171
FZNT31 KNHC 040819
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
419 AM EDT Sat Oct 4 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...Gentle to moderate trade winds will prevail over
most of the Caribbean Sea into next week as a weak pressure
gradient persists across the region. Large N to NE swell,
generated by previous Tropical Cyclones Imelda and Humberto,
will continue to produce rough seas in the Atlantic Passages and
over the Atlantic waters E of the Lesser Antilles into Sun
night. Seas will slowly subside early next week. Looking ahead,
moderate to occasionally fresh E to SE winds will pulse in the
Gulf of Honduras Sun night into early next week.

NW Caribbean W of 85W

.TODAY...Variable winds less than 10 kt. Seas 3 ft.
.TONIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.SUN...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.MON...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 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...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.

Caribbean N of 15N between 72W and 85W

.TODAY...SE winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...S of 18N, E winds less than 10 kt, increasing to
10 to 15 kt after midnight. Elsewhere, SE winds less than 10 kt.
Seas 2 ft or less.
.SUN...E winds 10 to 15 kt S of 18N, and SE less than 10 kt
elsewhere. Seas 3 to 4 ft.
.SUN NIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds
less than 10 kt, increasing to 10 to 15 kt after midnight. Seas
3 to 4 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.
.TUE...E winds less than 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...E winds less than 10 kt. Seas 3 ft.
.WED...E winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.WED NIGHT...E winds less than 10 kt. Seas 2 ft or less.

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TONIGHT...Within 90 nm of coast of Colombia, E winds 10 to
15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to
15 kt after midnight. Seas 3 to 4 ft.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds less than 10 kt, shifting to NE after
midnight. Seas 3 to 4 ft.
.TUE...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.

SW Caribbean S of 11N

.TODAY...S winds less than 10 kt in the morning, becoming
variable winds less than 10 kt. Seas 3 ft.
.TONIGHT...Variable winds less than 10 kt, becoming S less than
10 kt after midnight. Seas 3 ft.
.SUN...Variable winds less than 10 kt, becoming S less than
10 kt in the afternoon. Seas 3 ft.
.SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.MON...Variable winds less than 10 kt. Seas 2 ft or less,
building to 3 ft in the afternoon.
.MON NIGHT...N winds less than 10 kt. Seas 3 ft.
.TUE...Variable winds less than 10 kt. Seas 3 ft.
.TUE NIGHT...Variable winds less than 10 kt. Seas 3 ft.
.WED...Variable winds less than 10 kt. Seas 3 ft.
.WED NIGHT...Variable winds less than 10 kt. Seas 3 ft.

Caribbean between 64W and 72W

.TODAY...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Gulf of Venezuela, seas 3 to 4 ft in the morning,
subsiding to 2 ft or less. Elsewhere, seas 4 to 6 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of
Venezuela, and 4 to 6 ft elsewhere.
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of Venezuela,
and 4 to 6 ft elsewhere.
.SUN NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft
elsewhere.
.MON...E winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE...E winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.

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

.TODAY...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 6 to 9 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft.
.SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 6 to 9 ft.
.SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 6 to 9 ft.
.MON...SE winds less than 10 kt. Seas 6 to 9 ft.
.MON NIGHT...SE winds less than 10 kt, shifting to E after
midnight. Seas 5 to 7 ft.
.TUE...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft.

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

.TODAY...SE winds less than 10 kt. Seas 5 to 7 ft.
.TONIGHT...E winds less than 10 kt. Seas 6 to 8 ft.
.SUN...SE winds less than 10 kt. Seas 6 to 8 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.MON...E winds less than 10 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, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 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 5 to 7 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...Fresh to strong NE winds will continue off the coast
of Florida and over the northern Bahamas, generally north of 25N
and west of 70W, into early next week, as an old frontal
boundary and weak area of low pressure meanders across the NW
Bahamas and south Florida over the next several days. Farther
east, fresh to strong NE to E winds are expected through Tue
north of a cold front extending from 26N55W to 24N70W to the NW
Bahamas. Large N to NE swell generated by previous Tropical
Cyclones Imelda and Humberto will continue to propagate southward
this weekend, leading to widespread rough seas north of 12N.
Seas in excess of 12 ft are expected north of 23N this weekend,
including near the northern Bahamas through this morning. Looking
ahead, a tropical wave has emerged off the coast of Africa. The
wave is forecast to interact with another disturbance over the
eastern tropical Atlantic, and then move westward after that.
Environmental conditions are expected to become conducive for
some slow development of this system in a few days, and a
tropical depression could form near or east of the Lesser
Antilles by the end of next week.

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

.TODAY...E winds 20 to 25 kt. Seas 10 to 12 ft.
.TONIGHT...E winds 20 to 25 kt. Seas 10 to 12 ft.
.SUN...E winds 15 to 25 kt. Seas 10 to 12 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 9 to 12 ft.
.MON...E winds 15 to 25 kt. Seas 9 to 11 ft.
.MON NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft.
.TUE...E winds 15 to 20 kt. Seas 8 to 10 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 7 to 9 ft.
.WED...E winds 10 to 20 kt. Seas 7 to 9 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.

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

.TODAY...E winds 15 to 20 kt. Seas 10 to 12 ft.
.TONIGHT...E winds 15 to 20 kt. Seas 10 to 12 ft.
.SUN...E winds 15 to 20 kt. Seas 9 to 12 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 9 to 12 ft.
.MON...E winds 15 to 25 kt. Seas 8 to 11 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 8 to 10 ft.
.TUE...E winds 15 to 20 kt. Seas 8 to 10 ft.
.TUE NIGHT...E winds 15 to 20 kt. Seas 8 to 10 ft.
.WED...E winds 10 to 20 kt. Seas 7 to 9 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft.

Bahamas N of 22N

.TODAY...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN...SE winds less than 10 kt. Seas 4 to 6 ft.
.SUN NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.MON...E winds less than 10 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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. Seas 3 to 5 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 10 to 12 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 9 to 12 ft.
.SUN...E winds 10 to 20 kt. Seas 9 to 11 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 8 to 10 ft.
.MON...E winds 10 to 20 kt. Seas 7 to 10 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.
.TUE...E winds 10 to 15 kt. Seas 7 to 10 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 15 kt. Seas 6 to 8 ft.
.WED NIGHT...E winds 10 kt. Seas 5 to 7 ft.

ATLC waters S of 22N W of 65W

.TODAY...Variable winds less than 10 kt. Seas 6 to 9 ft.
.TONIGHT...E winds less than 10 kt. Seas 6 to 8 ft.
.SUN...E winds less than 10 kt. Seas 6 to 8 ft.
.SUN NIGHT...E winds less than 10 kt. Seas 5 to 7 ft.
.MON...E winds less than 10 kt. Seas 5 to 7 ft.
.MON NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.
.TUE...E winds less than 10 kt. Seas 4 to 6 ft.
.TUE NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.
.WED...SE winds less than 10 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.

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

.TODAY...SE winds less than 10 kt. Seas 10 to 11 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 10 to 11 ft.
.SUN...E winds 10 to 15 kt. Seas 9 to 11 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 9 to 10 ft.
.MON...E winds 10 to 15 kt. Seas 8 to 9 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft.
.TUE...SE winds 10 to 15 kt. Seas 6 to 7 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 5 to 6 ft.
.WED...SE winds 10 to 15 kt. Seas 5 to 6 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft.