WED NIGHT...NE winds 10 kt. Seas 4 to 5 ft.
.THU...NE winds 10 kt. Seas 3 to 5 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...NE winds 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...NE winds 10 kt. Seas 3 to 4 ft.
.SAT NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.

ATLC waters S of 22N W of 65W

.TODAY...E winds less than 10 kt. Seas 3 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...NE winds 10 to 15 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 4 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...E winds 10 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.
.WED...E winds 10 kt. Seas 5 to 6 ft.
.WED NIGHT...NE winds 10 kt. Seas 5 to 6 ft.
.THU...NE winds less than 10 kt. Seas 5 to 6 ft.
.THU NIGHT...NE winds less than 10 kt. Seas 5 to 6 ft.
.FRI...NE winds less than 10 kt. Seas 4 to 5 ft.
.FRI NIGHT...NE winds 10 kt. Seas 4 ft.
.SAT...NE winds 10 kt. Seas 4 ft.
.SAT NIGHT...NE winds 10 kt. Seas 4 ft.