392
FZNT31 KNHC 171502
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1102 AM EDT Thu Jul 17 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 trade winds will occur in the
central Caribbean and Windward Passage today, with strong winds
expanding into the west-central basin tonight as high pressure
strengthens in the central Atlantic. Periods of near-gale force
winds are likely in the Gulf of Venezuela and offshore of
northern Colombia nightly into this weekend. Rough seas will
occur over the central and southwestern Caribbean through this
weekend, with locally very rough seas expected near and west of
the strongest winds. Winds will diminish slightly on Sat and Sun,
with seas subsiding late Sun into next week. In the Gulf of
Honduras, pulsing fresh winds will occur each afternoon and
evening through Sat. Otherwise, moderate to fresh trade winds and
moderate seas will prevail over the eastern basin into next
week.

NW Caribbean W of 85W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft.
.TONIGHT...E winds 10 to 20 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 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft.
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SUN NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.
.MON...E winds less than 10 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds less than 10 kt. Seas 3 to 4 ft.

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft S of 18N, and
3 to 5 ft elsewhere.
.FRI...E winds 15 to 25 kt S of 18N, and E 10 to 15 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 3 to 5 ft elsewhere.
.FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and
4 to 6 ft elsewhere.
.SAT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft.
.SUN...E winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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.

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds 20 to 30 kt. Seas 7 to 11 ft.
.TONIGHT...E winds 20 to 30 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 12 ft.
.FRI...E winds 20 to 30 kt within 90 nm of coast of Colombia,
and E 15 to 25 kt elsewhere. Seas 9 to 13 ft.
.FRI NIGHT...E winds 20 to 30 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 9 to 13 ft.
.SAT...E winds 20 to 30 kt. Seas 8 to 13 ft.
.SAT NIGHT...NE winds 20 to 25 kt. Seas 8 to 11 ft.
.SUN...E winds 15 to 25 kt. Seas 7 to 10 ft.
.SUN NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft.
.MON...E winds 15 to 25 kt. Seas 6 to 9 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.

SW Caribbean S of 11N

.THIS AFTERNOON...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.TONIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI...NE winds 10 to 15 kt. Seas 7 to 10 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft.
.SAT...E winds 10 to 20 kt. Seas 7 to 10 ft.
.SAT NIGHT...N winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 7 to 10 ft.
.SUN...NE winds 10 to 15 kt. Seas 6 to 9 ft.
.SUN NIGHT...NE winds less than 10 kt. Seas 6 to 8 ft.
.MON...N winds less than 10 kt. Seas 5 to 7 ft.
.MON NIGHT...N winds less than 10 kt. Seas 4 to 6 ft.

Caribbean between 64W and 72W

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 6 to 8 ft.
.TONIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 6 to 8 ft.
.FRI...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 8 ft
elsewhere.
.FRI NIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 6 to 8 ft.
.SAT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.SAT NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft.
.SUN...E winds 15 to 25 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft.
.MON...E winds 15 to 25 kt. Seas 6 to 8 ft.
.MON NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft.

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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...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 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 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 5 to 7 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...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.
.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 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 15 kt. Seas 4 to 6 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Moderate to occasionally fresh E to SE winds are
expected north of the Greater Antilles to 27N through Fri as a
strong pressure gradient prevails between low pressure over the
south-central Caribbean and high pressure in the central
Atlantic. Strong winds will pulse north of Hispaniola and through
the Windward Passage into early Sat. Winds will diminish
slightly Sun into next week as high pressure weakens and drifts
westward over the western Atlantic. Farther north and west,
moderate SE winds will occur off the coast of Florida today, west
of 75W, as low pressure in the north-central Gulf moves
westward. Elsewhere, south of 20N, moderate to occasionally fresh
trade winds and moderate seas will prevail through this weekend.

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

.THIS AFTERNOON...SE winds 10 to 15 kt. Seas 4 to 5 ft.
.TONIGHT...S winds 10 kt. Seas 4 to 5 ft.
.FRI...S winds 10 kt. Seas 4 ft.
.FRI NIGHT...S winds 10 kt. Seas 3 to 4 ft.
.SAT...SW winds less than 10 kt. Seas 3 to 4 ft.
.SAT NIGHT...S winds less than 10 kt. Seas 3 to 4 ft.
.SUN...SW winds less than 10 kt. Seas 3 to 4 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.MON...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...SW winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.

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

.THIS AFTERNOON...SE winds less than 10 kt. Seas 4 to 5 ft.
.TONIGHT...Variable winds less than 10 kt, becoming SE less than
10 kt after midnight. Seas 4 to 5 ft.
.FRI...Variable winds less than 10 kt. Seas 4 to 5 ft.
.FRI NIGHT...Variable winds less than 10 kt. Seas 4 ft.
.SAT...Variable winds less than 10 kt. Seas 4 ft.
.SAT NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft.
.SUN...S winds less than 10 kt. Seas 3 to 4 ft.
.SUN NIGHT...S winds less than 10 kt. Seas 3 to 4 ft.
.MON...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft.

Bahamas N of 22N

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI...E winds 10 to 20 kt. Seas 3 to 5 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. 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 ft.
.MON...E winds less than 10 kt. Seas 3 ft.
.MON NIGHT...SE winds less than 10 kt. Seas 2 ft or less,
building to 3 ft after midnight.

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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...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. Seas 4 to 6 ft.
.SAT...E winds 10 kt. Seas 4 to 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.SUN...SE winds less than 10 kt. Seas 4 to 5 ft.
.SUN NIGHT...SE winds less than 10 kt. Seas 3 to 4 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 5 ft.

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 6 to 8 ft.
.TONIGHT...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.
.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 10 to 15 kt. Seas 3 to 5 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...E winds 10 to 15 kt. Seas 3 to 5 ft.

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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.FRI...E winds 10 to 15 kt. Seas 5 to 6 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 5 ft.
.SAT...E winds 10 to 15 kt. Seas 5 ft.
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.
.MON...E winds 10 to 15 kt. Seas 5 to 6 ft.
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.