000
FZNT31 KNHC 291526
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1126 AM EDT Wed Sep 29 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 19.4N 57.0W 949 mb at
1500 UTC, moving NW at 8 kt. Maximum sustained winds are 115 kt,
with gusts to140 kt. Sam will move to 20.3N 58.1W this evening,
21.8N 59.6W Thu morning, 23.9N 61.0W Thu evening, then continue
north of the region to southeast of Bermuda by Sat then into the
north central Atlantic. Swells generated by Sam are forecast to
continue off the Leeward Islands through Thu and will begin to
impact the Mona and Anegada Passages later today through Fri.
Meanwhile, gentle trades will prevail over the Caribbean through
Fri. Winds are expected to increase moderate to fresh across the
basin by the weekend. 

NW Caribbean W of 85W

.THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...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 2 ft or less, building to
3 ft after midnight. 
.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 to 4 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, NE winds
less than 10 kt, increasing to 10 to 15 kt after midnight. Seas
2 ft or less. 
.THU...S of 18N, E 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. 
.THU NIGHT...S of 18N, NE winds 10 to 15 kt, shifting to E after
midnight. Elsewhere, NE 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 20 kt. Seas 2 ft or less, building to
3 ft after midnight. 
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...E winds 10 to 20 kt. Seas 3 to 4 ft. 

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds less than 10 kt. Seas 3 ft. 
.TONIGHT...E winds less than 10 kt. Seas 3 ft. 
.THU...E winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 3 ft. 
.THU NIGHT...Within 90 nm of coast of Colombia, NE winds 10 to
15 kt. Elsewhere, NE winds less than 10 kt, shifting to E after
midnight. Seas 2 ft or less, building to 3 ft after midnight. 
.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. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...NW winds less than 10 kt. Seas 3 ft. 
.TONIGHT...NW winds less than 10 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.THU...W winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 2 ft or less. 
.THU NIGHT...N winds less than 10 kt. Seas 2 ft or less. 
.FRI...SE winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...Variable winds less than 10 kt, becoming N less
than 10 kt after midnight. Seas 2 ft or less. 
.SAT...N winds less than 10 kt. Seas 2 ft or less. 
.SAT NIGHT...N winds less than 10 kt. Seas 2 ft or less. 
.SUN...NW winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.THIS AFTERNOON...SE winds less than 10 kt Gulf of Venezuela,
and E 10 to 15 kt elsewhere. Seas 3 ft. 
.TONIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 ft. 
.THU...Gulf of Venezuela, E winds 10 kt in the morning, becoming
variable winds less than 10 kt. Elsewhere, E winds less than
10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft. 
.THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.FRI...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
4 ft elsewhere. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.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. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 20 kt. Gulf of Venezuela, seas 3 ft in the
morning, subsiding to 2 ft or less. Elsewhere, seas 4 to 6 ft. 

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

...TROPICAL STORM WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS. W winds 50 to
60 kt. Seas 6 to 9 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 25 to
35 kt, becoming S 15 to 25 kt after midnight. Seas 6 to 8 ft. 
.THU...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 15 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. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.SUN...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

.THIS AFTERNOON...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU...E winds 10 to 15 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. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.SUN...E winds 10 to 20 kt. Seas 6 to 8 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Sam was near 19.4N 57.0W 949 mb at
1500 UTC, moving NW at 8 kt. Maximum sustained winds are 115 kt
with gusts 140 kt. Sam will move to 20.3N 58.1W this evening,
21.8N 59.6W Thu morning, 23.9N 61.0W Thu evening, 26.6N 61.8W
Fri morning, and 29.4N 61.8W Fri evening. Sam will change little
in intensity as it moves into the north central Atlantic into 
Sun. In addition to hurricane conditions northeast of the Leeward
Islands through today, expect rough seas in the form of swell 
from Sam to impact the area northeast of the Bahamas by Thu. 
Farther west, a weak pressure pattern will maintain light to 
gentle breezes and slight seas through Thu. A weak cold front 
will move from the Carolinas to the central Bahamas by Fri and 
and dissipate by Sat. Stronger high pressure will build in to the
area, which will bring moderate to fresh winds through the 
weekend. 

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

.THIS AFTERNOON...NE winds less than 10 kt. Seas 3 ft. 
.TONIGHT...NE winds less than 10 kt, shifting to E after
midnight. Seas 3 ft. 
.THU...E winds less than 10 kt, shifting to NE in the afternoon.
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 5 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. 

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

.THIS AFTERNOON...NE winds less than 10 kt. Seas 3 to 5 ft. 
.TONIGHT...NE winds less than 10 kt. Seas 3 to 5 ft.
.THU...N winds less than 10 kt, shifting to NE in the afternoon.
Seas 3 to 5 ft. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt. Seas 5 to 7 ft W of 70W, and 7 to 10 ft elsewhere. 
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.SAT...NE winds 10 to 20 kt. Seas 7 to 9 ft W of 70W, and 8 to
11 ft elsewhere. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft W of 70W, and
7 to 10 ft elsewhere. 
.SUN...NE winds 10 to 15 kt. Seas 6 to 8 ft. 

Bahamas N of 22N

.THIS AFTERNOON...NE winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. 
.THU...E winds 10 to 15 kt. Seas 2 ft or less. 
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. 

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

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

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...E winds less than 10 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds less than 10 kt. Seas 3 to 5 ft. 
.THU...E winds less than 10 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 4 to 6 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 5 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. 

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

...HURRICANE WARNING...

.THIS AFTERNOON...HURRICANE CONDITIONS. NE winds 90 to 110 kt.
Seas 10 to 15 ft. 
.TONIGHT...HURRICANE CONDITIONS EXPECTED. NE winds 95 to
115 kt. Seas 11 to 16 ft. 
.THU...HURRICANE CONDITIONS EXPECTED. W winds 95 to 115 kt,
becoming SW 70 to 80 kt in the afternoon. Seas 10 to 15 ft. 
.THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 20 to
30 kt, becoming S 10 to 20 kt after midnight. Seas 8 to 11 ft. 
.FRI...SE winds 10 to 15 kt. Seas 6 to 8 ft. 
.FRI NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.SUN...E winds 10 to 15 kt. Seas 6 to 8 ft.