292
FZNT31 KNHC 230138
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
938 PM EDT Fri Aug 22 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 trades and moderate to locally rough
seas will prevail over the central Caribbean Sat night through
the next several days as central Atlantic high pressure builds
W-SW across the western Atlantic, in the wake of exiting
Hurricane Erin. Fresh to strong E to SE winds will pulse across
the Gulf of Honduras at night through Mon night. Moderate to
fresh trades are expected in the eastern Caribbean and across
the approach to the Windward Passage, increasing to fresh to
strong late in the weekend into early next week in the eastern
Caribbean. Mainly moderate or weaker winds are forecast
elsewhere. Meanwhile, showers and thunderstorms associated with
a tropical wave located about midway between Africa and the
Windward Islands remain disorganized. While there is still some
chance that a short-lived tropical depression could form during
the next day or so, the system is expected to move through a
less conducive environment on Saturday. The wave could reach a
slightly more favorable environment late this weekend into early
next week as it approaches the Windward Islands.

NW Caribbean W of 85W

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 20 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 4 ft.
.MON...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...NE winds less than 10 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 ft.

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 4 to 6 ft S of 18N, and 3 to 4 ft elsewhere.
.SAT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. S of 18N, seas 3 to 5 ft. Elsewhere, seas 3 ft in the
evening, subsiding to 2 ft or less.
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...NE winds 15 to 20 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 5 to 6 ft.
.SAT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.SUN...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 20 kt elsewhere. Seas 5 to 7 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.MON...E winds 15 to 25 kt. Seas 6 to 8 ft.
.MON NIGHT...NE winds 15 to 25 kt. Seas 6 to 8 ft.
.TUE...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 8 ft.
.WED NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.

SW Caribbean S of 11N

.OVERNIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.SAT...SW winds less than 10 kt. Seas 3 to 5 ft.
.SAT NIGHT...W winds less than 10 kt. Seas 3 to 5 ft.
.SUN...Variable winds less than 10 kt. Seas 3 to 4 ft.
.SUN NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft.
.MON...NW winds less than 10 kt. Seas 4 to 6 ft.
.MON NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...NE winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft.
.WED...SE winds less than 10 kt, shifting to W in the afternoon.
Seas 4 to 6 ft.
.WED NIGHT...NW winds less than 10 kt. Seas 4 to 5 ft.

Caribbean between 64W and 72W

.OVERNIGHT...NE winds 15 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...NE winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 4 to 6 ft.
.SUN...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt
elsewhere. Seas 4 to 6 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.
.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 20 kt. Seas 5 to 7 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.

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

.OVERNIGHT...SE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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.
.MON...E winds 10 to 20 kt. Seas 6 to 9 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.WED...SE winds less than 10 kt. Seas 4 to 6 ft.
.WED NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft.

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

.OVERNIGHT...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 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 20 kt. Seas 5 to 7 ft.
.MON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...SE winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Large northerly swell generated by now extratropical
cyclone Erin will continue to affect the W Atlantic waters
through the next few days. In the wake of Erin, central Atlantic
high pressure will build W-SW toward the central Bahamas and the
Straits of Florida. Meanwhile, showers and thunderstorms have
not become any better organized this evening in association with
a trough of low pressure, AL90, located a couple hundred
nautical miles northeast of the northern Leeward Islands.
Environmental conditions appear conducive for further development
of this system, and a tropical storm is very likely to form this
weekend while it moves northwestward and then northward over the
southwestern Atlantic. This system has a high chance of tropical
cyclone formation. Regardless of formation, gale-force winds are
expected to develop across the eastern semicircle of this low
beginning Sun morning with building seas. A slow moving cold
front may move off the SE U.S. into the NW waters by the middle
of next week.

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

.OVERNIGHT...Variable winds less than 10 kt, becoming SW less
than 10 kt after midnight. Seas 6 to 9 ft.
.SAT...SW winds less than 10 kt. Seas 6 to 7 ft.
.SAT NIGHT...SW winds less than 10 kt. Seas 5 to 6 ft.
.SUN...SW winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 5 to 7 ft.
.MON...W winds 10 to 15 kt. Seas 5 to 6 ft.
.MON NIGHT...SW winds 10 kt. Seas 4 to 6 ft.
.TUE...W winds less than 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft.
.WED...Variable winds less than 10 kt, becoming NW less than
10 kt in the afternoon. Seas 3 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 ft.

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

.OVERNIGHT...Variable winds less than 10 kt W of 70W, and W less
than 10 kt elsewhere. Seas 8 to 11 ft.
.SAT...Variable winds less than 10 kt, becoming S less than
10 kt in the afternoon. Seas 8 to 11 ft.
.SAT NIGHT...S winds 10 kt W of 70W, and Variable less than
10 kt elsewhere. Seas 6 to 9 ft.
.SUN...W of 70W, SW winds 10 to 15 kt. Elsewhere, Variable winds
less than 10 kt, becoming SW less than 10 kt in the afternoon.
Seas 6 to 9 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 6 to 8 ft.
.MON...SW winds 10 to 15 kt. Seas 6 to 8 ft.
.MON NIGHT...SW winds 10 to 15 kt. Seas 6 to 8 ft.
.TUE...SW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.TUE NIGHT...S winds less than 10 kt. Seas 3 to 5 ft.
.WED...S winds less than 10 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft.

Bahamas N of 22N

.OVERNIGHT...SE winds less than 10 kt. Seas 3 to 5 ft.
.SAT...S winds less than 10 kt. Seas 3 to 5 ft.
.SAT NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft.
.SUN...SE winds less than 10 kt. Seas 3 to 5 ft.
.SUN NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft.
.MON...SE winds less than 10 kt. Seas 3 to 5 ft.
.MON NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. 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...E winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 ft.

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

.OVERNIGHT...N winds less than 10 kt, shifting to SE after
midnight. Seas 6 to 8 ft.
.SAT...Variable winds less than 10 kt. Seas 7 to 9 ft.
.SAT NIGHT...SE winds less than 10 kt W of 70W, and Variable
less than 10 kt elsewhere. Seas 7 to 9 ft.
.SUN...SE winds less than 10 kt. Seas 7 to 8 ft.
.SUN NIGHT...SE winds 10 kt. Seas 6 to 7 ft.
.MON...SE winds 10 kt. Seas 6 to 7 ft.
.MON NIGHT...SE winds 10 kt. Seas 5 to 7 ft.
.TUE...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.

ATLC waters S of 22N W of 65W

.OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 5 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 4 to 6 ft.
.MON...E winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 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 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.OVERNIGHT...SE winds less than 10 kt. Seas 6 ft.
.SAT...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft.
.SUN...E winds 10 to 15 kt. Seas 7 to 8 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.
.MON...E winds 10 to 15 kt. Seas 7 to 8 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.
.TUE...E winds 10 to 15 kt. Seas 6 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED...SE winds 10 kt. Seas 5 to 6 ft.
.WED NIGHT...SE winds 10 kt. Seas 4 to 5 ft.