000
FZNT31 KNHC 230908
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
508 AM EDT Mon Oct 23 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 will continue to move northward
farther away from the area today. Showers and thunderstorms
continue to show signs of organization in association with a low
pressure system located over the southwestern Caribbean Sea.
Environmental conditions appear to be favorable for development,
and a short-lived tropical depression could form before the
system moves inland over Nicaragua by early Tuesday. Regardless
of development, this system could produce heavy rains over
portions of Central America during the next couple of days. 

NW Caribbean W of 85W

.TODAY...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...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. 
.THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. 

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE NIGHT...NE winds 10 to 15 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...NE winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.THU...E winds 10 to 20 kt S of 18N, and E 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.THU NIGHT...E winds 10 to 20 kt S of 18N, and E 15 to 25 kt
elsewhere. Seas 4 to 6 ft. 
.FRI...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

.TODAY...E winds 10 kt within 90 nm of coast of Colombia, and E
15 to 25 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...NE winds 10 to 15 kt within 90 nm of coast of
Colombia, and E 15 to 25 kt elsewhere. Seas 3 to 4 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 ft. 
.TUE NIGHT...NE winds less than 10 kt. Seas 2 ft or less. 
.WED...E winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less. 
.WED NIGHT...E 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...S 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 NIGHT...S winds less than 10 kt within 90 nm of coast of
Colombia, and NE 10 to 15 kt elsewhere. Seas 2 ft or less,
building to 3 ft after midnight. 
.FRI...NE winds 10 to 15 kt. Seas 3 ft. 

SW Caribbean S of 11N

.TODAY...S winds 10 to 20 kt. Seas 2 ft or less. 
.TONIGHT...NE winds 10 to 15 kt, shifting to E after midnight.
Seas 2 ft or less. 
.TUE...SE winds less than 10 kt. Seas 2 ft or less. 
.TUE NIGHT...NW winds less than 10 kt. Seas 2 ft or less. 
.WED...W winds less than 10 kt. Seas 2 ft or less. 
.WED NIGHT...W winds less than 10 kt. Seas 2 ft or less. 
.THU...W winds less than 10 kt. Seas 2 ft or less. 
.THU NIGHT...W winds less than 10 kt. Seas 2 ft or less. 
.FRI...W winds 10 to 15 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.TODAY...SE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 2 ft or less Gulf of Venezuela, and 3 ft
elsewhere. 
.TONIGHT...Gulf of Venezuela, NE winds 10 to 15 kt. Elsewhere, E
winds less than 10 kt, increasing to 10 to 15 kt after midnight.
Seas 3 ft. 
.TUE...E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela,
and 3 ft elsewhere. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.WED...Gulf of Venezuela, E winds 10 kt in the morning, becoming
variable winds less than 10 kt. Elsewhere, NE winds 10 to 20 kt.
Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. 
.WED NIGHT...E 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 5 ft elsewhere. 
.THU...Variable winds less than 10 kt Gulf of Venezuela, and E
15 to 25 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere. 
.THU NIGHT...NE 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 5 ft elsewhere. 
.FRI...Variable winds less than 10 kt Gulf of Venezuela, and E
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere. 

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

.TODAY...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.TONIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft.
.THU...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...SE winds 10 to 15 kt. Seas 5 to 7 ft. 

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

.TODAY...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TUE...SE winds 10 to 15 kt, diminishing to less than 10 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 4 ft. 
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.THU...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Tammy is near 21.4N 64.0W at 5 AM EDT, and
is moving north at 9 kt. Maximum sustained winds are 70 kt with 
gusts to 85 kt, and the minimum central pressure is 993 mb.
Tammy will move to 22.2N 63.7W this afternoon, 23.2N 62.9W Tue 
morning, and 24.1N 61.7W Tue afternoon. Hurricane Tammy will 
25.1N 60.5W Wed morning, 26.5N 59.3W Wed afternoon, and 28.0N 
58.7W Thu morning. Tammy will become extratropical SE of Bermuda 
early Fri. Farther W, a stationary front from near 31N61W to 
central Cuba will remain in place this week and as in interacts 
with Hurricane Tammy, the gradient between it and high pressure 
building in from the United States will increase. This will lead 
to the development of a broad area of strong NE winds and rough 
seas across much of the area west of the boundary starting 
tonight and continuing through the week. 

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

.TODAY...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE...NE winds 15 to 25 kt. Seas 6 to 7 ft. 
.TUE NIGHT...E winds 20 to 30 kt. Seas 6 to 9 ft. 
.WED...E winds 20 to 30 kt. Seas 7 to 10 ft. 
.WED NIGHT...E winds 20 to 30 kt. Seas 8 to 11 ft.
.THU...E winds 20 to 30 kt. Seas 8 to 11 ft. 
.THU NIGHT...E winds 20 to 30 kt. Seas 8 to 11 ft. 
.FRI...E winds 15 to 25 kt. Seas 8 to 11 ft. 

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

.TODAY...N winds 10 to 15 kt. Seas 5 to 7 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. 
.TUE...NE winds 15 to 25 kt. Seas 7 to 9 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 8 to 11 ft. 
.WED...NE winds 20 to 30 kt. Seas 8 to 12 ft W of 70W, and 11 to
13 ft elsewhere. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 9 to 14 ft. 
.THU...NE winds 20 to 30 kt. Seas 9 to 12 ft W of 70W, and 11 to
15 ft elsewhere. 
.THU NIGHT...NE winds 20 to 30 kt. Seas 9 to 13 ft W of 70W, and
13 to 18 ft elsewhere. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.TODAY...NE winds 10 to 20 kt. Seas 3 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. 
.TUE...NE winds 20 to 30 kt. Seas 3 to 5 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.WED...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.THU...E winds 20 to 30 kt. Seas 6 to 8 ft. 
.THU NIGHT...E winds 20 to 30 kt. Seas 6 to 8 ft. 
.FRI...NE winds 15 to 25 kt. Seas 6 to 8 ft. 

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

.TODAY...NE winds 10 to 20 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 5 to 7 ft W of 70W, and 8 to 11 ft elsewhere. 
.TONIGHT...NE winds 10 to 20 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 6 to 8 ft W of 70W, and 8 to 11 ft elsewhere. 
.TUE...NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 7 to 10 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 8 to 12 ft. 
.WED...NE winds 20 to 30 kt. Seas 10 to 12 ft.
.WED NIGHT...NE winds 20 to 30 kt. Seas 10 to 14 ft. 
.THU...NE winds 20 to 30 kt. Seas 11 to 14 ft. 
.THU NIGHT...NE winds 20 to 30 kt. Seas 11 to 14 ft. 
.FRI...NE winds 20 to 30 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 11 to 14 ft. 

ATLC waters S of 22N W of 65W

.TODAY...NE winds 15 to 25 kt. Seas 6 to 9 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.WED...NE winds 10 to 20 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 7 to 10 ft. 
.THU NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. 
.FRI...NE winds 10 to 20 kt. Seas 7 to 10 ft. 

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

...HURRICANE WARNING...

.TODAY...TROPICAL STORM CONDITIONS. SE winds 60 to 70 kt,
diminishing to 45 to 55 kt in the afternoon. Seas 9 to 14 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. S winds 35 to
45 kt, diminishing to 25 to 35 kt after midnight. Seas 7 to
10 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. S winds 25 to 35 kt.
Seas 6 to 9 ft. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 20 to 
30 kt. Seas 6 to 8 ft. 
.WED...SW winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED NIGHT...S winds 10 to 20 kt. Seas 7 to 10 ft. 
.THU...SE winds 10 to 15 kt. Seas 7 to 10 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 7 to 10 ft. 
.FRI...SE winds 10 to 15 kt. Seas 7 to 10 ft.