000
FZNT31 KNHC 200914
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
514 AM EDT Fri Oct 20 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...Tropical Storm Tammy is near 14.0N 58.3W at 5 AM
EDT, and is moving west-northwest at 7 kt. Maximum sustained
winds are 50 kt with gusts to 60 kt, and the minimum central
pressure is 1000 mb. Tammy will move to 14.7N 59.4W this
afternoon, 15.9N 60.7W Sat morning, then strengthen to a
hurricane near 17.3N 61.8W Sat afternoon. Hurricane Tammy will
be near 18.8N 62.6W Sun morning, 20.3N 63.2W Sun afternoon, and
21.7N 63.4W Mon morning. Tammy will change little in intensity
as it moves N of the Leeward Islands early Tue. Elsewhere, a
trough will persist over the northwest Caribbean into Sat.
Looking ahead, a weak cold front will move into the northwest
Caribbean by Mon then stall through Tue. 

NW Caribbean W of 85W

.TODAY...N winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT...N winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...NE winds 10 to 15 kt. Seas 3 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 4 ft. 
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. 

Caribbean N of 15N between 72W and 85W

.TODAY...NE winds 10 to 15 kt. Seas 3 ft. 
.TONIGHT...S of 18N, NE winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Elsewhere, N winds 10 to 15 kt. Seas
2 ft or less. 
.SAT...NE winds less than 10 kt S of 18N, and NE 10 to 15 kt
elsewhere. Seas 2 ft or less. 
.SAT NIGHT...S of 18N, NE winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Elsewhere, NE winds 10 to 15 kt. Seas
2 ft or less. 
.SUN...NE winds 10 to 15 kt. Seas 2 ft or less. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.MON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft. 

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...Within 90 nm of coast of Colombia, NW winds 10 to
15 kt, shifting to SE after midnight. Elsewhere, NE winds 10 to
15 kt. Seas 3 to 4 ft. 
.SAT...SW winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 
.SAT NIGHT...NE winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 3 ft. 
.SUN...Variable winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 
.SUN NIGHT...Variable winds less than 10 kt within 90 nm of
coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 
.MON...Variable winds less than 10 kt within 90 nm of coast of
Colombia, and SE 10 to 15 kt elsewhere. Seas 3 ft. 
.MON NIGHT...NE winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 
.TUE...E winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less. 

SW Caribbean S of 11N

.TODAY...W winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 to 4 ft. 
.TONIGHT...W winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft. 
.SAT...SW winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...W winds 10 to 15 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.SUN...SW winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 2 ft or less. 
.MON...S winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less. 
.MON NIGHT...S winds less than 10 kt. Seas 2 ft or less. 
.TUE...SE winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.TODAY...Gulf of Venezuela, E winds 10 to 15 kt, shifting to SE
in the afternoon. Elsewhere, E winds 10 to 20 kt. Seas 3 to
4 ft. 
.TONIGHT...Gulf of Venezuela, NE winds 10 to 15 kt, shifting to
E after midnight. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT...Gulf of Venezuela, SW winds less than 10 kt. Elsewhere, E
winds 10 to 15 kt, shifting to SE in the afternoon. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 15 to
20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft 
elsewhere. 
.SUN...SE winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 4 ft elsewhere. 
.SUN NIGHT...E winds less than 10 kt. Seas 3 ft. 
.MON...E winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere. 
.MON NIGHT...E winds less than 10 kt. Seas 3 ft. 
.TUE...E winds 10 to 15 kt. Seas 3 ft. 

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

...HURRICANE WARNING...

.TODAY...TROPICAL STORM CONDITIONS. E winds 35 to 45 kt. Seas
9 to 14 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 45 to
55 kt. Seas 9 to 14 ft. 
.SAT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 50 to
60 kt. Seas 8 to 13 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 50 to
65 kt. Seas 7 to 10 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 40 to
50 kt, diminishing to 15 to 25 kt in the afternoon. Seas 5 to
7 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 4 to 6 ft. 

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

...TROPICAL STORM WARNING...

.TODAY...TROPICAL STORM CONDITIONS. SE winds 45 to 55 kt. Seas
6 to 9 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 40 to
50 kt, diminishing to 25 to 35 kt after midnight. Seas 6 to
8 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to
30 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. 
.TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 5 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Tropical Storm Tammy is near 14.0N 58.3W at 5 AM
EDT, and is moving west-northwest at 7 kt. Maximum sustained 
winds are 50 kt with gusts to 60 kt, and the minimum central 
pressure is 1000 mb. Tammy will move to 14.7N 59.4W this 
afternoon, 15.9N 60.7W Sat morning, then strengthen to a 
hurricane near 17.3N 61.8W Sat afternoon. Hurricane Tammy will be
near 18.8N 62.6W Sun morning, 20.3N 63.2W Sun afternoon, and 
21.7N 63.4W Mon morning. Tammy will change little in intensity as
it moves N of the Leeward Islands early Tue. Elsewhere, a 
surface trough from 31N58W to eastern Cuba will weaken today 
before dissipating. A cold front will move off the SE U.S. Friday
night then cross northern waters through the weekend. Fresh to 
locally strong winds will develop on both sides of the front. 

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

.TODAY...W winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...W winds 20 to 30 kt. Seas 4 to 6 ft. 
.SAT...NW winds 20 to 30 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NW winds 10 to 20 kt. Seas 5 to 7 ft. 
.SUN...W winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...NW 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 15 kt. Seas 4 to 6 ft. 
.TUE...NE winds 15 to 20 kt. Seas 5 to 7 ft. 

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

.TODAY...SW winds 10 to 20 kt W of 70W, and S 15 to 25 kt
elsewhere. Seas 5 to 7 ft. 
.TONIGHT...W of 70W, SW winds 10 to 20 kt, increasing to 20 to
30 kt after midnight. Elsewhere, S winds 20 to 30 kt. Seas 5 to
7 ft W of 70W, and 7 to 10 ft elsewhere.
.SAT...W winds 20 to 30 kt. Seas 7 to 10 ft. 
.SAT NIGHT...W winds 15 to 25 kt. Seas 7 to 10 ft. 
.SUN...W winds 10 to 15 kt. Seas 6 to 9 ft. 
.SUN NIGHT...NW winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...NE winds 15 to 25 kt. Seas 6 to 9 ft. 

Bahamas N of 22N

.TODAY...E winds less than 10 kt, shifting to N in the
afternoon. Seas 2 ft or less. 
.TONIGHT...N winds less than 10 kt, shifting to W after
midnight. Seas 2 ft or less. 
.SAT...NW winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 
.SAT NIGHT...N winds 10 to 15 kt, shifting to NE after midnight.
Seas 3 to 4 ft. 
.SUN...NE winds less than 10 kt. Seas 3 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.MON...NE winds 10 to 15 kt. Seas 2 ft or less. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. 
.TUE...NE winds 10 to 20 kt. Seas 3 to 5 ft. 

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

.TODAY...W of 70W, S winds 10 to 15 kt, shifting to SW in the
afternoon. Elsewhere, SE winds 10 to 20 kt. Seas 4 to 5 ft W of
70W, and 6 to 8 ft elsewhere. 
.TONIGHT...W of 70W, SW winds less than 10 kt, shifting to S
after midnight. Elsewhere, S winds 10 to 20 kt. Seas 4 to 6 ft W
of 70W, and 6 to 8 ft elsewhere. 
.SAT...SW winds 10 to 20 kt. Seas 4 to 6 ft W of 70W, and 7 to
8 ft elsewhere. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to
25 kt. Seas 6 to 8 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
15 kt. Seas 5 to 7 ft W of 70W, and 8 to 11 ft elsewhere. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 

ATLC waters S of 22N W of 65W

.TODAY...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...S winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to
25 kt. Seas 4 to 6 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
15 kt. Seas 5 to 7 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 10 to
15 kt. Seas 5 to 7 ft. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...NE winds 10 to 15 kt. Seas 4 to 6 ft. 

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

...HURRICANE WARNING...

.TODAY...E winds 15 to 25 kt. Seas 9 to 11 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 35 kt.
Seas 8 to 13 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to
40 kt, increasing to 50 to 60 kt after midnight. Seas 9 to
14 ft. 
.SUN...HURRICANE CONDITIONS POSSIBLE. SE winds 60 to 70 kt.
Seas 10 to 15 ft. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...SW winds 10 to 20 kt. Seas 5 to 7 ft.