000
FZNT31 KNHC 171630
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1230 PM EDT Thu Aug 17 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 strong and broad tropical wave from E Hispaniola
to NW Venezuela will move across the central Caribbean through
Sat, and the western Caribbean through Sun. Low pres in the
tropical Atlantic east of 55W will move into the eastern
Caribbean midday Fri, as a possible tropical cyclone. This
developing low will move through the central Caribbean through
Sun, then continue through the NW Caribbean by late Mon,
accompanied by strong winds and building seas. 

NW Caribbean W of 85W

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 ft. 
.TONIGHT...E winds 10 to 20 kt. Seas 3 ft. 
.FRI...E winds 10 to 15 kt. Seas 3 ft. 
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.SAT...NE winds 10 to 15 kt. Seas 3 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 ft. 
.SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 ft. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building
to 3 ft after midnight. 
.MON...NE winds 10 to 20 kt, increasing to 25 to 35 kt in the
afternoon. Seas 4 to 6 ft. 

Caribbean N of 15N between 72W and 85W

.THIS AFTERNOON...NE winds 10 to 20 kt S of 18N, and E 15 to
25 kt elsewhere. Seas 3 to 5 ft. 
.TONIGHT...NE winds 10 to 20 kt S of 18N, and NE 15 to 25 kt
elsewhere. Seas 3 to 5 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.SAT...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft or
less elsewhere. 
.SAT NIGHT...S of 18N, NE winds 20 to 30 kt, increasing to 30 to
40 kt after midnight,Seas 4 to 6 ft, building to 6 to 9 ft after
midnight. Elsewhere, NE winds 15 to 25 kt,Seas 3 to 4 ft. 
.SUN...S of 18N, NE winds 35 to 45 kt, increasing to 45 to 55 kt
in the afternoon. Elsewhere, E winds 15 to 25 kt. Seas 6 to 9 ft
S of 18N, and 3 to 5 ft elsewhere. 
.SUN NIGHT...E winds 50 to 65 kt S of 18N, and E 20 to 30 kt
elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. 
.MON...E winds 55 to 65 kt S of 18N, and E 20 to 30 kt
elsewhere. Seas 6 to 9 ft. 

Caribbean from 11N to 15N W of 72W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TONIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.FRI NIGHT...NE winds 10 to 20 kt. Seas 4 to 5 ft. 
.SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...Within 90 nm of coast of Colombia, W winds less
than 10 kt, shifting to SW after midnight. Elsewhere, NE winds
20 to 30 kt, increasing to 40 to 50 kt after midnight. Seas 4 to
6 ft. 
.SUN...Within 90 nm of coast of Colombia, S winds 10 to 20 kt.
Elsewhere, NE winds 45 to 55 kt, shifting to SW 50 to 60 kt in
the afternoon. Seas 5 to 7 ft. 
.SUN NIGHT...Within 90 nm of coast of Colombia, E winds 10 to
15 kt, diminishing to less than 10 kt after midnight. Elsewhere,
SW winds 50 to 60 kt. Seas 5 to 7 ft. 
.MON...Within 90 nm of coast of Colombia, E winds 10 kt.
Elsewhere, S winds 50 to 60 kt, becoming SE 40 to 50 kt in the
afternoon. Seas 4 to 6 ft. 

SW Caribbean S of 11N

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

Caribbean between 64W and 72W

...TROPICAL STORM WARNING...

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere. 
.TONIGHT...E winds 10 to 20 kt. Seas 4 to 5 ft. 
.FRI...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and
4 to 6 ft elsewhere. 
.FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. Gulf of 
Venezuela, NE winds 10 to 15 kt,Seas 3 ft in the evening, 
subsiding to 2 ft or less. Elsewhere, NE winds 20 to 30 kt, 
increasing to 30 to 40 kt after midnight,Seas 6 to 8 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. Gulf of Venezuela, 
Variable winds less than 10 kt. Elsewhere, E winds 30 to 40 kt, 
increasing to 40 to 50 kt in the afternoon. Seas 2 ft or less 
Gulf of Venezuela, and 7 to 10 ft elsewhere.
.SAT NIGHT...Variable winds less than 10 kt Gulf of Venezuela,
and E 40 to 50 kt elsewhere. Seas 3 ft Gulf of Venezuela, and
7 to 10 ft elsewhere. 
.SUN...Gulf of Venezuela, Variable winds less than 10 kt,Seas
3 ft in the morning, subsiding to 2 ft or less. Elsewhere, E
winds 20 to 30 kt, diminishing to 10 to 20 kt in the
afternoon,Seas 5 to 7 ft. 
.SUN NIGHT...NE winds less than 10 kt Gulf of Venezuela, and E
10 to 15 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and
3 to 5 ft elsewhere. 
.MON...E winds less than 10 kt Gulf of Venezuela, and E 10 to
15 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 15 to 25 kt. Seas 5 to 7 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. 
.FRI...E winds 20 to 30 kt. Seas 7 to 10 ft. 
.FRI NIGHT...E winds 20 to 30 kt. Seas 6 to 9 ft. 
.SAT...E winds 15 to 25 kt. Seas 6 to 8 ft. 
.SAT NIGHT...E winds 15 to 25 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 4 to 6 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

...TROPICAL STORM WARNING...

.THIS AFTERNOON...E winds 15 to 25 kt. Seas 4 to 6 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.FRI...TROPICAL STORM CONDITIONS EXPECTED. SE winds 25 to 35 kt.
Seas 5 to 7 ft. 
.FRI NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to 
40 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 15 kt. Seas 4 to 6 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. 

SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS

.SYNOPSIS...The northern part of tropical wave in E Hispaniola
will move W to the Windward Passage by early Fri, then W of the 
region through Sat, accompanied by fresh to locally strong winds
and seas to 8 ft S of 22N. Low pressure in the tropical Atlc
will pass N of the Leeward Islands late Sat, possibly as a 
tropical cyclone, and reach the southern Bahamas by early Mon 
bringing strong winds and building seas to the waters S of 25N. A
ridge along 28N will move N of the area early next week.

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

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

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

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. 
.TONIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI...S winds 10 to 15 kt. Seas 3 to 4 ft. 
.FRI NIGHT...S winds 10 to 15 kt. Seas 4 ft. 
.SAT...S winds 10 to 15 kt W of 70W, and S less than 10 kt
elsewhere. Seas 4 ft. 
.SAT NIGHT...SE winds 10 to 15 kt W of 70W, and SE less than
10 kt elsewhere. Seas 3 to 4 ft. 
.SUN...SE winds 10 to 15 kt W of 70W, and SE less than 10 kt
elsewhere. Seas 3 to 4 ft. 
.SUN NIGHT...SE winds 10 to 15 kt. Seas 4 to 5 ft. 
.MON...W of 70W, SE winds 10 to 15 kt. Elsewhere, NE winds 10 to
15 kt, diminishing to less than 10 kt in the afternoon. Seas
4 to 5 ft. 

Bahamas N of 22N

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

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

.THIS AFTERNOON...E 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 15 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 W of 70W, and E 15 to 25 kt
elsewhere. Seas 6 to 8 ft. 
.SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. 
.MON...E winds 15 to 25 kt. Seas 6 to 9 ft. 

ATLC waters S of 22N W of 65W

.THIS AFTERNOON...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.TONIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.FRI NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. 
.SUN...E winds 15 to 25 kt. Seas 6 to 9 ft. 
.SUN NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. 
.MON...E winds 15 to 25 kt. Seas 6 to 9 ft. 

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

.THIS AFTERNOON...E winds 15 to 20 kt. Seas 6 to 7 ft. 
.TONIGHT...E winds 15 to 20 kt. Seas 6 to 7 ft. 
.FRI...E winds 15 to 20 kt. Seas 6 to 7 ft. 
.FRI NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. 
.SAT...E winds 20 to 30 kt. Seas 8 to 11 ft. 
.SAT NIGHT...E winds 15 to 25 kt. Seas 7 to 10 ft. 
.SUN...E winds 15 to 25 kt. Seas 7 to 10 ft. 
.SUN NIGHT...E winds 15 to 25 kt. Seas 7 to 9 ft. 
.MON...E winds 15 to 25 kt. Seas 7 to 9 ft.