867
FZNT31 KNHC 042028
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
428 PM 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...Large N swell will produce rough seas over the
waters east of the Lesser Antilles and through the Atlantic
Passages this weekend before seas slowly subside early next week.
Moderate seas will also filter through the eastern Caribbean
this weekend. Elsewhere, moderate to locally fresh E to SE winds
will pulse in the northwestern Caribbean, including the Gulf of
Honduras, each night through the middle of next week. Looking
ahead, a broad area of low pressure associated with a tropical
wave has formed several hundred miles south of the Cabo Verde
Islands. Environmental conditions appear conducive for gradual
development of this system, and it could become a tropical
depression by the middle to latter part of next week while moving
across the central tropical Atlantic and approaching portions of
the Leeward Islands. There is a medium chance of tropical
development within the next 7 days.

NW Caribbean W of 85W

.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 20 kt. Seas 3 to 4 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.MON NIGHT...E winds 15 to 25 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, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...E winds less than 10 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds less than 10 kt. Seas 3 ft.

Caribbean N of 15N between 72W and 85W

.TONIGHT...E winds less than 10 kt. Seas 3 to 4 ft.
.SUN...E winds 10 to 15 kt S of 18N, and SE less than 10 kt
elsewhere. Seas 3 to 4 ft.
.SUN NIGHT...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 S of 18N, and E less than 10 kt
elsewhere. 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 to 4 ft.
.WED...E winds less than 10 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.
.THU...E winds less than 10 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.

Caribbean from 11N to 15N W of 72W

.TONIGHT...Within 90 nm of coast of Colombia, NE 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 5 ft.
.MON...E winds 10 to 15 kt. Seas 3 to 5 ft.
.MON NIGHT...NE winds less than 10 kt. 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.
.THU...E winds 10 to 15 kt. Seas 3 to 4 ft.
.THU 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

.TONIGHT...Variable winds less than 10 kt. 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 3 ft.
.MON...Variable winds less than 10 kt. Seas 3 ft.
.MON NIGHT...Variable 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.
.THU...Variable winds less than 10 kt. Seas 3 ft.
.THU NIGHT...Variable winds less than 10 kt. Seas 3 ft.

Caribbean between 64W and 72W

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

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

.TONIGHT...E winds 10 to 15 kt. Seas 6 to 10 ft.
.SUN...E winds less than 10 kt. Seas 6 to 10 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, increasing to 10 to 15 kt
after midnight. Seas 6 to 8 ft.
.TUE...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT...E winds 10 to 15 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 6 to 9 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 9 ft.
.THU 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

.TONIGHT...E winds less than 10 kt. Seas 6 to 9 ft.
.SUN...SE winds less than 10 kt. Seas 6 to 9 ft.
.SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 5 to 8 ft.
.MON...E winds less than 10 kt. Seas 5 to 8 ft.
.MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. 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 5 to 7 ft.
.WED...E winds 10 to 15 kt. Seas 5 to 7 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.THU...E winds 10 to 15 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Large N to NE swell will continue to produce rough
seas from coastal Florida through the Bahamas and Greater
Antilles and across much of the open ocean, generally north of
10N, this weekend. Very rough seas in excess of 12 ft are
expected north of 20N through Sun morning. Seas will slowly
subside from north to south over the central Atlantic early next
week, with rough seas persisting north of 24N and west of 60W
through midweek. Fresh to strong NE to E winds will prevail north
of a stationary front, extending from the central Atlantic
through the Florida Straits, through at least Tue before winds
slowly diminish midweek. Looking ahead, a broad area of low
pressure associated with a tropical wave has formed several
hundred miles south of the Cabo Verde Islands. Environmental
conditions appear conducive for gradual development of this
system, and it could become a tropical depression by the middle
to latter part of next week while moving across the central
tropical Atlantic and approaching portions of the Leeward
Islands. There is a medium chance of tropical development within
the next 7 days.

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

.TONIGHT...E winds 20 to 25 kt. Seas 10 to 11 ft.
.SUN...E winds 15 to 25 kt. Seas 10 to 11 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 9 to 11 ft.
.MON...E winds 15 to 25 kt. Seas 9 to 11 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 9 to 11 ft.
.TUE...E winds 15 to 20 kt. Seas 8 to 10 ft.
.TUE NIGHT...E winds 15 to 20 kt. Seas 7 to 9 ft.
.WED...E winds 10 to 20 kt. Seas 7 to 9 ft.
.WED NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft.
.THU...NE winds 10 to 15 kt. Seas 6 to 7 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.

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

.TONIGHT...E winds 15 to 25 kt W of 70W, and E 10 to 20 kt
elsewhere. Seas 10 to 11 ft.
.SUN...E winds 15 to 25 kt. Seas 9 to 11 ft.
.SUN NIGHT...E winds 15 to 20 kt. Seas 9 to 11 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 25 kt. Seas 8 to 10 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 7 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.
.THU...E winds 10 to 15 kt. Seas 6 to 7 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

Bahamas N of 22N

.TONIGHT...SE winds 10 to 20 kt. Seas 7 to 11 ft.
.SUN...SE winds 10 to 15 kt. Seas 6 to 10 ft.
.SUN NIGHT...E winds less than 10 kt. Seas 6 to 10 ft.
.MON...E winds less than 10 kt. Seas 5 to 8 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 8 ft.
.TUE...E winds 10 to 15 kt. Seas 5 to 8 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 8 ft.
.WED...E winds less than 10 kt. Seas 4 to 7 ft.
.WED NIGHT...E winds less than 10 kt. Seas 4 to 7 ft.
.THU...E winds less than 10 kt. Seas 3 to 4 ft.
.THU NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.

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

.TONIGHT...E winds 10 to 20 kt. Seas 9 to 11 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 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 8 ft.
.WED NIGHT...E winds less than 10 kt. Seas 5 to 7 ft.
.THU...E winds less than 10 kt. Seas 5 to 6 ft.
.THU NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.

ATLC waters S of 22N W of 65W

.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 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.
.THU...E winds less than 10 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.

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

.TONIGHT...E winds 10 to 15 kt. Seas 10 to 11 ft.
.SUN...E winds 10 to 15 kt. Seas 9 to 10 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...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.