000
FZNT31 KNHC 311530
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1130 AM EDT Thu Aug 31 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...Fresh to strong trades will pulse in the central
Caribbean through Fri night with moderate seas. Meanwhile,
gentle to moderate winds will prevail in the western Caribbean
with moderate to fresh winds in the eastern Caribbean. Trades
will weaken this weekend as the pressure gradient relaxes and
continue through early next week. 

NW Caribbean W of 85W

.THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.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 15 kt. Seas 2 ft or less. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 6 ft S of 18N,
and 3 to 4 ft elsewhere. 
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft S of 18N, and
3 ft elsewhere. 
.FRI...E winds 10 to 20 kt. Seas 5 to 7 ft S of 18N, and 3 to
4 ft elsewhere. 
.FRI NIGHT...E winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 4 to 6 ft S of 18N, and 3 to 4 ft elsewhere. 
.SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...NE winds 10 to 20 kt. Seas 3 to 4 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.MON...E winds 10 to 15 kt. Seas 2 ft or less. 

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.FRI...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.FRI NIGHT...NE winds 15 to 25 kt within 90 nm of coast of
Colombia, and NE 20 to 30 kt elsewhere. Seas 5 to 7 ft. 
.SAT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.SAT NIGHT...NE winds 10 to 20 kt within 90 nm of coast of
Colombia, and NE 15 to 25 kt elsewhere. Seas 4 to 6 ft. 
.SUN...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.MON...NE winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. 

SW Caribbean S of 11N

.THIS AFTERNOON...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...SE winds 10 to 15 kt, shifting to W in the afternoon.
Seas 3 to 5 ft. 
.FRI NIGHT...NW winds less than 10 kt, shifting to N after
midnight. Seas 3 to 5 ft. 
.SAT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...N winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...NW winds 10 to 15 kt, shifting to W after midnight.
Seas 3 to 4 ft. 
.MON...W winds less than 10 kt. Seas 3 ft. 

Caribbean between 64W and 72W

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 3 to 4 ft Gulf of
Venezuela, and 5 to 7 ft elsewhere. 
.TONIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 5 to 7 ft. 
.FRI...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds 20 to 30 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 4 to 6 ft. 
.SAT...Gulf of Venezuela, E winds 20 to 25 kt, shifting to NE
10 to 20 kt in the afternoon. Elsewhere, E winds 10 to 20 kt.
Seas 4 to 6 ft. 
.SAT NIGHT...NE winds 15 to 25 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 3 to 5 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 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 3 to 5 ft elsewhere. 
.MON...N winds less than 10 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. 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

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT...SE winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft. 

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

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON...E winds 10 to 20 kt. Seas 3 to 5 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Tropical Storm Idalia is near 33.6N 75.8W at 11 AM
EDT, and is moving east at 17 kt. Maximum sustained winds are
50 kt with gusts to 60 kt, and the minimum central pressure is
992 mb. Idalia will become extratropical and move to 33.6N 73.2W
this evening, 32.8N 70.1W Fri morning, 31.7N 68.1W Fri evening,
31.1N 67.3W Sat morning, 31.1N 66.6W Sat evening, and 31.8N
65.3W Sun morning. Idalia will change little in intensity as it
moves to the near 34.3N 62.0W early Mon. Meanwhile, Hurricane
Franklin is near 35.1N 61.6W at 11 AM EDT, and is moving
east-northeast at 12 kt. Maximum sustained winds are 85 kt with
gusts to 105 kt, and the minimum central pressure is 965 mb.
Moderate to fresh winds and rough seas associated with outer
southern periphery of Franklin will continue to impact the
northern waters through tonight. 

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

.THIS AFTERNOON...W winds 20 to 30 kt. Seas 7 to 10 ft. 
.TONIGHT...NW winds 15 to 25 kt, shifting to N 10 to 15 kt after
midnight. Seas 6 to 9 ft. 
.FRI...NE winds 10 to 15 kt. Seas 6 to 8 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft. 
.SAT...NE winds 10 to 15 kt. Seas 7 to 9 ft. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 7 to 9 ft. 
.SUN...NE winds 10 to 15 kt. Seas 7 to 9 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 7 to 9 ft. 
.MON...NE winds 10 kt. Seas 7 to 8 ft. 

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

...TROPICAL STORM WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS EXPECTED. SW winds
30 to 40 kt W of 70W, and SW 15 to 25 kt elsewhere. Seas 7 to
10 ft W of 70W, and 5 to 7 ft elsewhere. 
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. W winds 25 to
35 kt W of 70W, and SW 20 to 30 kt elsewhere. Seas 8 to 11 ft W
of 70W, and 5 to 7 ft elsewhere. 
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. W winds 25 to 35 kt.
Seas 8 to 13 ft W of 70W, and 7 to 10 ft elsewhere. 
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NW winds 20 to
30 kt. Seas 9 to 14 ft W of 70W, and 8 to 11 ft elsewhere. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 20 to 30 kt
W of 70W, and W 25 to 35 kt elsewhere. Seas 9 to 14 ft W of 70W,
and 8 to 13 ft elsewhere. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.SUN...N winds 15 to 25 kt W of 70W, and W 20 to 30 kt
elsewhere. Seas 8 to 12 ft. 
.SUN NIGHT...N winds 10 to 20 kt W of 70W, and NW 20 to 30 kt
elsewhere. Seas 8 to 12 ft. 
.MON...NE winds 10 to 20 kt W of 70W, and NW 15 to 25 kt
elsewhere. Seas 7 to 10 ft. 

Bahamas N of 22N

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 2 ft or less.
.TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.FRI...E winds less than 10 kt, shifting to NE in the afternoon.
Seas 2 ft or less. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.SAT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.MON...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft. 

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

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. 
.FRI...SW winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...NW winds 10 to 20 kt W of 70W, and SW 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.SAT NIGHT...NW winds 10 to 20 kt W of 70W, and SW 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.SUN...NW winds 10 to 20 kt W of 70W, and SW 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.SUN NIGHT...N winds 10 to 15 kt W of 70W, and W 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.MON...N winds less than 10 kt W of 70W, and W 10 to 20 kt
elsewhere. Seas 6 to 7 ft. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 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...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 15 kt, shifting to SE after midnight.
Seas 3 to 5 ft. 
.SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...SE winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 3 to 5 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. 

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

.THIS AFTERNOON...E winds less than 10 kt. Seas 4 to 5 ft. 
.TONIGHT...E winds less than 10 kt. Seas 4 ft. 
.FRI...E winds less than 10 kt. Seas 4 ft. 
.FRI NIGHT...E winds less than 10 kt. Seas 4 ft. 
.SAT...SE winds less than 10 kt. Seas 4 ft. 
.SAT NIGHT...SE winds less than 10 kt. Seas 4 to 5 ft. 
.SUN...S winds less than 10 kt. Seas 4 to 5 ft. 
.SUN NIGHT...S winds less than 10 kt. Seas 5 to 6 ft. 
.MON...S winds less than 10 kt. Seas 5 to 6 ft.