000
FZNT31 KNHC 191458
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1058 AM EDT Thu Oct 19 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 13.6N 55.7W at 11 AM
EDT, and is moving west-northwest at 13 kt. Maximum sustained
winds are 50 kt with gusts to 60 kt, and the minimum central
pressure is 1003 mb. The center of Tammy will move to 14.0N
57.4W this evening, 14.8N 59.2W Fri morning, and 16.0N 60.9W Fri
evening near Guadeloupe. Tammy is forecast to strengthen to a
hurricane near 17.5N 62.1W Sat morning, continue across the
northern Leeward Islands and reach 19.0N 62.8W Sat evening, then
move north of the region through the early part of the week.
Elsewhere, a weakening stationary front extending from eastern
Cuba to the Gulf of Honduras will dissipate later today. Fresh
to locally strong trade winds over the south-central and
southwest Caribbean will diminish tonight. 

NW Caribbean W of 85W

.THIS AFTERNOON...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...N winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI NIGHT...N winds 10 to 20 kt. Seas 3 to 5 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...NE winds 10 to 15 kt. Seas 3 to 4 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TONIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds
10 to 15 kt, diminishing to less than 10 kt after midnight. Seas
3 to 5 ft S of 18N, and 2 ft or less elsewhere.
.FRI...NE winds 10 to 15 kt. Seas 3 ft. 
.FRI NIGHT...N winds 10 to 15 kt. Seas 2 ft or less. 
.SAT...NE winds 10 to 20 kt. Seas 3 ft. 
.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
3 ft. 
.SUN...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.MON...E winds 10 to 15 kt. Seas 3 ft. 

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...Within 90 nm of coast of Colombia, E winds less
than 10 kt, shifting to SE after midnight. Elsewhere, NE winds
10 to 15 kt. Seas 3 to 4 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...Within 90 nm of coast of Colombia, NW winds less
than 10 kt in the evening, becoming variable winds less than
10 kt. Elsewhere, 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...Within 90 nm of coast of Colombia, NE winds less
than 10 kt. Elsewhere, E winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Seas 3 ft. 
.MON...E winds 10 to 15 kt. Seas 3 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...E winds 10 to 20 kt, shifting to SW in the
afternoon. Seas 3 to 5 ft. 
.TONIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...W winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. 
.FRI NIGHT...W winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 ft. 
.SAT...SW winds 10 to 15 kt. Seas 3 ft in the morning, subsiding
to 2 ft or less. 
.SAT NIGHT...W winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 2 ft or less. 
.SUN...S winds less than 10 kt. Seas 2 ft or less. 
.SUN NIGHT...SW winds less than 10 kt. Seas 2 ft or less. 
.MON...SE winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI...Gulf of Venezuela, E winds 10 to 15 kt, shifting to SW in
the afternoon. Elsewhere, E winds 10 to 20 kt. Seas 2 ft or less
Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.FRI NIGHT...Gulf of Venezuela, N winds 10 to 15 kt, shifting to
SE after midnight. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. Gulf of Venezuela,
SW winds less than 10 kt in the morning, becoming variable winds
less than 10 kt. Elsewhere, SE winds 10 to 15 kt. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT NIGHT...Gulf of Venezuela, NE winds less than 10 kt.
Elsewhere, NE winds less than 10 kt, shifting to E after
midnight. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft
elsewhere. 
.SUN...Variable winds less than 10 kt Gulf of Venezuela, and E
10 to 15 kt elsewhere. 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 3 ft. 

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

...TROPICAL STORM WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS EXPECTED. E winds
25 to 35 kt. Seas 8 to 11 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to
40 kt. Seas 8 to 13 ft. 
.FRI...TROPICAL STORM CONDITIONS EXPECTED. E winds 45 to 55 kt.
Seas 9 to 14 ft. 
.FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 45 to
55 kt. Seas 9 to 14 ft. 
.SAT...HURRICANE CONDITIONS POSSIBLE. SE winds 50 to 65 kt.
Seas 9 to 14 ft. 
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...SE winds 10 to 15 kt. 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 40 to
50 kt. Seas 6 to 8 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 45 to
55 kt. Seas 6 to 9 ft. 
.FRI...TROPICAL STORM CONDITIONS EXPECTED. SE winds 45 to
55 kt. Seas 6 to 9 ft. 
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to
30 kt, diminishing to 10 to 20 kt after midnight. Seas 6 to
8 ft. 
.SAT...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...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 15 kt. Seas 4 to 6 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Tropical Storm Tammy is near 13.6N 55.7W at 11 AM
EDT, and is moving west-northwest at 13 kt. Maximum sustained
winds are 50 kt with gusts to 60 kt, and the minimum central
pressure is 1003 mb. Tammy will move through the Leeward Islands
through Sat, intensifying to hurricane strength by Sat morning.
Tammy will reach 19.0N 62.8W Sat evening then continue to move
north of the Leeward Islands to 20.5N 63.3W by Sun morning.
Tammy will change little in intensity as it moves to the
north-northeast across the waters east of 65W through the early
part of the week. Elsewhere, a stationary front from 31N60W to
eastern Cuba will weaken today before dissipating. High pressure
will build over the area in the wake of the front. The next
frontal system will move offshore the southeastern United States
Fri night. Fresh to strong winds and rough seas are forecast
north of 27N Fri night through Sat night with this system. 

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

.THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...N winds 10 to 15 kt, shifting to NW after midnight.
Seas 3 to 4 ft. 
.FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...W winds 15 to 25 kt. Seas 4 to 6 ft. 
.SAT...W winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. 
.SUN...W winds 10 to 15 kt. Seas 4 to 6 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. 

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

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...SW winds 10 to 20 kt W of 70W, and S 15 to 25 kt
elsewhere. Seas 4 to 6 ft W of 70W, and 6 to 8 ft elsewhere. 
.FRI NIGHT...W of 70W, W winds 10 to 20 kt, becoming SW 20 to
30 kt after midnight. Elsewhere, S winds 15 to 25 kt. Seas 5 to
7 ft W of 70W, and 6 to 9 ft elsewhere. 
.SAT...W winds 20 to 30 kt W of 70W, and SW 20 to 30 kt
elsewhere. Seas 8 to 11 ft. 
.SAT NIGHT...W of 70W, W winds 10 to 20 kt. Elsewhere, W winds
15 to 25 kt, diminishing to 10 to 15 kt after midnight. Seas
8 to 11 ft. 
.SUN...W winds 10 to 15 kt. Seas 6 to 9 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, NW
winds 10 to 15 kt. Elsewhere, NW winds 10 to 15 kt, diminishing
to less than 10 kt after midnight. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.FRI...S winds 10 to 15 kt, shifting to NW in the afternoon.
Seas 2 ft or less, building to 3 ft in the afternoon. 
.FRI NIGHT...NW winds less than 10 kt, increasing to 10 to 20 kt
after midnight. Seas 3 ft in the evening, subsiding to 2 ft or
less. 
.SAT...NW winds 10 to 20 kt. Seas 3 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...NE winds less than 10 kt, shifting to N in the afternoon.
Seas 3 to 4 ft in the morning, subsiding to 2 ft or less. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.MON...NE winds 10 to 15 kt. Seas 2 ft or less. 

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

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...SE winds 10 to 15 kt W of 70W, and SE 15 to 25 kt
elsewhere. Seas 4 to 5 ft W of 70W, and 6 to 8 ft elsewhere. 
.FRI...S winds 10 to 20 kt. Seas 4 to 5 ft W of 70W, and 6 to
8 ft elsewhere. 
.FRI NIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft W of 70W, and
6 to 9 ft elsewhere. 
.SAT...SW winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
15 kt. Seas 6 to 8 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 10 to 15 kt,
shifting to SE in the afternoon. 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. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 

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

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 8 to 12 ft. 
.FRI...E winds 15 to 25 kt. Seas 8 to 12 ft. 
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 20 to
30 kt. Seas 8 to 11 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 30 to 40 kt.
Seas 8 to 13 ft. 
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.SUN...HURRICANE CONDITIONS POSSIBLE. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE.