Tropical North Atlantic (Voice) Offshore Forecast


185 
FZNT31 KNHC 240908
OFFN20
Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
508 AM EDT Sun Sep 24 2017
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 ATLC from 07N to 19N
between 55W and 64W
.SYNOPSIS...A relatively weak pressure gradient across the area
will begin to tighten some on Monday allowing for strong
nocturnal trades to develop along the NW coast of Venezuela and
NE coast of Colombia through late Wednesday morning. Strong
trades are expected across the Gulf of Honduras Tuesday night
into early Wednesday, and again Wednesday night into Thursday. 
NW Caribbean W of 85W
.TODAY...SE winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. 
.MON...SE winds 10 to 20 kt. Seas 2 to 3 ft.
.MON NIGHT...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 20 kt. Seas 4 to 6 ft. 
.WED...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.THU...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
Caribbean N of 15N between 72W and 85W
.TODAY...S of 18N, SE winds 10 to 15 kt. Elsewhere, SE to S
winds less than 10 kt. Seas 2 ft or less.
.TONIGHT...S of 18N, E winds 10 to 20 kt. Elsewhere, SE winds
10 to 15 kt after midnight. Seas 3 to 4 ft S of 18N, and 2 to 3
ft elsewhere. 
.MON...SE winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft
or less elsewhere. 
.MON NIGHT...E winds 10 to 20 kt. S of 18N, seas 3 to 5 ft.
Elsewhere, seas 2 to 3 ft.
.TUE...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.THU...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
Caribbean from 11N to 15N W of 72W
.TODAY...NE winds less than 10 kt within 90 nm of coast of
Colombia, and E 10 to 15 kt elsewhere. Seas 2 ft or less. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. 
.MON...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON NIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft. 
.TUE...E winds 10 to 20 kt within 90 nm of coast of Colombia,
and E 15 to 25 kt elsewhere. Seas 4 to 6 ft. 
.TUE NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.WED...E winds 15 to 25 kt within 90 nm of coast of Colombia,
and SE 15 to 25 kt elsewhere. Seas 5 to 7 ft. 
.WED NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
SW Caribbean S of 11N
.TODAY...SE winds less than 10 kt. Seas 2 ft or less. 
.TONIGHT...SE winds less than 10 kt. Seas 2 ft or less. 
.MON...S winds less than 10 kt. Seas 2 ft or less. 
.MON NIGHT...Variable winds less than 10 kt, becoming SW less
than 10 kt after midnight. Seas 2 ft or less. 
.TUE...SW winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 2 ft or less. 
.TUE NIGHT...Variable winds less than 10 kt, becoming SW less
than 10 kt after midnight. Seas 2 to 3 ft.
.WED...SW winds less than 10 kt. Seas 3 to 4 ft. 
.WED NIGHT...W winds less than 10 kt. Seas 3 to 4 ft. 
.THU...SW winds less than 10 kt. Seas 3 to 4 ft. 
Caribbean between 64W and 72W
.TODAY...Gulf of Venezuela, SE winds 10 to 15 kt, shifting to E
in the afternoon,Seas 3 ft in the morning, subsiding to 2 ft or
less. Elsewhere, SE winds 10 to 20 kt,Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or
less, building to 3 to 4 ft after midnight. Elsewhere, seas 4 to
6 ft. 
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 6 to 8 ft. 
.TUE...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt
elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 8 ft elsewhere.
.TUE NIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 6 to 8 ft. 
.WED...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt
elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 6 to 8 ft
elsewhere. 
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela,
and 5 to 7 ft elsewhere. 
Offshore Leeward Islands and adjacent ATLC waters from 15N to
19N W of 55W
.TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.TONIGHT...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 20 kt. Seas 5 to 7 ft. 
.TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.WED...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...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
.TODAY...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED...E winds 10 to 20 kt. Seas 6 to 8 ft. 
.WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.THU...E winds 10 to 20 kt. Seas 5 to 7 ft. 
SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS
.SYNOPSIS...Hurricane Maria centered near 27.9N 72.7W 948 mb at 
5 AM EDT is moving N or 355 degrees at 8 kt. Maximum sustained 
winds are 95 kt with gusts to 150 kt. Maria is forecast to
maintain intensity as it reaches near 28.9N 72.8W early this 
afternoon, to near 30.1N 73.0W late tonight, and weaken a little
as it reaches near 31.2N 73.1W by early Monday afternoon. Maria 
will continue to weaken as it reaches near 32.1N 73.2W late 
Monday night, with maximum sustained winds 85 kt gusts to 105 kt
and continue to further weaken as it reaches N of the area near 
34.0N 73.5W late Tuesday night with maximum sustained winds
75 kt  gusts to 90 kt. A trough will extend SW from the 
N-central waters to the Central Bahamas in the wake of Maria 
through Wednesday night, and become diffuse on Thursday as 
central Atlantic high pressure builds westward across the eastern
portion of the area.
ATLC waters from 27N to 31N W of 77W
.TODAY...N winds 10 to 20 kt. Seas 11 to 16 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 11 to 16 ft. 
.MON...N winds 10 to 20 kt. Seas 11 to 16 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 10 to 14 ft. 
.TUE...NW winds 10 to 20 kt. Seas 9 to 14 ft. 
.TUE NIGHT...W winds 10 to 20 kt. Seas 8 to 13 ft. 
.WED...W winds 10 to 15 kt. Seas 9 to 12 ft. 
.WED NIGHT...NW winds 10 to 15 kt. Seas 8 to 11 ft. 
.THU...NW winds 10 kt. Seas 6 to 9 ft. 
ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W
...HURRICANE WARNING...
...TROPICAL STORM CONDITIONS POSSIBLE TUE THROUGH WED NIGHT...
.TODAY...HURRICANE CONDITIONS. NE winds 75 to 85 kt W of 70W,
and SE 25 to 35 kt elsewhere. Seas 20 to 30 ft W of 70W, and
12 to 17 ft elsewhere. 
.TONIGHT...HURRICANE CONDITIONS EXPECTED. NW winds 75 to 85 kt
W of 70W, and S 25 to 35 kt elsewhere. Seas 20 to 30 ft W of
70W, and 11 to 16 ft elsewhere. 
.MON...HURRICANE CONDITIONS EXPECTED. W winds 70 to 80 kt W of
70W, and S 25 to 35 kt elsewhere. Seas 18 to 28 ft W of 70W, and
11 to 16 ft elsewhere. 
.MON NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, W
winds 65 to 75 kt, diminishing to 45 to 55 kt after
midnight,Seas 16 to 26 ft, subsiding to 17 to 22 ft after
midnight. Elsewhere, S winds 25 to 35 kt,Seas 10 to 15 ft. 
.TUE...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, W winds
35 to 45 kt, diminishing to 25 to 35 kt in the afternoon.
Elsewhere, S winds 20 to 30 kt. Seas 15 to 20 ft W of 70W, and
10 to 15 ft elsewhere. 
.TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED...TROPICAL STORM CONDITIONS POSSIBLE. 
.WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. 
.THU...W winds 10 to 20 kt. Seas 7 to 10 ft. 
Bahamas N of 22N
.TODAY...NW winds 10 to 20 kt. Seas 5 to 7 ft. 
.TONIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON...W winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...NW winds less than 10 kt. Seas 3 to 5 ft. 
.TUE...W winds less than 10 kt. Seas 3 to 5 ft. 
.TUE NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. 
.WED...SE winds less than 10 kt. Seas 3 to 5 ft. 
.WED NIGHT...W winds less than 10 kt. Seas 3 to 5 ft. 
.THU...Variable winds less than 10 kt, becoming SW less than
10 kt in the afternoon. Seas 3 to 5 ft. 
ATLC waters from 22N to 27N between 65W and the Bahamas
...TROPICAL STORM WARNING...
.TODAY...TROPICAL STORM CONDITIONS. SW winds 30 to 40 kt W of
70W, and S 20 to 30 kt elsewhere. W of 70W, seas 12 to 17 ft.
Elsewhere, seas 9 to 14 ft, subsiding to 8 to 11 ft in the
afternoon. 
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 20 to
30 kt W of 70W, and S 15 to 25 kt elsewhere. Seas 10 to 15 ft W
of 70W, and 8 to 11 ft elsewhere. 
.MON...SW winds 10 to 20 kt. Seas 9 to 14 ft W of 70W, and 7 to
10 ft elsewhere. 
.MON NIGHT...SW winds 10 to 20 kt. Seas 8 to 12 ft W of 70W, and
7 to 9 ft elsewhere. 
.TUE...SW winds 10 to 20 kt. Seas 7 to 10 ft. 
.TUE NIGHT...S winds 10 to 15 kt. Seas 7 to 9 ft. 
.WED...S winds 10 to 15 kt. Seas 6 to 9 ft. 
.WED NIGHT...SW winds 10 to 15 kt. Seas 6 to 9 ft. 
.THU...W of 70W, W winds less than 10 kt, shifting to SW in the
afternoon. Elsewhere, S winds 10 to 15 kt. Seas 6 to 9 ft. 
ATLC waters S of 22N W of 65W
.TODAY...S winds 10 to 20 kt. Seas 5 to 7 ft. 
.TONIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON...S winds 10 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.TUE NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.WED...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.THU...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
ATLC waters from 19N to 22N between 55W and 65W
.TODAY...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.TONIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON...SE winds 10 to 15 kt. Seas 5 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. 
.TUE...SE winds 10 to 15 kt. Seas 6 to 7 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. 
.WED...E winds 10 to 20 kt. Seas 6 to 7 ft. 
.WED NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. 
.THU...E winds 10 to 15 kt. Seas 6 to 7 ft.