000
FZNT31 KNHC 212031
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
431 PM EDT Sat Oct 21 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 near 17.0N 61.3W at 5 PM EDT, and
is moving north-northwest at 9 kt. Maximum sustained winds are
75 kt with gusts to 90 kt, and the minimum central pressure is
988 mb. Tammy will move to 18.1N 62.1W Sun morning, 19.5N 62.9W
Sun afternoon, 20.9N 63.5W Mon morning, 22.2N 63.7W Mon afternoon,
23.1N 63.6W Tue morning, and 23.8N 63.4W Tue afternoon. Tammy 
will change little in intensity as it moves to near 25.7N 62.7W 
Wed afternoon. A broad area of low pressure located over the 
southwestern Caribbean Sea continues to produce disorganized 
showers and thunderstorms. Some slow development of this system 
is possible before it moves inland over Central America by late 
Monday. A weak cold front will move into the northwest Caribbean 
by late Mon. 

NW Caribbean W of 85W

.TONIGHT...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. 
.TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED...E winds 10 to 20 kt. Seas 4 to 6 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. 

Caribbean N of 15N between 72W and 85W

.TONIGHT...NE winds 10 to 20 kt. Seas 2 ft or less. 
.SUN...NE winds 10 to 15 kt. Seas 3 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.MON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON NIGHT...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.TUE...E winds 10 to 15 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.TUE NIGHT...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.WED...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.WED NIGHT...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.THU...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

.TONIGHT...Within 90 nm of coast of Colombia, NW winds 10 to
15 kt, shifting to N after midnight. Elsewhere, N winds 10 to
20 kt. Seas 3 ft. 
.SUN...Variable winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 20 kt elsewhere. Seas 3 ft. 
.SUN NIGHT...NE winds less than 10 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 3 ft. 
.MON...E winds less than 10 kt within 90 nm of coast of
Colombia, and E 20 to 30 kt elsewhere. Seas 3 to 4 ft. 
.MON NIGHT...NE winds 10 kt within 90 nm of coast of Colombia,
and E 15 to 25 kt elsewhere. Seas 3 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 ft. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.WED...E winds 10 to 15 kt. Seas 2 ft or less. 
.WED NIGHT...SE 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...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 

SW Caribbean S of 11N

.TONIGHT...W winds 10 to 20 kt. Seas 3 ft. 
.SUN...SW winds 10 to 20 kt, becoming S 20 to 30 kt in the
afternoon. Seas 3 ft. 
.SUN NIGHT...SW winds 15 to 25 kt, diminishing to 10 to 15 kt
after midnight. Seas 2 ft or less. 
.MON...SE winds 10 to 20 kt. Seas 2 ft or less. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 2 ft or less. 
.TUE...E winds 10 to 15 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...NW winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less. 
.THU...W winds 10 to 15 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 5 ft elsewhere. 
.SUN...Gulf of Venezuela, NE winds less than 10 kt in the
morning, becoming variable winds less than 10 kt. Elsewhere, E
winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to
4 ft elsewhere. 
.SUN NIGHT...Gulf of Venezuela, NE winds less than 10 kt.
Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less Gulf of Venezuela, and 3 ft
elsewhere. 
.MON...Gulf of Venezuela, E winds less than 10 kt, shifting to
SW in the afternoon. Elsewhere, SE winds 10 to 15 kt. Seas 2 ft
or less Gulf of Venezuela, and 3 ft elsewhere. 
.MON NIGHT...NE winds less than 10 kt Gulf of Venezuela, and NE
10 to 15 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 ft elsewhere. 
.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 3 ft. 
.WED NIGHT...NE winds 10 to 15 kt Gulf of Venezuela, and NE
15 to 25 kt elsewhere. Seas 3 ft. 
.THU...SE winds less than 10 kt Gulf of Venezuela, and NE 15 to
25 kt elsewhere. 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

...HURRICANE WARNING...

.TONIGHT...TROPICAL STORM CONDITIONS. SE winds 60 to 70 kt.
Seas 9 to 14 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 65 to
75 kt, diminishing to 45 to 55 kt in the afternoon. Seas 7 to
10 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to
30 kt. Seas 5 to 7 ft. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 15 to
25 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE NIGHT...SE 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 5 ft. 
.THU...E winds 10 to 20 kt. Seas 4 to 6 ft. 

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

.TONIGHT...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 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...E winds 15 to 25 kt, diminishing to 10 to 15 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 20 kt. Seas 3 to 4 ft. 
.THU...SE winds 10 to 20 kt. Seas 3 to 5 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Tammy is near 17.0N 61.3W at 5 PM EDT, and
is moving north-northwest at 9 kt. Maximum sustained winds are
75 kt with gusts to 90 kt, and the minimum central pressure is
988 mb. Tammy will move to 18.1N 62.1W Sun morning, 19.5N 62.9W
Sun afternoon, 20.9N 63.5W Mon morning, 22.2N 63.7W Mon afternoon,
23.1N 63.6W Tue morning, and 23.8N 63.4W Tue afternoon. Tammy 
will change little in intensity as it moves to near 25.7N 62.7W 
Wed afternoon. Farther W, a cold front extends from 31N70W to 
northern Florida. This front will weaken and stall E of Bermuda 
through eastern Cuba by late Sun. At the same time, a second cold
front will move off the northeast Florida coast, reaching from 
Bermuda to Fort Lauderdale, Florida, on Mon. Looking ahead, high 
pressure building in the wake of the front combined with tropical
cyclone Tammy will bring an increase in winds and seas across 
the forecast area likely Tue through Wed.

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

.TONIGHT...NW winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN...W winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN NIGHT...N winds 10 to 20 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 20 kt. Seas 5 to 7 ft. 
.TUE NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft. 
.WED...E winds 15 to 25 kt. Seas 7 to 9 ft. 
.WED NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft.
.THU...E winds 15 to 25 kt. Seas 7 to 10 ft. 

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

.TONIGHT...W winds 15 to 25 kt. Seas 7 to 10 ft. 
.SUN...W winds 10 to 20 kt. Seas 6 to 9 ft. 
.SUN NIGHT...NW winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.THU...NE winds 15 to 25 kt W of 70W, and NE 25 to 35 kt
elsewhere. Seas 9 to 13 ft W of 70W, and 14 to 19 ft elsewhere. 

Bahamas N of 22N

.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.SUN...NE winds 10 to 15 kt. Seas 3 ft. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 3 ft. 
.MON...NE winds 10 to 20 kt. Seas 2 ft or less. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...NE winds 15 to 25 kt. Seas 3 to 5 ft. 
.TUE NIGHT...NE winds 15 to 25 kt. Seas 4 to 6 ft. 
.WED...NE winds 15 to 25 kt. Seas 4 to 6 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 5 to 7 ft. 
.THU...NE winds 15 to 25 kt. Seas 5 to 7 ft. 

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

.TONIGHT...W of 70W, N winds 10 to 15 kt. Elsewhere, SE winds
15 to 25 kt, shifting to E 10 to 15 kt after midnight. Seas 6 to
8 ft. 
.SUN...NE winds 10 to 15 kt. Seas 6 to 8 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt. Seas 5 to 7 ft W of 70W, and 7 to 10 ft elsewhere. 
.MON...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 20 kt.
Seas 5 to 7 ft W of 70W, and 8 to 11 ft elsewhere.
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 15 to
25 kt. Seas 6 to 8 ft W of 70W, and 8 to 12 ft elsewhere. 
.TUE...HURRICANE CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.THU...NE winds 15 to 25 kt W of 70W, and NE 25 to 35 kt
elsewhere. Seas 10 to 13 ft W of 70W, and 11 to 16 ft elsewhere.
 

ATLC waters S of 22N W of 65W

.TONIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 20 kt.
Seas 4 to 6 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt. Seas 6 to 8 ft. 
.MON...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 15 kt.
Seas 6 to 8 ft. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt. Seas 5 to 7 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.WED NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.THU...NE winds 15 to 25 kt. Seas 6 to 9 ft. 

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

...HURRICANE WARNING...

.TONIGHT...TROPICAL STORM CONDITIONS. SE winds 30 to 40 kt.
Seas 8 to 13 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. E winds 55 to 65 kt,
becoming SE 65 to 75 kt in the afternoon. Seas 10 to 15 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 65 to
80 kt. Seas 11 to 16 ft. 
.MON...TROPICAL STORM CONDITIONS EXPECTED. SE winds 70 to
80 kt. Seas 10 to 15 ft. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 30 to
40 kt. Seas 7 to 10 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...SE winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. 
.THU...E winds 10 to 15 kt. Seas 6 to 9 ft.