000
FZNT31 KNHC 201513
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1113 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...Newly upgraded Hurricane Tammy is near 14.1N 58.6W
at 11 AM EDT, and is moving west-northwest at 6 kt. Maximum
sustained winds are 65 kt with gusts to 80 kt, and the minimum
central pressure is 992 mb. Tammy will move through the northern
Leeward Islands through early Sun, reaching 15.1N 59.8W this
evening, 16.4N 60.9W Sat morning, 17.9N 61.9W Sat evening, and
19.3N 62.7W Sun morning before continuing north of the area
through the early part of the week. Elsewhere, a trough will
persist over the northwest Caribbean into Sat. Looking ahead, a
weak cold front will move into the northwest Caribbean by late
Mon, then stall and weaken from eastern Cuba to northern Belize
Tue. 

NW Caribbean W of 85W

.THIS AFTERNOON...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...NE 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 3 to 5 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...N 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

.THIS AFTERNOON...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 2 ft or less. 

SW Caribbean S of 11N

.THIS AFTERNOON...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 less than 10 kt. 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

.THIS AFTERNOON...SE winds less than 10 kt Gulf of Venezuela,
and E 10 to 15 kt elsewhere. 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...NE winds less than 10 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 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere. 
.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...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS. E winds 30 to
40 kt. Seas 8 to 13 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 55 to
65 kt. Seas 9 to 14 ft. 
.SAT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
70 kt. Seas 9 to 14 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
75 kt. Seas 8 to 13 ft, subsiding to 7 to 10 ft after midnight. 
.SUN...HURRICANE CONDITIONS POSSIBLE. SE winds 60 to 70 kt,
diminishing to 30 to 40 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...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS. SE winds 50 to
60 kt. Seas 8 to 11 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 55 to
65 kt, diminishing to 30 to 40 kt after midnight. Seas 6 to
9 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to
30 kt, diminishing to 10 to 20 kt in the afternoon. 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 3 to 5 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...Newly upgraded Hurricane Tammy is near 14.1N 58.6W
at 11 AM EDT, and is moving west-northwest at 6 kt. Maximum 
sustained winds are 65 kt with gusts to 80 kt, and the minimum 
central pressure is 992 mb. Tammy will move through the northern 
Leeward Islands through early Sun, reaching 19.3N 62.7W Sun 
morning, then continuing northward to 20.6N 63.3W Sun evening, 
and 22.0N 63.3W Mon morning, and 24.4N 61.4W by early Tue. 
Farther west, a weak cold front will move off the northeast 
Florida coast overnight, then weaken as it moves eastward over 
the waters north of 27N, before stalling and dissipating east of 
Bermuda early in the week. A second front will follow, moving off
the northeast Florida coast late Sun, reach from Bermuda to West
Palm Beach, Florida by early Mon, then stall along 21N Tue. 

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

.THIS AFTERNOON...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

.THIS AFTERNOON...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 8 to 11 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...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.THIS AFTERNOON...N winds less than 10 kt. 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 to 4 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.MON...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 
.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

.THIS AFTERNOON...SW winds less than 10 kt W of 70W, and SE
10 to 20 kt elsewhere. 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 10 to
15 kt. Seas 6 to 8 ft. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...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 10 to
15 kt. Seas 4 to 6 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
15 kt. Seas 5 to 7 ft. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.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...

.THIS AFTERNOON...E winds 15 to 20 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 20 to 30 kt.
Seas 8 to 12 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to
40 kt, increasing to 55 to 65 kt after midnight. Seas 9 to
14 ft. 
.SUN...HURRICANE CONDITIONS POSSIBLE. SE winds 65 to 75 kt.
Seas 11 to 16 ft. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE.