474
FZNT31 KNHC 130234
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1034 PM EDT Sat Jul 12 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...1021 mb Atlantic high pressure along 70W will shift
NE and collapse through Sun morning, leaving a weak Atlantic
ridge east of 75W through Mon. High pressure will then build
westward across the region and into Florida Tue through Thu.
This pattern will continue to support pulsing fresh to strong
trades and rough seas across the south-central Caribbean through
Tue then expand across much of the central basin late Tue
through Thu. Fresh E winds are expected across the Gulf of
Honduras through the middle of the week, pulsing to locally
strong Sun night. Moderate to fresh winds and moderate seas are
expected in the eastern Caribbean through the weekend while
gentle to moderate winds and slight to moderate seas will
prevail NW portions.

NW Caribbean W of 85W

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

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and
3 to 5 ft elsewhere.
.SUN...S of 18N, E winds 10 to 20 kt. Elsewhere, E winds 10 to
15 kt, diminishing to less than 10 kt in the afternoon. Seas
6 to 8 ft S of 18N, and 3 to 5 ft elsewhere.
.SUN NIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 5 to 7 ft S of 18N, and 3 to 5 ft elsewhere.
.MON...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 5 to 7 ft S of 18N, and 3 to 4 ft elsewhere.
.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 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 4 to 6 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...E winds 15 to 25 kt within 90 nm of coast of
Colombia, and E 10 to 20 kt elsewhere. Seas 7 to 10 ft.
.SUN...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 20 kt elsewhere. Seas 7 to 10 ft.
.SUN NIGHT...E winds 15 to 25 kt within 90 nm of coast of
Colombia, and E 10 to 20 kt elsewhere. Seas 6 to 9 ft.
.MON...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and E 10 to 20 kt elsewhere. Seas 6 to 9 ft.
.MON NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 9 ft.
.WED NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.THU...E winds 15 to 25 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.

SW Caribbean S of 11N

.OVERNIGHT...NW winds less than 10 kt. Seas 5 to 7 ft.
.SUN...N winds 10 to 15 kt, shifting to S in the afternoon. Seas
5 to 7 ft.
.SUN NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft.
.MON...NE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 5 to 7 ft.
.MON NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft.
.WED...NE winds 10 to 20 kt. Seas 6 to 9 ft.
.WED NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft.
.THU...E winds 10 to 20 kt. Seas 6 to 8 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft.

Caribbean between 64W and 72W

.OVERNIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 5 to 7 ft.
.SUN...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt
elsewhere. Seas 5 to 7 ft.
.SUN NIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 4 to 6 ft.
.MON...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt
elsewhere. 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 4 to 6 ft.
.WED...E winds 10 to 20 kt. Seas 5 to 7 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 15 to 25 kt. Seas 6 to 8 ft.

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

.OVERNIGHT...E winds 10 to 15 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 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.
.TUE...E winds 10 to 15 kt. Seas 3 to 5 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 10 to 15 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 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 5 ft.
.SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 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 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. 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 15 kt. Seas 4 to 6 ft.

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...1021 mb Atlantic high pressure near 29N70W will
shift NE and collapse through Sun morning, leaving a weak
Atlantic ridge along 30N and east of 75W through Mon. High
pressure will then build westward across the region and into
Florida Tue through Thu. A broad area of low pressure is expected
to form over the next several days offshore of the southeastern
U.S. coast and build into the waters north of the Bahamas.
Environmental conditions could become marginally conducive for
the gradual development of this system by mid to late next week
as the system moves generally westward across the Florida
Peninsula and over the eastern and north- central portion of the
Gulf. Regardless of development, active weather is expected over
the waters west of 75W late Sun through Tue associated with this
system. The pressure gradient between the Atlantic ridge building
westward and the area of low pressure will support moderate to
fresh SE to S winds across the Bahamas and through the NW zones
Tue through early Thu.

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

.OVERNIGHT...S winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 ft.
.SUN...SW winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 3 ft.
.MON...S winds less than 10 kt. Seas 3 ft.
.MON NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...S winds 10 to 20 kt. Seas 3 to 4 ft.
.TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.WED...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft.

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

.OVERNIGHT...Variable winds less than 10 kt, becoming SE less
than 10 kt after midnight. Seas 3 ft.
.SUN...S winds less than 10 kt. Seas 3 ft.
.SUN NIGHT...SE winds less than 10 kt. Seas 3 ft.
.MON...S winds less than 10 kt W of 70W, and S 10 to 15 kt
elsewhere. Seas 3 ft.
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 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...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.WED NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft.
.THU...SE winds 10 kt. Seas 3 to 4 ft.
.THU 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 ft, subsiding to
2 ft or less.
.SUN...SE winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...SE winds less than 10 kt. Seas 2 ft or less.
.MON...SE winds less than 10 kt. Seas 2 ft or less.
.MON NIGHT...SE winds 10 to 15 kt. Seas 2 ft or less.
.TUE...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon.
.TUE NIGHT...SE winds 10 to 20 kt. Seas 3 ft.
.WED...SE winds 10 to 20 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft.
.THU...E winds 10 to 20 kt. Seas 3 to 5 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft.

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

.OVERNIGHT...E winds less than 10 kt W of 70W, and Variable less
than 10 kt elsewhere. Seas 3 to 4 ft.
.SUN...SE winds less than 10 kt. Seas 3 ft.
.SUN NIGHT...Variable winds less than 10 kt, becoming SE 10 kt
after midnight. Seas 3 ft.
.MON...W of 70W, SE winds 10 to 15 kt, diminishing to less than
10 kt in the afternoon. Elsewhere, SE winds 10 to 15 kt. Seas
3 to 4 ft.
.MON NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft.
.WED...E winds 10 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...E winds 10 to 15 kt. Seas 4 to 6 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.

ATLC waters S of 22N W of 65W

.OVERNIGHT...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 10 to 15 kt. Seas 3 to 4 ft.
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.TUE...E winds 10 to 15 kt. Seas 3 to 5 ft.
.TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 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.

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

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