000
FZNT31 KNHC 230309
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1109 PM EDT Sun Oct 22 2023

Marine Weather HF Voice Broadcast for the Tropical N Atlantic
from 07N to 22N between 55W and 64W, the SW N Atlantic S of
31N W of 65W including 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 between 55W and 64W

.SYNOPSIS...Hurricane Tammy is now a couple hundred miles north
of Anguilla in the northernmost Leeward Islands, continuing to
move farther away from the area. Showers and thunderstorms
continue to show signs of organization in association with a low
pressure system located over the southwestern Caribbean Sea.
Environmental conditions appear to be favorable for development,
and a tropical depression could form before the system moves
inland over Nicaragua by early Tuesday. Regardless of
development, this system could produce heavy rains over portions
of Central America during the next couple of days. 

NW Caribbean W of 85W

.OVERNIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.MON...NE 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 20 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 5 to 7 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.FRI...E winds 10 to 20 kt. Seas 6 to 8 ft. 

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 ft. 
.MON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...E winds 10 to 20 kt. S of 18N, seas 2 ft or less,
building to 3 ft in the afternoon. Elsewhere, seas 3 to 5 ft. 
.TUE NIGHT...NE winds 10 to 15 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.WED...NE winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 4 ft S of 18N, and 5 to 7 ft elsewhere. 
.WED NIGHT...NE winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.THU...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.THU NIGHT...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.FRI...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON...E winds 10 kt within 90 nm of coast of Colombia, and E
15 to 25 kt elsewhere. Within 90 nm of coast of Colombia, seas
3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas
3 to 5 ft. 
.MON NIGHT...NE winds 10 to 15 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 2 ft or less within
90 nm of coast of Colombia, and 3 to 5 ft elsewhere. 
.TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...NE winds less than 10 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.WED...E winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less. 
.WED NIGHT...E winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less. 
.THU...SW winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less,
building to 3 ft in the afternoon. 
.THU NIGHT...SW winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 3 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft. 

SW Caribbean S of 11N

.OVERNIGHT...SW winds 10 to 15 kt. Seas 3 ft. 
.MON...S winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 
.MON NIGHT...E winds less than 10 kt. Seas 2 ft or less. 
.TUE...SE winds less than 10 kt. Seas 2 ft or less. 
.TUE NIGHT...N winds less than 10 kt. Seas 2 ft or less. 
.WED...W winds less than 10 kt. Seas 2 ft or less. 
.WED NIGHT...W winds less than 10 kt. Seas 2 ft or less. 
.THU...W winds less than 10 kt. Seas 2 ft or less. 
.THU NIGHT...W winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less. 
.FRI...W winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 

Caribbean between 64W and 72W

.OVERNIGHT...SE winds 10 to 15 kt. Seas 3 ft. 
.MON...SE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 2 ft or less Gulf of Venezuela, and 3 ft
elsewhere. 
.MON NIGHT...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 ft in the evening, subsiding to 2 ft or less. 
.TUE...E winds 10 to 15 kt. Seas 2 ft or less. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.WED...NE winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 4 ft elsewhere. 
.WED NIGHT...NE winds less than 10 kt Gulf of Venezuela, and NE
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 4 ft elsewhere. 
.THU...Variable winds less than 10 kt Gulf of Venezuela, and E
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere. 
.THU NIGHT...NE winds less than 10 kt Gulf of Venezuela, and NE
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 4 ft elsewhere. 
.FRI...Gulf of Venezuela, Variable winds less than 10 kt,
becoming W 10 kt in the afternoon. Elsewhere, E winds 10 to
20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft
elsewhere. 

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

.OVERNIGHT...SE winds 15 to 25 kt. Seas 5 to 7 ft. 
.MON...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft.
.THU...S winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI...SE winds 10 to 15 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 15 kt. Seas 4 to 6 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TUE...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.THU...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Tammy is near 20.8N 64.0W at 11 PM EDT,
and is moving northwest at 8 kt. Maximum sustained winds are 75 
kt with gusts to 90 kt, and the minimum central pressure is 993 
mb. Tammy will move to 21.5N 63.9W Mon morning, 22.5N 63.4W Mon 
evening, and 23.2N 62.6W Tue morning. Hurricane Tammy will reach 
near 24.0N 61.6W Tue evening, 25.3N 60.4W Wed morning, and 26.6N 
59.5W Wed evening. Tammy will become extratropical SE of Bermuda 
late Thu. Farther west, a stationary front stretches from 31N61W 
to central Cuba. A cold front will move off Florida tonight, then
dissipate as it moves eastward across the northern portions of 
the waters Mon. Looking ahead, high pressure building in the wake
of the front combined with the impacts of Hurricane Tammy will 
bring an increase in winds and seas across the forecast area Mon 
night into Fri night. 

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

.OVERNIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE...NE winds 15 to 25 kt. Seas 5 to 7 ft. 
.TUE NIGHT...E winds 20 to 30 kt. Seas 6 to 8 ft. 
.WED...E winds 20 to 30 kt. Seas 7 to 9 ft. 
.WED NIGHT...E winds 20 to 30 kt. Seas 7 to 9 ft. 
.THU...E winds 20 to 30 kt. Seas 8 to 9 ft. 
.THU NIGHT...E winds 15 to 25 kt. Seas 7 to 9 ft. 
.FRI...E winds 15 to 25 kt. Seas 7 to 9 ft. 

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

.OVERNIGHT...NW winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON...N winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.TUE...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 7 to 10 ft. 
.WED...NE winds 20 to 30 kt. Seas 8 to 12 ft. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 8 to 11 ft W of 70W, and
10 to 15 ft elsewhere. 
.THU...NE winds 20 to 30 kt. Seas 9 to 11 ft W of 70W, and 12 to
17 ft elsewhere. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.OVERNIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.MON...NE winds 10 to 20 kt. Seas 3 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...NE winds 20 to 30 kt. Seas 4 to 6 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 4 to 6 ft. 
.WED...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.THU...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.FRI...NE winds 15 to 25 kt. Seas 5 to 7 ft. 

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

.OVERNIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
15 kt W of 70W, and E 20 to 30 kt elsewhere. Seas 5 to 6 ft W of
70W, and 7 to 10 ft elsewhere. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt
W of 70W, and NE 20 to 30 kt elsewhere. Seas 4 to 6 ft W of 70W,
and 8 to 11 ft elsewhere. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt W of 70W, and NE 15 to 25 kt elsewhere. Seas 5 to 7 ft W
of 70W, and 8 to 11 ft elsewhere. 
.TUE...NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 6 to 9 ft W of 70W, and 8 to 11 ft elsewhere. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 8 to 10 ft W of 70W, and
9 to 12 ft elsewhere. 
.WED...NE winds 20 to 30 kt. Seas 9 to 11 ft W of 70W, and 10 to
13 ft elsewhere. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 10 to 12 ft W of 70W,
and 11 to 14 ft elsewhere. 
.THU...NE winds 20 to 30 kt. Seas 11 to 14 ft. 
.THU NIGHT...NE winds 20 to 30 kt. Seas 11 to 15 ft. 
.FRI...NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 10 to 13 ft W of 70W, and 11 to 16 ft elsewhere.
 

ATLC waters S of 22N W of 65W

.OVERNIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 
30 kt. Seas 6 to 9 ft. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt.
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 5 to 7 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. 
.THU...NE winds 15 to 25 kt. Seas 7 to 10 ft. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.FRI...NE winds 10 to 20 kt. Seas 7 to 10 ft. 

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

...HURRICANE WARNING...

.OVERNIGHT...TROPICAL STORM CONDITIONS. SE winds 60 to 70 kt.
Seas 11 to 16 ft. 
.MON...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
70 kt. Seas 9 to 14 ft. 
.MON NIGHT...TROPICAL STORM CONDITIONS EXPECTED. S winds 35 to
45 kt, diminishing to 25 to 35 kt after midnight. Seas 8 to
11 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. S winds 25 to 35 kt.
Seas 6 to 9 ft. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 20 to 
30 kt. Seas 6 to 8 ft. 
.WED...SW winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED NIGHT...S winds 10 to 20 kt. Seas 7 to 10 ft. 
.THU...S winds 10 to 20 kt. Seas 8 to 11 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 8 to 11 ft. 
.FRI...SE winds 10 to 15 kt. Seas 7 to 10 ft.