583
FZNT31 KNHC 200319
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1119 PM EDT Tue Aug 19 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...The pressure gradient will begin to increase across
most of the Caribbean and Tropical N Atlantic now that Hurricane
Erin, presently located about 510 nm west-southwest of Bermuda,
continues to pull farther to the north-northwest of the region
while central Atlantic high pressure builds west- southwestward
in its wake. As a result, trades are expected to increase to
fresh to strong speeds across the south-central Caribbean
beginning Wed afternoon and continue through Fri as high
pressure builds in the wake of Erin. Meanwhile, a tropical wave
located over the central tropical Atlantic continues to produce
a broad area of disorganized showers and thunderstorms.
Environmental conditions appear conducive for gradual
development of this system, and a tropical depression could form
late this week or over the weekend while it moves near or to the
north of the northern Leeward Islands.

NW Caribbean W of 85W

.OVERNIGHT...E winds less than 10 kt. Seas 2 ft or less.
.WED...SE winds less than 10 kt. Seas 2 ft or less.
.WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less.
.THU...SE winds 10 to 15 kt. Seas 2 ft or less.
.THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI...SE winds 10 to 20 kt. Seas 3 to 4 ft.
.FRI NIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft.
.SAT...E 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 20 kt. Seas 3 to 5 ft.

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 15 kt. Seas 2 ft or less.
.WED...SE winds 10 to 20 kt. Seas 2 ft or less.
.WED NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft S of 18N, and
2 ft or less elsewhere.
.THU...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft or
less elsewhere.
.THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and
2 ft or less elsewhere.
.FRI...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft or
less elsewhere.
.FRI NIGHT...E winds 10 to 20 kt. S of 18N, seas 3 to 5 ft.
Elsewhere, seas 2 to 3 ft.
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft.
.SAT NIGHT...E winds 10 to 20 kt. S of 18N, seas 3 to 5 ft.
Elsewhere, seas 2 to 3 ft.
.SUN...E winds 10 to 20 kt. Seas 3 to 5 ft.

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building
to 3 ft after midnight.
.WED...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 20 kt elsewhere. Seas 3 to 4 ft.
.WED NIGHT...NE winds 15 to 25 kt. Seas 6 to 8 ft within 90 nm
of coast of Colombia, and 3 to 5 ft elsewhere.
.THU...E winds 15 to 25 kt. Seas 6 to 8 ft within 90 nm of coast
of Colombia, and 4 to 6 ft elsewhere.
.THU NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft.
.FRI...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 20 kt elsewhere. Seas 4 to 6 ft.
.FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...E 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 4 ft.

SW Caribbean S of 11N

.OVERNIGHT...NE winds 10 to 15 kt. Seas 2 ft or less.
.WED...NE winds 10 to 15 kt. Seas 2 ft or less.
.WED NIGHT...N winds 10 to 20 kt. Seas 3 ft.
.THU...N winds 10 to 20 kt. Seas 3 to 5 ft.
.THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI...SW winds 10 to 15 kt. Seas 3 to 5 ft.
.FRI NIGHT...SW winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT...SW winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT NIGHT...W winds 10 to 15 kt. Seas 3 to 4 ft.
.SUN...SW to W winds less than 10 kt. Seas 3 to 4 ft.

Caribbean between 64W and 72W

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft.
.WED...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt
elsewhere. Seas 3 to 5 ft.
.WED NIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 4 to 6 ft.
.THU...Gulf of Venezuela, NE to E winds 20 to 25 kt, diminishing
to 10 to 20 kt in the afternoon. Elsewhere, E winds 15 to 25 kt.
Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere.
.THU NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft.
.FRI...NE winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt
elsewhere. Seas 4 to 6 ft.
.FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.SAT...SE winds 10 to 20 kt. Seas 3 to 4 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 5 ft elsewhere.
.SUN...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela,
and 4 to 6 ft elsewhere.

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

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 20 kt. Seas 4 to 6 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.FRI...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.FRI NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...SE winds 10 to 20 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 5 to 7 ft.

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

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 20 kt. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.THU...E winds 10 to 20 kt. Seas 3 to 5 ft.
.THU NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.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 4 to 6 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Erin is near 27.7N 73.0W at 11 PM EDT, and
is moving north-northwest at 10 kt. Maximum sustained winds are
85 kt with gusts to 105 kt, and the minimum central pressure is
959 mb. Erin will gradually strengthen as it moves to near 29.3N
73.5W Wed morning, to near 31.6N 73.4W Wed evening with maximum
sustained winds 95 kt gusts 115 kt, to near 33.8N 72.2W Thu
morning with maximum sustained winds 100 kt gusts 120 kt, then
begin to weaken as it moves well north-northeast of the region
through the rest of the forecast period. Swells generated by
Erin  will affect the Bahamas, Bermuda and the east coast of the
United States during the next several days. Otherwise, a
tropical wave located over the central tropical Atlantic
continues to produce a broad area of disorganized showers and
thunderstorms. Environmental conditions appear conducive for
gradual development of this system, and a tropical depression
could form late this week or over the weekend while it moves near
or to the north of the northern Leeward Islands.

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

.OVERNIGHT...N winds 20 to 30 kt. Seas 9 to 14 ft.
.WED...N winds 20 to 30 kt. Seas 12 to 17 ft.
.WED NIGHT...NW winds 20 to 30 kt. Seas 11 to 16 ft.
.THU...NW winds 15 to 25 kt. Seas 8 to 13 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 7 to 10 ft.
.FRI...W winds less than 10 kt. Seas 6 to 9 ft.
.FRI NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft.
.SAT...S winds less than 10 kt. Seas 6 to 8 ft.
.SAT NIGHT...S winds less than 10 kt. Seas 5 to 7 ft.
.SUN...SW winds 10 to 15 kt. Seas 5 to 7 ft.

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

...HURRICANE WARNING...

.OVERNIGHT...HURRICANE CONDITIONS. NE winds 80 to 90 kt W of
70W, and SE 30 to 40 kt elsewhere. Seas 21 to 31 ft W of 70W,
and 12 to 17 ft elsewhere.
.WED...HURRICANE CONDITIONS EXPECTED. S winds 80 to 90 kt W of
70W, and S 25 to 35 kt elsewhere. Seas 21 to 31 ft W of 70W, and
11 to 16 ft elsewhere.
.WED NIGHT...HURRICANE CONDITIONS EXPECTED. W of 70W, SW winds
70 to 90 kt, diminishing to 50 to 60 kt late. Seas 19 to 29 ft,
subsiding to 15 to 25 ft late. Elsewhere, S winds 30 to 40 kt,
seas 11 to 16 ft.
.THU...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, W winds
35 to 45 kt, diminishing to 20 to 30 kt in the afternoon.
Elsewhere, S winds 25 to 35 kt. Seas 12 to 17 ft.
.THU NIGHT...SW winds 20 to 30 kt. Seas 9 to 14 ft.
.FRI...NW winds 10 to 20 kt W of 70W, and SW 20 to 30 kt
elsewhere. Seas 8 to 11 ft W of 70W, and 9 to 14 ft elsewhere.
.FRI NIGHT...W of 70W, N to NE winds 10 to 15 kt. Elsewhere, W
winds 10 to 20 kt. Seas 8 to 11 ft W of 70W, and 9 to 14 ft
elsewhere.
.SAT...SE winds less than 10 kt. Seas 8 to 13 ft.
.SAT NIGHT...S winds less than 10 kt W of 70W, and SE 10 to
15 kt elsewhere. Seas 8 to 11 ft.
.SUN...S winds 10 to 15 kt. Seas 7 to 10 ft.

Bahamas N of 22N

.OVERNIGHT...W winds 15 to 25 kt. Seas 6 to 9 ft.
.WED...W winds 15 to 25 kt. Seas 6 to 8 ft.
.WED NIGHT...SW winds 10 to 20 kt. Seas 4 to 6 ft.
.THU...SW winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI...SW winds 10 to 15 kt, shifting to NW in the afternoon.
Seas 3 to 4 ft.
.FRI NIGHT...E 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 3 to 5 ft.
.SUN...SE winds less than 10 kt. Seas 3 to 5 ft.

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

...HURRICANE WARNING...

.OVERNIGHT...TROPICAL STORM CONDITIONS. SW winds 55 to 65 kt W
of 70W, and S 25 to 35 kt elsewhere. Seas 12 to 17 ft W of 70W,
and 8 to 13 ft elsewhere.
.WED...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, SW winds
35 to 45 kt, diminishing to 20 to 30 kt in the afternoon.
Elsewhere, S winds 20 to 30 kt. Seas 9 to 14 ft W of 70W, and
8 to 11 ft elsewhere.
.WED NIGHT...W of 70W, SW winds 20 to 30 kt. Elsewhere, S winds
20 to 30 kt, diminishing to 10 to 20 kt late. Seas 7 to 10 ft.
.THU...S winds 15 to 25 kt. Seas 6 to 9 ft.
.THU NIGHT...S winds 10 to 20 kt. Seas 6 to 8 ft.
.FRI...S winds 10 to 15 kt. Seas 6 to 8 ft.
.FRI NIGHT...W of 70W, SW winds 10 to 15 kt, shifting to SE
after midnight. Elsewhere, E winds 10 to 15 kt. Seas 6 to 9 ft.
.SAT...S winds less than 10 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 7 to 10 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft.
.SUN...E winds less than 10 kt W of 70W, and SE 10 to 20 kt
elsewhere. Seas 8 to 10 ft.

ATLC waters S of 22N W of 65W

.OVERNIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft.
.WED...S winds 10 to 20 kt. Seas 4 to 6 ft.
.WED NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.THU...SE winds 10 to 20 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI...E winds 10 to 20 kt. Seas 3 to 4 ft.
.FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN...SE winds 10 to 20 kt. Seas 5 to 7 ft.

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

.OVERNIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.WED...E winds 10 to 20 kt. Seas 4 to 5 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 20 kt. Seas 5 to 6 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...SE winds 10 to 20 kt. Seas 6 to 8 ft.
.SAT...SE winds 15 to 25 kt. Seas 6 to 9 ft.
.SAT NIGHT...SE winds 10 to 20 kt. Seas 6 to 9 ft.
.SUN...SE winds 10 to 20 kt. Seas 7 to 9 ft.