Offshore Forecast
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000
FZNT31 KNHC 210908
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
508 AM EDT Thu Sep 21 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...Hurricane Maria is centered at 19.6N 68.4W 959 mb at
5 AM EDT moving NW at 8 kt. Maximum sustained winds are 100 kt
with gusts to 120 kt. Maria is forecast to reach near 20.5N
69.3W this afternoon, 21.6N 70.4W tonight, then continue farther
N of the area through the remainder of the week. Tropical storm
conditions remain possible early today for the NE Caribbean near
the Mona Passage. Moderate to fresh trade winds will persist
thereafter across the basin.

NW Caribbean W of 85W

.TODAY...E winds 10 to 20 kt. Seas 3 to 4 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 ft.
.FRI...E winds 10 to 15 kt, shifting to NE in the afternoon.
Seas 3 ft in the morning, subsiding to 2 ft or less.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds 10 to 15 kt. Seas 2 ft or less.
.SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 2 ft or less, building to 3 ft in the
afternoon.
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft.
.MON...SE winds 10 to 20 kt. Seas 4 to 6 ft.

Caribbean N of 15N between 72W and 85W

.TODAY...NE winds 10 to 20 kt. Seas 4 to 6 ft S of 18N, and 2 ft
or less elsewhere.
.TONIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and
2 ft or less elsewhere.
.FRI...S of 18N, N winds 10 to 15 kt, shifting to NW in the
afternoon. Elsewhere, NE winds 10 to 15 kt. Seas 2 ft or less.
.FRI NIGHT...NW winds less than 10 kt S of 18N, and NE 10 to
15 kt elsewhere. Seas 2 ft or less.
.SAT...S of 18N, S winds less than 10 kt. Elsewhere, NE winds
less than 10 kt, shifting to E in the afternoon. Seas 2 ft or
less.
.SAT NIGHT...S of 18N, SE winds less than 10 kt, increasing to
10 to 15 kt after midnight. Elsewhere, E winds 10 to 15 kt. Seas
2 ft or less.
.SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft
or less elsewhere.
.SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and
2 ft or less elsewhere.
.MON...SE 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...Within 90 nm of coast of Colombia, E winds less than
10 kt in the morning, becoming variable winds less than 10 kt.
Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt
in the afternoon. Seas 4 to 6 ft.
.TONIGHT...Within 90 nm of coast of Colombia, NW winds 10 kt in
the evening, becoming variable winds less than 10 kt. Elsewhere,
N winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...W winds less than 10 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds less than 10 kt. Seas 3 ft.
.SAT...SE winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 2 ft or less.
.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...SE winds 10 to 20 kt. Seas 4 to 6 ft.

SW Caribbean S of 11N

.TODAY...E winds less than 10 kt in the morning, becoming
variable winds less than 10 kt. Seas 3 to 5 ft.
.TONIGHT...N winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 to 5 ft.
.FRI...SW winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...N winds less than 10 kt in the evening, becoming
variable winds less than 10 kt. Seas 3 to 4 ft.
.SAT...S winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.SAT NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SUN...SE winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 2 ft or less.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 ft or less.
.MON...SW winds 10 to 15 kt. Seas 2 ft or less.

Caribbean between 64W and 72W

.TODAY...TROPICAL STORM CONDITIONS POSSIBLE N of 16N between 65W
and 72W early today. S winds 20 to 30 kt elsewhere. Seas 6 to 9
ft.
.TONIGHT...N winds 10 kt Gulf of Venezuela, and SE 15 to 25 kt
elsewhere. Gulf of Venezuela, seas 3 ft in the evening,
subsiding to 2 ft or less. Elsewhere, seas 5 to 7 ft.
.FRI...Variable winds less than 10 kt Gulf of Venezuela, and SE
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere.
.FRI NIGHT...NE winds less than 10 kt Gulf of Venezuela, and SE
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere.
.SAT...Variable winds less than 10 kt Gulf of Venezuela, and SE
10 to 20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
4 to 6 ft elsewhere.
.SAT NIGHT...SE winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere.
.SUN...SE winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or
less, building to 3 ft in the afternoon. Elsewhere, seas 4 to
6 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 6 ft.

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

.TODAY...E winds 10 to 20 kt. Seas 5 to 7 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft.
.FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.
.SAT...SE 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 5 to 7 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...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...SE winds 10 to 20 kt. Seas 4 to 6 ft.
.TONIGHT...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 4 to 6 ft.
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft.
.SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN...E winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.
.MON...E winds 10 to 20 kt. Seas 5 to 7 ft.

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...Hurricane Maria is centered at 19.6N 68.4W 959 mb at
5 AM EDT moving NW at 8 kt. Maximum sustained winds are 100 kt
with gusts to 120 kt. Maria is forecast to reach near 20.5N
69.3W  this afternoon, 21.6N 70.4W tonight, then turn more
northward to 22.9N 71.1W Fri afternoon, 24.3N 71.7W Fri night,
and 27.4N 72.3W Sat night. Hurricane Maria will gradually weaken
as it moves N of the area through early next week. N swells
across the waters N of 28N will mix with swells from Maria across
the waters between 65W and 75W today.

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

.TODAY...NE winds 10 kt. Seas 4 to 6 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft.
.FRI...NE winds 10 to 15 kt. Seas 7 to 10 ft.
.FRI NIGHT...NE winds 10 to 20 kt. Seas 9 to 14 ft.
.SAT...NE winds 10 to 20 kt. Seas 10 to 15 ft.
.SAT NIGHT...NE winds 10 to 20 kt. Seas 11 to 16 ft.
.SUN...N winds 15 to 25 kt. Seas 11 to 16 ft.
.SUN NIGHT...N winds 10 to 20 kt. Seas 8 to 12 ft.
.MON...N winds 10 to 20 kt. Seas 7 to 10 ft.

ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W

.TODAY...E winds less than 10 kt, increasing to 10 to 15 kt in
the afternoon. Seas 7 to 10 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 8 to 11 ft.
.FRI...E winds 10 to 15 kt. Seas 10 to 15 ft W of 70W, and 9 to
12 ft elsewhere.
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, NE
winds 10 to 20 kt, increasing to 20 to 30 kt after midnight.
Elsewhere, E winds 15 to 25 kt. Seas 13 to 18 ft W of 70W, and
9 to 14 ft elsewhere.
.SAT...HURRICANE CONDITIONS POSSIBLE. W of 70W, NE winds 25 to
35 kt, increasing to 40 to 50 kt in the afternoon,Seas 15 to
20 ft, building to 17 to 27 ft in the afternoon. Elsewhere, SE
winds 25 to 35 kt,Seas 11 to 16 ft.
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SUN...HURRICANE CONDITIONS POSSIBLE.
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE.
.MON...HURRICANE CONDITIONS POSSIBLE.

Bahamas N of 22N

...TROPICAL STORM WARNING...

.TODAY...NE winds 10 to 15 kt. Seas 3 to 5 ft.
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to
20 kt, increasing to 20 to 30 kt after midnight. Seas 4 to 6 ft.
.FRI...TROPICAL STORM CONDITIONS EXPECTED. NE winds 30 to
40 kt. Seas 5 to 7 ft.
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 30 to
40 kt, becoming N 20 to 30 kt after midnight. Seas 6 to 9 ft.
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 20 to 30 kt.
Seas 6 to 9 ft.
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE.
.SUN...NW winds 15 to 25 kt. Seas 6 to 8 ft.
.SUN NIGHT...NW winds 10 to 20 kt. Seas 4 to 6 ft.
.MON...W winds 10 to 20 kt. Seas 3 to 4 ft.

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

...HURRICANE WARNING...

.TODAY...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, E winds
15 to 25 kt, becoming NE 25 to 35 kt in the afternoon.
Elsewhere, E winds 20 to 30 kt, increasing to 30 to 40 kt in the
afternoon. Seas 10 to 15 ft.
.TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, NE
winds 40 to 50 kt, becoming E 75 to 95 kt after midnight,Seas
13 to 18 ft, building to 16 to 21 ft after midnight. Elsewhere,
E winds 45 to 55 kt, increasing to 70 to 80 kt after
midnight,Seas 12 to 17 ft.
.FRI...HURRICANE CONDITIONS EXPECTED. W of 70W, NE winds 75 to
95 kt. Elsewhere, SE winds 75 to 85 kt, diminishing to 45 to
55 kt in the afternoon. Seas 19 to 29 ft W of 70W, and 13 to
18 ft elsewhere.
.FRI NIGHT...HURRICANE CONDITIONS EXPECTED. W of 70W, NE winds
80 to 90 kt. Elsewhere, SE winds 40 to 50 kt, diminishing to
30 to 40 kt after midnight. Seas 22 to 32 ft W of 70W, and 12 to
17 ft elsewhere.
.SAT...HURRICANE CONDITIONS POSSIBLE. W of 70W, N winds 80 to
90 kt, shifting to W 70 to 90 kt in the afternoon. Elsewhere, SE
winds 30 to 40 kt. Seas 23 to 33 ft W of 70W, and 12 to 17 ft
elsewhere.
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SUN...HURRICANE CONDITIONS POSSIBLE.
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE.
.MON...TROPICAL STORM CONDITIONS POSSIBLE.

ATLC waters S of 22N W of 65W

...HURRICANE WARNING...

.TODAY...HURRICANE CONDITIONS. NE winds 80 to 95 kt. Seas 14 to
19 ft.
.TONIGHT...HURRICANE CONDITIONS EXPECTED. E winds 85 to 95 kt.
Seas 15 to 20 ft.
.FRI...HURRICANE CONDITIONS EXPECTED. S winds 85 to 95 kt,
diminishing to 60 to 70 kt in the afternoon. Seas 11 to 16 ft,
subsiding to 8 to 13 ft in the afternoon.
.FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. S winds 30 to
40 kt, becoming SW 20 to 30 kt after midnight. Seas 8 to 13 ft.
.SAT...SW winds 20 to 30 kt. Seas 7 to 10 ft.
.SAT NIGHT...S winds 10 to 20 kt. Seas 6 to 8 ft.
.SUN...S winds 10 to 20 kt. Seas 6 to 8 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft.
.MON...S winds 10 to 15 kt. Seas 4 to 6 ft.

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

.TODAY...E winds 15 to 25 kt. Seas 6 to 9 ft.
.TONIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI...SE winds 10 to 20 kt. Seas 6 to 9 ft.
.FRI NIGHT...SE winds 10 to 20 kt. Seas 7 to 8 ft.
.SAT...SE winds 10 to 20 kt. Seas 7 to 8 ft.
.SAT NIGHT...SE winds 10 to 15 kt. Seas 7 to 8 ft.
.SUN...SE winds 10 to 15 kt. Seas 7 to 8 ft.
.SUN NIGHT...SE winds 10 to 15 kt. Seas 7 to 8 ft.
.MON...SE winds 10 to 20 kt. Seas 6 to 7 ft.



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