000
FZNT31 KNHC 210319
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1119 PM EDT Fri Oct 20 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 14.7N 60.2W at 11 PM EDT,
and is moving west-northwest at 8 kt. Maximum sustained winds
are 70 kt with gusts to 85 kt, and the minimum central pressure
is 992 mb. Tammy will move to 15.8N 61.0W Sat morning, 17.3N
62.0W Sat evening, then reach 18.8N 63.0W Sun morning. Hurricane
Tammy will be near 20.0N 63.8W Sun evening, 21.4N 64.3W Mon
morning, and 22.4N 64.0W Mon evening. Tammy will change little
in intensity as it moves to farther N of the Leeward Islands
late Tue. Elsewhere, a trough will persist over the northwest
Caribbean into Sat. Looking ahead, a weak cold front will move
into the northwest Caribbean by late Mon, then stall and weaken
from eastern Cuba to northern Belize Tue. 

NW Caribbean W of 85W

.OVERNIGHT...N winds 10 to 15 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 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. 

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.SAT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.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
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 2 ft or less, building to 3 to
4 ft in the afternoon. 
.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...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.WED...NE winds 10 to 20 kt. Seas 3 to 5 ft. 

Caribbean from 11N to 15N W of 72W

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

SW Caribbean S of 11N

.OVERNIGHT...W winds 10 to 15 kt. Seas 3 ft. 
.SAT...SW winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...W winds 10 to 15 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.SUN...S winds 10 to 15 kt. Seas 2 ft or less. 
.SUN NIGHT...SW winds less than 10 kt. Seas 2 ft or less. 
.MON...S winds less than 10 kt. 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...NW winds less than 10 kt. Seas 2 ft or less. 
.WED...W winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.OVERNIGHT...E 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 5 ft elsewhere. 
.SAT...Gulf of Venezuela, W winds less than 10 kt. Elsewhere, E
winds 10 to 15 kt, shifting to SE in the afternoon. Seas 2 ft or
less Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SAT NIGHT...NE winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 4 ft elsewhere. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 15 kt. Seas 
2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. 
.SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere. 
.MON...SE 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 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere. 
.TUE...E winds less than 10 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 ft elsewhere. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.WED...E winds 10 to 15 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. E winds 45 to 55 kt,
increasing to 60 to 70 kt after midnight. Seas 9 to 14 ft. 
.SAT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
70 kt. Seas 9 to 14 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. SE winds 65 to
75 kt. Seas 8 to 13 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 65 to
75 kt, diminishing to 50 to 60 kt in the afternoon. Seas 6 to
9 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to
35 kt. Seas 4 to 6 ft. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 10 to
15 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 4 to 6 ft. 
.TUE NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 ft. 
.WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. 

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

...HURRICANE WARNING...

.OVERNIGHT...TROPICAL STORM CONDITIONS. SE winds 60 to 70 kt.
Seas 6 to 8 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 30 to
40 kt, diminishing to 10 to 20 kt in the afternoon. Seas 5 to
7 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 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...E 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 14.7N 60.2W at 11 PM EDT,
and is moving west-northwest at 8 kt. Maximum sustained winds 
are 70 kt with gusts to 85 kt, and the minimum central pressure 
is 992 mb. Tammy will move to 15.8N 61.0W Sat morning, 17.3N 
62.0W Sat evening, then reach 18.8N 63.0W Sun morning. Hurricane 
Tammy will be near 20.0N 63.8W Sun evening, 21.4N 64.3W Mon 
morning, and 22.4N 64.0W Mon evening. Tammy will change little in
intensity as it moves to farther N of the Leeward Islands late 
Tue. Farther west, a weak cold front will move off the northeast 
Florida coast Sat morning, then weaken as it moves eastward over 
the waters north of 27N, before stalling and dissipating east of 
Bermuda early next week. A second front will follow, moving off 
the northeast Florida coast late Sun, reach from Bermuda to West 
Palm Beach, Florida by early Mon.

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

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

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

.OVERNIGHT...SW 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. Seas 7 to 10 ft. 
.SAT NIGHT...W winds 15 to 25 kt. Seas 8 to 11 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...N winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON NIGHT...NE winds 15 to 20 kt. Seas 6 to 8 ft. 
.TUE...NE winds 15 to 20 kt W of 70W, and NE 15 to 25 kt
elsewhere. Seas 7 to 9 ft. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 

Bahamas N of 22N

.OVERNIGHT...SW 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...NE winds 10 to 15 kt. 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. 
.MON...NE winds 10 to 15 kt. Seas 3 ft. 
.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. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.WED...NE winds 10 to 20 kt. Seas 4 to 6 ft. 

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

.OVERNIGHT...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 8 ft. 
.SUN NIGHT...HURRICANE 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. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 

ATLC waters S of 22N W of 65W

.OVERNIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...S 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...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to
20 kt. Seas 5 to 7 ft. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. 
.WED...NE winds 10 to 20 kt. Seas 5 to 7 ft. 

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

...HURRICANE WARNING...

.OVERNIGHT...E winds 15 to 25 kt. Seas 8 to 10 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 35 kt. 
Seas 8 to 12 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to
40 kt. Seas 9 to 14 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 60 to
75 kt. Seas 11 to 16 ft. 
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE. SE winds 65 to
75 kt. Seas 11 to 16 ft. 
.MON...HURRICANE CONDITIONS POSSIBLE. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...SE winds 10 to 15 kt. Seas 5 to 7 ft.