394 
FZNT31 KNHC 281507
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1107 AM EDT Tue Sep 28 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 17.5N 54.3W 952 mb at
1500 UTC, moving NW at 7 kt. Maximum sustained winds are 115 kt
with gusts to 140 kt. Sam will move to 18.2N 55.1W this evening,
then northeast of the Leeward Islands to 19.2N 56.5W Wed
morning, then continue to 20.5N 58.1W Wed evening. Sam will
change little in intensity as it continues to move northward to
southeast of Bermuda through early Sat. Meanwhile, moderate
trades will continue over much of the Caribbean 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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.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, building to
3 ft after midnight. 
.THU...E winds 10 to 15 kt. Seas 3 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less. 
.TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.WED...E winds 10 to 15 kt S of 18N, and E less than 10 kt
elsewhere. Seas 2 ft or less. 
.WED 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. 
.THU...S of 18N, E winds less than 10 kt, increasing to 10 to
15 kt in the afternoon. Elsewhere, E winds 10 to 15 kt. Seas
2 ft or less. 
.THU NIGHT...E winds less than 10 kt S of 18N, and E 10 to 20 kt
elsewhere. Seas 2 ft or less. 
.FRI...E winds 10 to 15 kt. Seas 2 ft or less. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to
3 to 4 ft after midnight. 
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. 

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. 
.WED...E winds 10 to 15 kt. Seas 3 ft. 
.WED NIGHT...NE winds less than 10 kt. Seas 3 ft. 
.THU...Within 90 nm of coast of Colombia, E winds less than
10 kt. Elsewhere, NE winds less than 10 kt, shifting to E in the
afternoon. Seas 2 ft or less. 
.THU NIGHT...E winds less than 10 kt. Seas 2 ft or less. 
.FRI...E winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...N winds 10 to 15 kt, shifting to NW after midnight.
Seas 3 to 4 ft. 
.WED...NW winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 ft. 
.WED NIGHT...W winds less than 10 kt. Seas 3 ft in the evening,
subsiding to 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...S 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

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 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 ft. 
.WED NIGHT...Gulf of Venezuela, NE winds less than 10 kt,
shifting to SE after midnight. Elsewhere, E winds 10 to 15 kt.
Seas 3 ft. 
.THU...Gulf of Venezuela, E winds less than 10 kt in the
morning, becoming variable winds less than 10 kt. Elsewhere, E
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. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 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 3 to 4 ft. 
.SAT...E winds 10 to 20 kt. 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

...HURRICANE WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS. NE winds 40 to
50 kt, increasing to 55 to 65 kt in the afternoon. Seas 7 to
10 ft. 
.TONIGHT...HURRICANE CONDITIONS EXPECTED. NE winds 85 to
105 kt, becoming N 95 to 115 kt after midnight. Seas 8 to 11 ft.
.WED...TROPICAL STORM CONDITIONS EXPECTED. N winds 85 to
105 kt, becoming W 45 to 55 kt in the afternoon. Seas 8 to
11 ft. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 20 to
30 kt. Seas 6 to 9 ft. 
.THU...S winds 10 to 20 kt. Seas 6 to 8 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 4 to 6 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 

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

.THIS AFTERNOON...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...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 20 kt. Seas 4 to 6 ft. 
.THU...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.THU NIGHT...E winds 10 to 20 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...The remnants of a stationary front extend from
31N65W to the northern Bahamas. Light to gentle breezes are 
expected to prevail with slight seas through Thu west of 65W. 
Meanwhile, Hurricane Sam was near 17.5N 54.3W 952 mb at 1500 UTC 
moving NW at 7 kt. Maximum sustained winds are 115 kt with gusts 
to 140 kt. Sam will move to 18.2N 55.1W this evening, 19.2N 56.5W
Wed morning, 20.5N 58.1W Wed evening, 22.0N 59.6W Thu morning, 
24.0N 60.9W Thu evening, and 26.6N 61.5W Fri morning. Sam will 
change little in intensity as it moves north of the area by early
Sat, staying east of Bermuda. At a minimum, expect rough seas in
the outer swell from Sam from mid to late week, reaching as far 
west as 70W by Thu. 

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

.THIS AFTERNOON...NE winds less than 10 kt. Seas 3 ft. 
.TONIGHT...E winds less than 10 kt. Seas 3 ft. 
.WED...N winds less than 10 kt. Seas 3 ft. 
.WED NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.THU...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 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. 

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

.THIS AFTERNOON...NE winds 10 to 15 kt W of 70W, and E less than
10 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...W of 70W, NE winds 10 to 15 kt, diminishing to less
than 10 kt after midnight. Elsewhere, SE winds less than 10 kt.
Seas 3 to 4 ft. 
.WED...NE winds less than 10 kt. Seas 3 to 5 ft. 
.WED NIGHT...NE winds 10 to 15 kt W of 70W, and SE less than
10 kt elsewhere. Seas 4 to 6 ft. 
.THU...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.SAT...NE winds 10 to 20 kt. W of 70W, seas 6 to 9 ft.
Elsewhere, seas 8 to 13 ft, subsiding to 7 to 9 ft in the
afternoon. 

Bahamas N of 22N

.THIS AFTERNOON...NE winds 10 to 15 kt. Seas 2 ft or less. 
.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.WED...NE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 2 ft or less. 
.WED NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.THU...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft
in the afternoon. 
.THU NIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. 

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

.THIS AFTERNOON...NE winds 10 to 15 kt W of 70W, and SE less
than 10 kt elsewhere. Seas 3 to 4 ft. 
.TONIGHT...W of 70W, NE winds 10 to 15 kt, shifting to E after
midnight. Elsewhere, SE winds less than 10 kt. Seas 3 to 5 ft. 
.WED...W of 70W, E winds less than 10 kt, shifting to NE in the
afternoon. Elsewhere, S winds less than 10 kt. Seas 4 to 5 ft. 
.WED NIGHT...NE winds 10 to 15 kt W of 70W, and E less than
10 kt elsewhere. Seas 4 to 6 ft. 
.THU...NE winds 10 to 15 kt. Seas 4 to 5 ft W of 70W, and 6 to
8 ft elsewhere. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. 
.SAT...NE winds 10 to 20 kt. Seas 6 to 8 ft. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...E winds less than 10 kt. Seas 3 ft. 
.TONIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 to 5 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 4 to 6 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.FRI NIGHT...E winds 10 to 20 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...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. E winds
20 to 30 kt, increasing to 30 to 40 kt in the afternoon. Seas
7 to 10 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 40 to
50 kt, becoming NE 65 to 75 kt after midnight. Seas 8 to 13 ft. 
.WED...HURRICANE CONDITIONS EXPECTED. NE winds 90 to 110 kt.
Seas 12 to 17 ft. 
.WED NIGHT...HURRICANE CONDITIONS EXPECTED. N winds 90 to
110 kt. Seas 14 to 19 ft. 
.THU...HURRICANE CONDITIONS POSSIBLE. W winds 85 to 105 kt,
diminishing to 55 to 65 kt in the afternoon. Seas 13 to 18 ft,
subsiding to 9 to 14 ft in the afternoon. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.FRI...S winds 10 to 20 kt. Seas 6 to 9 ft. 
.FRI NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. 
.SAT...SE winds 10 to 15 kt. Seas 5 to 7 ft.