Offshore Forecast
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000
FZNT31 KNHC 201453
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1050 AM EDT Wed Sep 20 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...Major Hurricane Maria is centered at 18.4N 66.5W
930 mb at 11 AM EDT moving NW, or 305 degrees at 10 kt. Maximum
sustained winds are 120 kt with gusts to 145 kt. Maria is
forecast to reach near 19.2N 67.6W at 8 PM tonight, strengthen
to 125 kt gusts to 150 kt near 20.2N 69.0W at 8 AM Thu, reach
near 21.2N 70.1W at 8 PM Thu, weaken to 120 kt gusts to 145 kt
near 22.4N 71.0W at 8 AM Fri, weaken to 110 kt gusts to 135 kt
near 25.3N 72.4W at 8 AM Sat, then continue to weaken reaching
near 28.5N 73.0W at 8 AM Sun and passing N of area to near 31.5N
73.0W at 8 AM Mon. Elsewhere, moderate to locally fresh trades
will return by Sun evening.

NW Caribbean W of 85W

.THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft.
.THU NIGHT...E winds 10 to 15 kt. Seas 3 ft.
.FRI...E winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.FRI NIGHT...NE winds less than 10 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...E winds less than 10 kt. Seas 2 ft or less.
.SUN...E winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to
3 ft after midnight.

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...NE winds less than 10 kt. Seas 4 to 6 ft S of
18N, and 2 ft or less elsewhere.
.TONIGHT...S of 18N, N winds less than 10 kt. Elsewhere, NE
winds less than 10 kt, increasing to 10 to 15 kt after midnight.
Seas 5 to 7 ft S of 18N, and 3 ft elsewhere.
.THU...N winds less than 10 kt S of 18N, and NE 10 to 15 kt
elsewhere. Seas 4 to 6 ft S of 18N, and 3 ft elsewhere.
.THU NIGHT...S of 18N, N winds less than 10 kt,Seas 3 to 5 ft.
Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt
after midnight,Seas 2 ft or less, building to 3 ft after
midnight.
.FRI...N winds less than 10 kt. Seas 2 ft or less.
.FRI NIGHT...NE winds less than 10 kt. Seas 2 ft or less.
.SAT...E winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 2 ft or less.
.SAT NIGHT...Variable winds less than 10 kt, becoming SE less
than 10 kt after midnight. Seas 2 ft or less.
.SUN...SE winds less than 10 kt. Seas 2 ft or less, building to
3 ft in the afternoon.
.SUN NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 4 ft.

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...Within 90 nm of coast of Colombia, E winds
10 to 15 kt, shifting to NE in the afternoon. Elsewhere, NE
winds less than 10 kt. Seas 4 to 6 ft.
.TONIGHT...NE winds less than 10 kt. Seas 4 to 6 ft.
.THU...NE winds less than 10 kt in the morning, becoming
variable winds less than 10 kt. Seas 4 to 6 ft.
.THU NIGHT...Within 90 nm of coast of Colombia, NW winds 10 kt
in the evening, becoming variable winds less than 10 kt.
Elsewhere, Variable winds less than 10 kt. Seas 4 to 6 ft.
.FRI...Variable winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...Variable winds less than 10 kt. Seas 3 ft.
.SAT...Variable winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.SAT NIGHT...Variable winds less than 10 kt, becoming E less
than 10 kt after midnight. Seas 2 ft or less.
.SUN...E winds less than 10 kt. Seas 3 ft.
.SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 3 to 5 ft.

SW Caribbean S of 11N

.THIS AFTERNOON...Variable winds less than 10 kt. Seas 3 ft.
.TONIGHT...NE winds less than 10 kt. Seas 3 to 4 ft.
.THU...Variable winds less than 10 kt. Seas 3 to 5 ft.
.THU NIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft.
.FRI...Variable winds less than 10 kt. Seas 3 to 5 ft.
.FRI NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft.
.SAT...Variable winds less than 10 kt. Seas 3 ft in the morning,
subsiding to 2 ft or less.
.SAT NIGHT...Variable winds less than 10 kt. Seas 2 ft or less.
.SUN...SE winds less than 10 kt. Seas 2 ft or less.
.SUN NIGHT...S winds less than 10 kt. Seas 2 ft or less.

Caribbean between 64W and 72W

...TROPICAL STORM WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. N winds
less than 10 kt Gulf of Venezuela, and W 30 to 40 kt elsewhere.
Seas 3 to 4 ft Gulf of Venezuela, and 8 to 13 ft elsewhere.
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Gulf of
Venezuela, NE winds 10 kt. Elsewhere, NW winds 30 to 40 kt,
shifting to S 25 to 35 kt after midnight. Seas 3 to 4 ft Gulf of
Venezuela, and 7 to 10 ft elsewhere.
.THU...TROPICAL STORM CONDITIONS POSSIBLE. Variable winds less
than 10 kt Gulf of Venezuela, and S 20 to 30 kt elsewhere. Gulf
of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or
less. Elsewhere, seas 6 to 9 ft.
.THU NIGHT...N winds 10 kt Gulf of Venezuela, and S 15 to 25 kt
elsewhere. Gulf of Venezuela, seas 2 ft or less, building to 3
ft after midnight. 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
4 to 6 ft elsewhere.
.FRI NIGHT...SE winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 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. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere.
.SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft.

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

.THIS AFTERNOON...SE winds 10 to 20 kt. Seas 8 to 13 ft.
.TONIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft.
.THU...E winds 10 to 15 kt. Seas 5 to 7 ft.
.THU NIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 5 to 7 ft.
.FRI...SE winds less than 10 kt. Seas 5 to 7 ft.
.FRI NIGHT...E winds less than 10 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 15 kt. Seas 5 to 7 ft.

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

.THIS AFTERNOON...SE winds 10 to 15 kt. Seas 6 to 8 ft.
.TONIGHT...E winds less than 10 kt, increasing to 10 to 15 kt
after midnight. Seas 5 to 7 ft.
.THU...SE winds 10 to 15 kt. Seas 5 to 7 ft.
.THU NIGHT...E 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 15 kt. Seas 4 to 6 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 5 to 7 ft.
.SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...Residual N swells across the waters N of 28N from
Hurricane Jose will mix with SE swells from Hurricane Maria
across the waters between 65W and 75W tonight and Thu. Major
Hurricane Maria is centered at 18.4N 66.5W 930 mb at 11 AM EDT
moving NW, or 305 degrees at 10 kt. Maximum sustained winds are
120 kt with gusts to 145 kt. Maria is forecast to reach near
19.2N 67.6W at 8 PM tonight, strengthen to 125 kt gusts to 150
kt near 20.2N 69.0W at 8 AM Thu, reach near 21.2N 70.1W at 8 PM
Thu, weaken to 120 kt gusts to 145 kt near 22.4N 71.0W at 8 AM
Fri, weaken to 110 kt gusts to 135 kt near 25.3N 72.4W at 8 AM
Sat, then continue to weaken reaching near 28.5N 73.0W at 8 AM
Sun and passing N of area to near 31.5N 73.0W at 8 AM Mon.

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

.THIS AFTERNOON...Variable winds less than 10 kt. Seas 5 to
7 ft.
.TONIGHT...E winds less than 10 kt. Seas 5 to 7 ft.
.THU...Variable winds less than 10 kt, becoming NE less than
10 kt in the afternoon. Seas 4 to 6 ft.
.THU NIGHT...E winds 10 kt. Seas 6 to 9 ft.
.FRI...NE winds 10 to 15 kt. Seas 8 to 11 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 9 to 14 ft.
.SAT...NE winds 10 to 20 kt. Seas 10 to 15 ft.
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE.
.SUN...TROPICAL STORM CONDITIONS POSSIBLE.
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE.

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

.THIS AFTERNOON...Variable winds less than 10 kt W of 70W, and S
10 kt elsewhere. Seas 7 to 8 ft.
.TONIGHT...SE winds less than 10 kt. Seas 7 to 9 ft.
.THU...Variable winds less than 10 kt. Seas 7 to 10 ft W of 70W,
and 9 to 11 ft elsewhere.
.THU NIGHT...E winds less than 10 kt W of 70W, and SE 10 to 15
kt elsewhere. Seas 8 to 13 ft.
.FRI...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, NE winds
less than 10 kt, increasing to 10 to 15 kt in the afternoon.
Elsewhere, E winds 10 to 15 kt. Seas 10 to 14 ft.
.FRI NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SAT...HURRICANE CONDITIONS POSSIBLE.
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SUN...HURRICANE CONDITIONS POSSIBLE.
.SUN NIGHT...HURRICANE CONDITIONS POSSIBLE.

Bahamas N of 22N

...TROPICAL STORM WARNING...

.THIS AFTERNOON...Variable winds less than 10 kt. Seas 3 to
4 ft.
.TONIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt.
Seas 3 to 5 ft.
.THU NIGHT...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 20
kt, increasing to 30 to 40 kt after midnight. Seas 4 to 6 ft.
.FRI...HURRICANE CONDITIONS POSSIBLE. NE winds 35 to 45 kt.
Seas 6 to 8 ft.
.FRI NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SAT...HURRICANE CONDITIONS POSSIBLE.
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE.
.SUN...TROPICAL STORM CONDITIONS POSSIBLE.
.SUN NIGHT...NW winds 10 to 15 kt, shifting to W after midnight.
Seas 4 to 6 ft.

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

...HURRICANE WARNING...

.THIS AFTERNOON...SE winds less than 10 kt W of 70W, and SE
10 to 15 kt elsewhere. Seas 6 to 7 ft W of 70W, and 7 to 10 ft
elsewhere.
.TONIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15
kt W of 70W, and E 15 to 25 kt elsewhere. W of 70W, seas 6 to 7
ft, building to 7 to 10 ft after midnight. Elsewhere, seas 8 to
11 ft, building to 9 to 14 ft after midnight.
.THU...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, E winds 10
to 20 kt, becoming NE 35 to 45 kt in the afternoon.
Elsewhere, E winds 20 to 30 kt, increasing to 35 to 45 kt in the
afternoon. Seas 10 to 15 ft W of 70W, and 12 to 17 ft elsewhere.
.THU NIGHT...HURRICANE CONDITIONS EXPECTED. W of 70W, NE winds
50 to 60 kt, becoming E 85 to 105 kt after midnight. Elsewhere,
E winds 50 to 60 kt, increasing to 70 to 80 kt after midnight.
Seas 14 to 19 ft.
.FRI...HURRICANE CONDITIONS POSSIBLE. W of 70W, NE winds 85 to
105 kt,Seas 18 to 28 ft, building to 21 to 31 ft in the
afternoon. Elsewhere, SE winds 55 to 65 kt, diminishing to 40 to
50 kt in the afternoon,Seas 15 to 20 ft.
.FRI NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SAT...HURRICANE CONDITIONS POSSIBLE.
.SAT NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SUN...HURRICANE CONDITIONS POSSIBLE.
.SUN NIGHT...S winds 10 to 20 kt. Seas 8 to 11 ft.

ATLC waters S of 22N W of 65W

...HURRICANE WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS. NE winds 40 to
50 kt, increasing to 50 to 60 kt in the afternoon. Seas 8 to 11
ft.
.TONIGHT...HURRICANE CONDITIONS EXPECTED. NE winds 85 to 105 kt.
Seas 11 to 16 ft, building to 16 to 21 ft after midnight.
.THU...HURRICANE CONDITIONS EXPECTED. E winds 85 to 105 kt.
Seas 16 to 21 ft.
.THU NIGHT...HURRICANE CONDITIONS EXPECTED. SE winds 85 to 105
kt. Seas 17 to 22 ft.
.FRI...HURRICANE CONDITIONS POSSIBLE. S winds 90 to 100 kt,
diminishing to 45 to 55 kt in the afternoon. Seas 13 to 18 ft,
subsiding to 10 to 15 ft in the afternoon.
.FRI NIGHT...HURRICANE CONDITIONS POSSIBLE.
.SAT...TROPICAL STORM CONDITIONS POSSIBLE.
.SAT NIGHT...S winds 10 to 20 kt. Seas 6 to 8 ft.
.SUN...S winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...S winds 10 to 15 kt, diminishing to less than 10 kt
after midnight. Seas 4 to 6 ft.

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

...TROPICAL STORM WARNING...

.THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. E winds
25 to 35 kt. Seas 8 to 11 ft.
.TONIGHT...E winds 20 to 30 kt. Seas 7 to 10 ft.
.THU...E winds 15 to 25 kt. Seas 6 to 9 ft.
.THU NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft.
.FRI...SE winds 10 to 20 kt. Seas 7 to 9 ft.
.FRI NIGHT...SE winds 10 to 15 kt. Seas 7 to 9 ft.
.SAT...SE winds 10 to 15 kt. Seas 7 to 9 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 6 to 7 ft.



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