120
FZNT31 KNHC 120819
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
419 AM EDT Mon May 12 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 easterly trade winds and rough seas
are expected across much of the central Caribbean, including
through the Windward Passage, into early Wed as a strong
pressure gradient prevails between high pressure to the north
and the Colombian low. Periods of near-gale force winds will be
possible offshore of Colombia and through the Gulf of Venezuela
each afternoon and night. Farther east, pulsing moderate to
fresh E winds and locally rough seas are likely across the
Atlantic Passages into the eastern Caribbean through midweek.
Looking ahead, winds and seas will slowly diminish by late week.

NW Caribbean W of 85W

.TODAY...NE winds less than 10 kt. Seas 3 to 5 ft.
.TONIGHT...E winds less than 10 kt. Seas 3 to 5 ft.
.TUE...E winds less than 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 5 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.THU...E winds 10 to 20 kt. Seas 5 to 7 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 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.

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 20 kt S of 18N, and SE less than 10 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere.
.TONIGHT...E winds 10 to 20 kt S of 18N, and E less than 10 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere.
.TUE...E winds 10 to 20 kt S of 18N, and E less than 10 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere.
.TUE NIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 6 to 8 ft S of 18N, and 3 to 5 ft elsewhere.
.WED...E winds 10 to 15 kt. 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. 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 4 to 6 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 15 to 25 kt. Seas 8 to 11 ft.
.TONIGHT...E winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 15 to 25 kt elsewhere. Seas 8 to 11 ft.
.TUE...E winds 15 to 25 kt. Seas 8 to 11 ft.
.TUE NIGHT...NE winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 10 to 20 kt elsewhere. Seas 7 to 10 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 9 ft.
.WED NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 8 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.FRI...E winds 10 to 15 kt. Seas 5 to 7 ft.
.FRI NIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 5 to 7 ft.

SW Caribbean S of 11N

.TODAY...NE winds 10 to 15 kt. Seas 7 to 10 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft.
.TUE...E winds 10 to 20 kt. Seas 7 to 10 ft.
.TUE NIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 6 to 9 ft.
.WED...E winds 10 to 15 kt. Seas 6 to 8 ft.
.WED NIGHT...NE winds less than 10 kt, shifting to S after
midnight. Seas 5 to 7 ft.
.THU...W winds less than 10 kt. Seas 5 to 7 ft.
.THU NIGHT...W winds less than 10 kt. Seas 4 to 6 ft.
.FRI...S winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...E winds less than 10 kt, shifting to SW after
midnight. Seas 3 to 5 ft.

Caribbean between 64W and 72W

.TODAY...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 9 ft
elsewhere.
.TONIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 9 ft
elsewhere.
.TUE...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt
elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 8 ft
elsewhere.
.TUE NIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 9 ft
elsewhere.
.WED...E winds 10 to 20 kt. Seas 6 to 8 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 8 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.FRI...E winds 10 to 20 kt. Seas 5 to 7 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 7 to 10 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 7 to 9 ft.
.TUE...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 15 kt. Seas 6 to 9 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI...E winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI 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...E winds 10 to 15 kt. Seas 6 to 9 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.TUE...E winds 10 to 15 kt. Seas 6 to 9 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 15 kt. Seas 6 to 9 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.THU...E winds 10 to 15 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI...E winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Tightening pressure gradient between a cold front in
the Gulf of America and the subtropical ridge will support fresh
to strong SE-S winds offshore of central and northern Florida
through Tue. Rough seas are forecast with these winds. The cold
front is slated to move offshore of the southeastern U.S. on Tue
and meander through midweek, before weakening and lifting
northeastward. Pulsing fresh to locally strong E winds are
expected off northern Hispaniola through midweek. Elsewhere,
moderate to locally strong trade winds will prevail south of 25N
this week. Locally rough seas in NE swell will impact the waters
near the Lesser Antilles and across the passages into the
Caribbean through late week.

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

.TODAY...SE winds 15 to 25 kt. Seas 5 to 7 ft.
.TONIGHT...S winds 15 to 25 kt. Seas 6 to 9 ft.
.TUE...SW winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...SW winds less than 10 kt, shifting to S after
midnight. Seas 4 to 6 ft.
.WED...SW winds 10 to 15 kt, shifting to W in the afternoon.
Seas 3 to 5 ft.
.WED NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.THU...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.THU NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TONIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft W of 70W, and
4 to 5 ft elsewhere.
.TUE...SE winds 10 to 20 kt W of 70W, and SE 10 to 15 kt
elsewhere. Seas 5 to 7 ft W of 70W, and 4 to 5 ft elsewhere.
.TUE NIGHT...S winds 10 to 15 kt W of 70W, and SE less than
10 kt elsewhere. Seas 4 to 6 ft.
.WED...S winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...S winds less than 10 kt. Seas 4 to 5 ft.
.THU...S winds 10 to 15 kt. Seas 4 to 5 ft.
.THU NIGHT...S winds less than 10 kt. Seas 3 to 5 ft.
.FRI...S winds less than 10 kt. Seas 3 to 4 ft.
.FRI NIGHT...S winds less than 10 kt. Seas 3 to 4 ft.

Bahamas N of 22N

.TODAY...SE winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.WED...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...SE winds less than 10 kt. Seas 3 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 ft.
.FRI...E winds less than 10 kt. Seas 3 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft.

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

.TODAY...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...SE winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.WED NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.THU...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.THU NIGHT...SE winds less than 10 kt. Seas 5 to 7 ft.
.FRI...SE winds less than 10 kt. Seas 4 to 6 ft.
.FRI NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.

ATLC waters S of 22N W of 65W

.TODAY...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED NIGHT...E winds 10 to 20 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 4 to 6 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 7 to 9 ft.
.TONIGHT...E winds 15 kt. Seas 7 to 8 ft.
.TUE...E winds 15 to 20 kt. Seas 7 to 8 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.
.WED...E winds 10 to 15 kt. Seas 7 to 8 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.
.THU...E winds 10 to 15 kt. Seas 7 to 8 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 7 to 8 ft.
.FRI...E winds 10 to 20 kt. Seas 7 to 8 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.