000
FZNT31 KNHC 272103
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
503 PM EDT Mon Sep 27 2021

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 Sam was near 16.3N 52.7W 957 mb at
2100 UTC, moving NW at 8 kt. Maximum sustained winds are 105 kt,
with gusts to 130 kt. Sam will move to 17.0N 53.5W Tue morning,
17.8N 54.6W Tue afternoon, 18.8N 55.8W Wed morning, 19.8N 57.3W
Wed afternoon, 21.2N 59.0W Thu morning, and 22.9N 60.5W Thu
afternoon. Sam will change little in intensity as it continues
to move north of the area through Fri. Meanwhile, moderate
trades will continue over much of the Caribbean through Tue.
Fresh trades over the south- central Caribbean will diminish to
gentle to moderate speeds today. Gentle trades will then prevail
over the Caribbean through Fri. Swells generated by Sam are
forecast to continue off the Leeward Islands through the middle
of the week. 

NW Caribbean W of 85W

.TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.TUE...E winds 10 to 15 kt. Seas 3 ft in the morning, subsiding
to 2 ft or less. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.WED...E winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less. 
.WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less.
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less. 
.THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.FRI...E winds 10 to 15 kt. Seas 3 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 ft. 

Caribbean N of 15N between 72W and 85W

.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.TUE...S of 18N, E winds 10 to 15 kt. Elsewhere, NE winds 10 to
15 kt, shifting to E in the afternoon. Seas 2 ft or less. 
.TUE NIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less. 
.WED...S of 18N, E winds 10 to 15 kt, diminishing to less than
10 kt in the afternoon. Elsewhere, E winds less than 10 kt. Seas
2 ft or less. 
.WED NIGHT...E winds less than 10 kt S of 18N, and NE 10 to
15 kt elsewhere. Seas 2 ft or less. 
.THU...E winds less than 10 kt S of 18N, and E 10 to 15 kt
elsewhere. Seas 2 ft or less. 
.THU NIGHT...S of 18N, E winds less than 10 kt. Elsewhere, NE
winds less than 10 kt, shifting to E after midnight. Seas 2 ft
or less. 
.FRI...E winds 10 to 15 kt. Seas 2 ft or less. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. 

Caribbean from 11N to 15N W of 72W

.TONIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.WED...NE winds 10 to 15 kt, shifting to E in the afternoon.
Seas 3 ft. 
.WED NIGHT...NE winds less than 10 kt. Seas 3 ft. 
.THU...E winds less than 10 kt. Seas 3 ft. 
.THU NIGHT...E winds less than 10 kt. Seas 2 ft or less,
building to 3 ft after midnight. 
.FRI...E winds less than 10 kt. Seas 3 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. 

SW Caribbean S of 11N

.TONIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. 
.TUE...N winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft. 
.WED...NW winds less than 10 kt. Seas 3 ft. 
.WED NIGHT...Variable winds less than 10 kt, becoming W less
than 10 kt after midnight. Seas 3 ft in the evening, subsiding
to 2 ft or less. 
.THU...Variable winds less than 10 kt. Seas 2 ft or less. 
.THU NIGHT...SW winds less than 10 kt. Seas 2 ft or less. 
.FRI...Variable winds less than 10 kt. Seas 2 ft or less. 
.FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. 
.SAT...Variable winds less than 10 kt, becoming NW less than
10 kt in the afternoon. Seas 2 ft or less. 

Caribbean between 64W and 72W

.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.WED...Gulf of Venezuela, E winds 10 to 15 kt, shifting to SW in
the afternoon. Elsewhere, E winds 10 to 15 kt. Seas 3 to 4 ft. 
.WED NIGHT...Gulf of Venezuela, E winds less than 10 kt.
Elsewhere, E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 ft. 
.THU...NE winds less than 10 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...NE winds less than 10 kt Gulf of Venezuela, and E 10 to
15 kt elsewhere. Seas 3 to 4 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 5 ft elsewhere. 
.SAT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or
less, building to 3 ft in the afternoon. Elsewhere, seas 3 to
5 ft. 

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

...HURRICANE WARNING...

.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 15 to
25 kt. Seas 5 to 7 ft. 
.TUE...TROPICAL STORM CONDITIONS EXPECTED. NE winds 25 to
35 kt, increasing to 55 to 65 kt in the afternoon. Seas 7 to
10 ft. 
.TUE NIGHT...HURRICANE CONDITIONS EXPECTED. N winds 90 to
100 kt. Seas 8 to 13 ft. 
.WED...TROPICAL STORM CONDITIONS EXPECTED. N winds 80 to 90 kt,
becoming SW 35 to 45 kt in the afternoon. Seas 8 to 13 ft. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 20 to
30 kt. Seas 7 to 10 ft. 
.THU...SE winds 15 to 25 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 6 to 9 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 6 to 8 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. 
.TUE...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.WED...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...A cold front extending from 31N65W to the northern
Bahamas will stall this evening and dissipate overnight, leaving
generally light to gentle breezes and slight seas into mid week 
west of 65W. Meanwhile, Hurricane Sam was near 16.3N 52.7W
957 mb at 2100 UTC, moving NW at 8 kt. Maximum sustained winds 
are 105 kt, with gusts to 130 kt. Sam will move to 17.0N 53.5W 
Tue morning, 17.8N 54.6W Tue afternoon, then to northeast of the 
Leeward Islands near 18.8N 55.8W by early Wed morning. Sam will 
continue to move northwest to 19.8N 57.3W Wed afternoon, 21.2N 
59.0W Thu morning, and 22.9N 60.5W Thu afternoon. Sam will change
little in intensity as it moves northward to southeast of 
Bermuda through Fri. At a minimum, expect rough seas in the outer
swell from Sam from mid to late week, reaching as far west as 
70W by late Thu. 

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

.TONIGHT...NE winds 10 to 15 kt, shifting to E after midnight.
Seas 3 to 4 ft. 
.TUE...NE winds less than 10 kt. Seas 3 to 4 ft.
.TUE NIGHT...E winds less than 10 kt. Seas 3 ft. 
.WED...N winds less than 10 kt. Seas 3 ft. 
.WED NIGHT...E winds less than 10 kt. Seas 3 ft. 
.THU...E winds less than 10 kt. Seas 3 to 4 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 

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

.TONIGHT...NE winds 10 to 15 kt W of 70W, and E less than 10 kt
elsewhere. Seas 3 to 5 ft. 
.TUE...NE winds 10 to 15 kt W of 70W, and E less than 10 kt
elsewhere. Seas 3 to 4 ft. 
.TUE NIGHT...W of 70W, NE winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Elsewhere, E winds less than 10 kt.
Seas 3 to 4 ft. 
.WED...NE winds less than 10 kt. Seas 3 to 4 ft. 
.WED NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. 
.THU...NE winds 10 to 15 kt W of 70W, and NE less than 10 kt
elsewhere. Seas 3 to 5 ft. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...NE winds 10 to 15 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. 
.FRI NIGHT...NE winds 10 to 20 kt W of 70W, and N 15 to 25 kt
elsewhere. Seas 6 to 8 ft W of 70W, and 9 to 14 ft elsewhere. 
.SAT...NE winds 10 to 20 kt. Seas 6 to 8 ft W of 70W, and 8 to
11 ft elsewhere. 

Bahamas N of 22N

.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.TUE...NE winds 10 to 15 kt. Seas 3 ft in the morning, subsiding
to 2 ft or less. 
.TUE NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.WED...NE winds less than 10 kt. Seas 2 ft or less. 
.WED NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.THU...NE winds 10 to 15 kt. Seas 3 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 

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

.TONIGHT...NE winds 10 to 15 kt W of 70W, and E less than 10 kt
elsewhere. Seas 3 to 4 ft. 
.TUE...E winds 10 to 15 kt W of 70W, and SE less than 10 kt
elsewhere. Seas 3 to 4 ft. 
.TUE NIGHT...W of 70W, E winds 10 to 15 kt. Elsewhere, Variable
winds less than 10 kt, becoming SE 10 kt after midnight. Seas
3 to 5 ft. 
.WED...SE winds less than 10 kt. Seas 3 to 5 ft. 
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU...E winds 10 to 15 kt. Seas 4 to 5 ft W of 70W, and 6 to
9 ft elsewhere. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...NE winds 10 to 20 kt. Seas 6 to 8 ft W of 70W, and 8 to
11 ft elsewhere. 
.FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft W of 70W, and
8 to 11 ft elsewhere. 
.SAT...E winds 10 to 20 kt. Seas 6 to 8 ft. 

ATLC waters S of 22N W of 65W

.TONIGHT...E winds less than 10 kt. Seas 2 ft or less, building
to 3 to 4 ft after midnight. 
.TUE...E winds less than 10 kt. Seas 3 ft. 
.TUE NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. 
.WED...E winds less than 10 kt. Seas 3 to 4 ft. 
.WED NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 4 to 6 ft. 
.THU...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 5 to 7 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. 

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

...HURRICANE WARNING...

.TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE...HURRICANE CONDITIONS POSSIBLE. E winds 20 to 30 kt. Seas
6 to 9 ft. 
.TUE NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 40 to
50 kt, increasing to 80 to 90 kt after midnight. Seas 7 to
10 ft, building to 9 to 14 ft after midnight. 
.WED...HURRICANE CONDITIONS EXPECTED. NE winds 80 to 100 kt.
Seas 12 to 17 ft. 
.WED NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 75 to
95 kt. Seas 14 to 19 ft. 
.THU...HURRICANE CONDITIONS POSSIBLE. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...S winds 10 to 20 kt. Seas 7 to 10 ft. 
.FRI NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. 
.SAT...E winds 10 to 20 kt. Seas 6 to 8 ft.