000
FZNT31 KNHC 200319
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1119 PM 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 13.8N 57.1W at 11 PM
EDT, and is moving west-northwest at 9 kt. Maximum sustained
winds are 50 kt with gusts to 60 kt, and the minimum central
pressure is 1001 mb. Tammy will move to 14.3N 58.2W Fri morning,
15.3N 59.9W Fri evening, then strengthen to a hurricane near
16.6N 61.3W Sat morning. Hurricane Tammy will reach 18.0N 62.0W
Sat evening, 19.7N 62.5W Sun morning, and 21.5N 63.0W Sun
evening. Tammy will change little in intensity as it moves N of
the Leeward Islands late Mon. Elsewhere, a trough will persist
over the northwest Caribbean through Sat. Looking ahead, a weak
front will move into the northwest Caribbean by Mon then stall
through Tue. 

NW Caribbean W of 85W

.OVERNIGHT...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 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 4 to 6 ft. 

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and
2 ft or less elsewhere. 
.FRI...S of 18N, E winds 10 to 15 kt. Elsewhere, N winds less
than 10 kt, shifting to NW in the afternoon. Seas 3 ft. 
.FRI NIGHT...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...NE winds less than 10 kt S of 18N, and NE 10 to
15 kt elsewhere. Seas 2 ft or less. 
.SUN...NE winds 10 to 15 kt. Seas 2 ft or less. 
.SUN NIGHT...S of 18N, E 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. 
.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

.OVERNIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...Within 90 nm of coast of Colombia, N winds less
than 10 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...Within 90 nm of coast of Colombia, Variable winds less
than 10 kt, becoming S less than 10 kt in the afternoon.
Elsewhere, E winds 10 to 15 kt. 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. 

SW Caribbean S of 11N

.OVERNIGHT...NW winds less than 10 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. Seas 3 to 4 ft. 
.SAT...SW winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...W winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 ft. 
.SUN...SW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. 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...SW winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.OVERNIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 3 to 4 ft. 
.FRI...E winds 10 to 20 kt. Gulf of Venezuela, seas 3 ft in the
morning, subsiding to 2 ft or less. Elsewhere, seas 3 to 5 ft. 
.FRI NIGHT...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...TROPICAL STORM CONDITIONS POSSIBLE. SW winds less than
10 kt Gulf of Venezuela, and SE 20 to 25 kt elsewhere. Seas 2 ft
or less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 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...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...

.OVERNIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 25 to
35 kt. Seas 8 to 13 ft. 
.FRI...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to 40 kt,
increasing to 40 to 50 kt in the afternoon. Seas 9 to 14 ft. 
.FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 50 to
60 kt. Seas 9 to 14 ft. 
.SAT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 55 to
65 kt. Seas 8 to 13 ft. 
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE. SE winds 55 to
70 kt. Seas 7 to 10 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 
.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 4 to 6 ft. 

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

...TROPICAL STORM WARNING...

.OVERNIGHT...TROPICAL STORM CONDITIONS. E winds 40 to 50 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 EXPECTED. SE winds 45 to
55 kt, diminishing to 25 to 35 kt after midnight. Seas 5 to
7 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 13.8N 57.1W at 11 PM 
EDT, and is moving west-northwest at 9 kt. Maximum sustained
winds are 50 kt with gusts to 60 kt, and the minimum central
pressure is 1001 mb. Tammy will move to 14.3N 58.2W Fri morning,
15.3N 59.9W Fri evening, then strengthen to a hurricane near
16.6N 61.3W Sat morning. Hurricane Tammy will reach 18.0N 62.0W
Sat evening, 19.7N 62.5W Sun morning, and 21.5N 63.0W Sun
evening. Tammy will change little in intensity as it moves to
the N of the Leeward Islands late Mon. Elsewhere, a stationary
front from 31N58W 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.

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

.OVERNIGHT...NW winds less than 10 kt. Seas 3 to 4 ft. 
.FRI...W winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI NIGHT...W winds 15 to 25 kt. Seas 4 to 6 ft. 
.SAT...NW winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...W winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN...W winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...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 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

.OVERNIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...SW winds 10 to 15 kt W of 70W, and S 15 to 25 kt
elsewhere. Seas 5 to 7 ft. 
.FRI NIGHT...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 W of 70W, and SW 20 to 30 kt
elsewhere. Seas 7 to 10 ft. 
.SAT NIGHT...W winds 10 to 20 kt W of 70W, and W 15 to 25 kt
elsewhere. 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...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...NE winds 15 to 25 kt. Seas 7 to 10 ft. 

Bahamas N of 22N

.OVERNIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.FRI...E winds less than 10 kt, shifting to NW in the afternoon.
Seas 2 ft or less. 
.FRI NIGHT...NW 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 in the evening,
subsiding to 2 ft or less. 
.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

.OVERNIGHT...SE winds 10 to 20 kt. 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...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 9 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...NE winds 10 to 20 kt. Seas 6 to 9 ft. 

ATLC waters S of 22N W of 65W

.OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...E 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. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...NE winds 10 to 20 kt. Seas 4 to 6 ft. 

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

...TROPICAL STORM WARNING...

.OVERNIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.FRI...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.FRI NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to
35 kt. Seas 8 to 13 ft. 
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE. SE winds 30 to
40 kt, increasing to 55 to 65 kt after midnight. Seas 10 to
15 ft. 
.SUN...HURRICANE CONDITIONS POSSIBLE. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...S winds 10 to 15 kt. Seas 5 to 7 ft.