000
FZNT31 KNHC 220312
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1112 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 17.8N 61.9W at 11 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 992 mb. Tammy will move to 18.8N 62.5W Sun morning, 20.2N
63.4W Sun evening, and 21.5N 63.9W Mon morning. Hurricane Tammy
will reach 22.6N 63.8W Mon evening, 23.1N 63.6W Tue morning, and
23.5N 63.0W Tue evening. Tammy will change little in intensity
as it moves farther N of the Leeward Islands late Wed. 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. 

NW Caribbean W of 85W

.OVERNIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.SUN...NE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. 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

.OVERNIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.SUN...NE winds 10 to 15 kt. Seas 3 ft. 
.SUN NIGHT...NE 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. Seas 3 to 5 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE NIGHT...NE 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...NE 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

.OVERNIGHT...Variable winds less than 10 kt within 90 nm of
coast of Colombia, and NE 10 to 15 kt elsewhere. 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...NE winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 
.MON...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.TUE...E winds less than 10 kt. Seas 3 ft. 
.TUE NIGHT...NE winds less than 10 kt. Seas 2 ft or less. 
.WED...E winds less than 10 kt. Seas 2 ft or less. 
.WED NIGHT...NE winds less than 10 kt. Seas 2 ft or less. 
.THU...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 

SW Caribbean S of 11N

.OVERNIGHT...W winds 10 to 15 kt. Seas 3 ft. 
.SUN...SW winds 10 to 15 kt. Seas 3 ft. 
.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...S winds less than 10 kt. Seas 2 ft or less. 
.TUE NIGHT...W winds less than 10 kt. Seas 2 ft or less. 
.WED...SW 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, increasing to 10 to 15 kt in the
afternoon. Seas 2 ft or less. 

Caribbean between 64W and 72W

.OVERNIGHT...Gulf of Venezuela, N winds less than 10 kt.
Elsewhere, NE winds less than 10 kt, shifting to N after
midnight. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft
elsewhere. 
.SUN...Gulf of Venezuela, W winds less than 10 kt in the
morning, becoming variable winds less than 10 kt. Elsewhere, NW
winds 10 to 15 kt, shifting to S in the afternoon. Seas 2 ft or
less Gulf of Venezuela, and 3 to 4 ft elsewhere. 
.SUN NIGHT...NE winds less than 10 kt, shifting to E after
midnight. Seas 2 ft or less Gulf of Venezuela, and 3 ft
elsewhere. 
.MON...SE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less Gulf of Venezuela, and 3 ft
elsewhere. 
.MON NIGHT...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. 
.TUE...E winds 10 to 15 kt. Seas 2 ft or less. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.WED...E winds 10 to 15 kt. Seas 3 ft. 
.WED NIGHT...NE winds less than 10 kt Gulf of Venezuela, and NE
10 to 20 kt elsewhere. Seas 3 ft. 
.THU...Gulf of Venezuela, S winds less than 10 kt in the
morning, becoming variable winds less than 10 kt. Elsewhere, E
winds 10 to 20 kt. 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...

.OVERNIGHT...TROPICAL STORM CONDITIONS. SE winds 55 to 65 kt.
Seas 8 to 13 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
70 kt, diminishing to 50 to 60 kt in the afternoon. Seas 7 to
10 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to 
35 kt. Seas 5 to 7 ft. 
.MON...SE winds 15 to 25 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. 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...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.THU...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

.OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...SE 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. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TUE...E winds 10 to 15 kt. 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 15 kt. Seas 3 to 4 ft. 
.THU...SE winds 10 to 15 kt. Seas 3 to 5 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Tammy is near 17.8N 61.9W at 11 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 992 mb. Tammy will move to 18.8N 62.5W Sun morning, 20.2N 
63.4W Sun evening, and 21.5N 63.9W Mon morning. Hurricane Tammy 
will reach 22.6N 63.8W Mon evening, 23.1N 63.6W Tue morning, and 
23.5N 63.0W Tue evening. Tammy will change little in intensity as
it moves farther N of the Leeward Islands late Wed. Farther W, a
cold front has stalled from 31N70W to the northern Peninsula of 
Florida. This front will remain stationary while weakening 
through Sun. A second cold front will move off SE Florida Sun, 
overtake the stationary front Sun night, then reach a Bermuda to 
Fort Lauderdale, Florida, line, Mon. Looking ahead, high pressure
building in the wake of the front combined with the impacts of 
Hurricane Tammy will bring an increase in winds and seas across 
the forecast area Tue into Wed night.

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

.OVERNIGHT...W winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...W winds 10 to 20 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 20 kt. Seas 4 to 6 ft. 
.TUE...NE winds 15 to 25 kt. Seas 5 to 7 ft. 
.TUE NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. 
.WED...E winds 15 to 25 kt. Seas 7 to 9 ft. 
.WED NIGHT...E winds 20 to 30 kt. Seas 7 to 10 ft.
.THU...E winds 20 to 30 kt. Seas 7 to 10 ft. 

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

.OVERNIGHT...W winds 10 to 20 kt. Seas 7 to 10 ft. 
.SUN...W winds 10 to 20 kt. Seas 6 to 9 ft. 
.SUN NIGHT...NW winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON...N winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. 
.TUE...NE winds 15 to 25 kt. Seas 7 to 10 ft. 
.TUE NIGHT...NE winds 20 to 30 kt. Seas 8 to 11 ft. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.THU...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.OVERNIGHT...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 15 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 20 to 30 kt. Seas 4 to 6 ft. 
.WED...NE winds 20 to 30 kt. Seas 4 to 6 ft. 
.WED NIGHT...NE winds 20 to 30 kt. Seas 5 to 7 ft. 
.THU...NE winds 20 to 30 kt. Seas 5 to 7 ft. 

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

.OVERNIGHT...NE winds 10 to 15 kt. Seas 5 to 7 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...HURRICANE CONDITIONS POSSIBLE. NE winds 20 to
30 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...TROPICAL STORM CONDITIONS POSSIBLE. 

ATLC waters S of 22N W of 65W

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

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

...HURRICANE WARNING...

.OVERNIGHT...TROPICAL STORM CONDITIONS. SE winds 35 to 45 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
75 kt. Seas 11 to 16 ft. 
.MON...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
75 kt. Seas 10 to 15 ft. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 35 to
45 kt, becoming S 25 to 35 kt after midnight. Seas 7 to 10 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.THU...SE winds 10 to 15 kt. Seas 6 to 9 ft.