000
FZNT31 KNHC 010936
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
536 AM EDT Fri Sep 1 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 tonight 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

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...NE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.MON...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 ft in the morning, subsiding to 2 ft or
less. 
.MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less, building to 3 ft after
midnight. 
.TUE...SE winds 10 to 15 kt. Seas 3 ft. 

Caribbean N of 15N between 72W and 85W

.TODAY...E winds 15 to 25 kt S of 18N, and E 10 to 15 kt
elsewhere. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN NIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds
less than 10 kt, increasing to 10 to 15 kt after midnight. Seas
3 to 4 ft. 
.MON...SE winds 10 to 15 kt. Seas 3 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft or
less elsewhere. 

Caribbean from 11N to 15N W of 72W

.TODAY...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.TONIGHT...NE winds 15 to 25 kt. 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. Seas 4 to 6 ft. 
.SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.MON...SE winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. 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. 

SW Caribbean S of 11N

.TODAY...E winds 10 to 15 kt, shifting to W in the afternoon.
Seas 3 to 5 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 4 to 6 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...NE winds 10 to 15 kt, shifting to W in the afternoon.
Seas 3 to 5 ft. 
.SUN NIGHT...W winds less than 10 kt. Seas 3 to 4 ft.
.MON...W winds less than 10 kt. Seas 3 ft. 
.MON NIGHT...NW winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.TUE...Variable winds less than 10 kt. Seas 2 ft or less. 

Caribbean between 64W and 72W

.TODAY...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 4 to 6 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...Gulf of Venezuela, E winds 10 to 15 kt, shifting to NW in
the afternoon. Elsewhere, E winds 10 to 20 kt. Seas 2 ft or less
Gulf of Venezuela, and 3 to 5 ft elsewhere. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere. 
.MON...Gulf of Venezuela, SE winds 10 to 15 kt, shifting to NW
in the afternoon. Elsewhere, E winds 10 to 20 kt. Seas 2 ft or
less Gulf of Venezuela, and 4 to 6 ft elsewhere. 
.MON NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere. 
.TUE...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and
4 to 6 ft elsewhere. 

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

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN...SE 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 4 to 6 ft. 
.TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. 

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

.TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...E winds 10 to 20 kt. Seas 4 to 5 ft. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 5 ft. 
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. 

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Post-Tropical Cyclone Idalia is near 32.6N 69.8W at
5 AM EDT, and is moving east-southeast at 14 kt. Maximum
sustained winds are 50 kt with gusts to 60 kt, and the minimum
central pressure is 998 mb. Idalia will become extratropical and
move to 31.8N 67.9W this afternoon, 31.0N 66.3W Sat morning,
31.0N 65.2W Sat afternoon, 31.7N 63.6W Sun morning, 33.2N 61.8W
Sun afternoon, and 34.6N 60.2W Mon morning. Gale force winds and
rough to very rough seas associated with the southern periphery
of Idalia will impact the north waters today through the
weekend. Newly upgraded Tropical Depression Gert is near 28.7N
55.0W at 5 AM EDT, and is moving east at 7 kt. Maximum sustained
winds are 30 kt with gusts to 40 kt, and the minimum central
pressure is 1008 mb. Gert will strengthen to a tropical storm
near 28.7N 54.0W this afternoon, move to 29.1N 53.1W Sat
morning, weaken to a tropical depression near 29.7N 52.6W Sat
afternoon, 30.7N 52.2W Sun morning, 32.3N 51.8W Sun afternoon,
and 34.7N 51.7W Mon morning. Gert will dissipate early Tue.
Strong winds and moderate seas will impact the outer forecast
waters due to Gert through this morning. 

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

.TODAY...NE winds 10 to 15 kt. Seas 6 to 8 ft. 
.TONIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft. 
.SAT...NE winds 10 to 15 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 7 to 8 ft. 
.SUN...NE winds 10 to 15 kt. Seas 7 to 8 ft. 
.SUN NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON...NE winds less than 10 kt. Seas 5 to 7 ft. 
.MON NIGHT...E winds less than 10 kt. Seas 5 to 7 ft.
.TUE...NE winds less than 10 kt. Seas 4 to 6 ft. 

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

...GALE WARNING...

.TODAY...TROPICAL STORM CONDITIONS POSSIBLE. NW winds 30 to
40 kt. Seas 9 to 14 ft. 
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 20 to
30 kt W of 70W, and W 25 to 35 kt elsewhere. Seas 10 to 15 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 20 to 30 kt
W of 70W, and NW 20 to 30 kt elsewhere. Seas 9 to 14 ft W of
70W, and 11 to 16 ft elsewhere. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 15 to
25 kt W of 70W, and NW 20 to 30 kt elsewhere. Seas 10 to 15 ft. 
.SUN...NE winds 10 to 20 kt W of 70W, and N 20 to 30 kt
elsewhere. Seas 8 to 12 ft W of 70W, and 10 to 14 ft elsewhere. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft W of 70W, and
9 to 12 ft elsewhere. 
.MON...NE winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 7 to 10 ft. 
.MON NIGHT...NE winds less than 10 kt. Seas 6 to 8 ft. 
.TUE...N winds less than 10 kt. Seas 5 to 7 ft. 

Bahamas N of 22N

.TODAY...NE winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to
3 to 4 ft after midnight. 
.SAT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. 
.SUN...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 3 to 5 ft. 
.TUE...E winds less than 10 kt. Seas 3 to 5 ft. 

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

.TODAY...SW winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT...NW winds 10 to 20 kt. Seas 7 to 10 ft. 
.SAT NIGHT...NW winds 10 to 20 kt. Seas 7 to 10 ft. 
.SUN...NW winds 10 to 15 kt. Seas 7 to 10 ft. 
.SUN NIGHT...N winds 10 to 15 kt. Seas 7 to 9 ft. 
.MON...NE winds less than 10 kt W of 70W, and W 10 to 15 kt
elsewhere. Seas 6 to 8 ft. 
.MON NIGHT...NE winds less than 10 kt W of 70W, and NW 10 to
15 kt elsewhere. Seas 6 to 7 ft. 
.TUE...NE winds less than 10 kt. Seas 5 to 7 ft. 

ATLC waters S of 22N W of 65W

.TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.SAT...E winds 10 to 15 kt, shifting to SE in the afternoon.
Seas 3 to 5 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...SE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 4 to 6 ft. 
.SUN NIGHT...E winds 10 to 15 kt, shifting to SE after midnight.
Seas 4 to 6 ft. 
.MON...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt, diminishing to less than
10 kt after midnight. Seas 3 to 5 ft. 
.TUE...SE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 3 to 5 ft. 

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

.TODAY...SE winds less than 10 kt. Seas 4 to 5 ft. 
.TONIGHT...SE winds less than 10 kt. Seas 4 to 5 ft.
.SAT...S winds less than 10 kt. Seas 4 to 5 ft. 
.SAT NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 4 to 6 ft. 
.SUN...S winds less than 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 5 to 6 ft. 
.SUN NIGHT...S winds less than 10 kt. Seas 6 ft. 
.MON...S winds less than 10 kt. Seas 6 ft. 
.MON NIGHT...S winds less than 10 kt. Seas 5 to 6 ft. 
.TUE...S winds less than 10 kt. Seas 5 to 6 ft.