000
FZNT31 KNHC 010258
OFFN20

Marine Weather HF Voice Broadcast
NWS National Hurricane Center Miami, FL
1058 PM EDT Fri Jul 31 2020

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...Hurricane Isaias is moving through the Central
Bahamas tonight, centered near 23.3N 76.4W 987 mb at 0300 UTC
moving NW at 13 kt. Maximum sustained winds 70 kt gusts 85 kt.
Isaias will continue NW through the Central Bahamas overnight
then veer N-NW through the NW Bahamas and just offshore of S
Florida Sat move parallel to the central and north Florida coast
Sat night through Sun night and away from the region. Fresh to
strong flow will persist south of Hispaniola tonight, then
diminish on Sat. A low pressure trough will bring increased
winds and seas to the waters N of 15N and E of 60W late Sat
night and Sun. 

NW Caribbean W of 85W

.OVERNIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. 
.SUN...E winds less than 10 kt. Seas 3 to 4 ft. 
.SUN NIGHT...E winds less than 10 kt. Seas 3 ft in the evening,
subsiding to 2 ft or less. 
.MON...E winds less than 10 kt. Seas 2 ft or less, building to
3 ft in the afternoon. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.TUE...NE winds less than 10 kt. Seas 2 ft or less. 
.TUE NIGHT...E winds 10 kt. Seas 2 ft or less. 
.WED...E winds less than 10 kt. Seas 2 ft or less. 

Caribbean N of 15N between 72W and 85W

.OVERNIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...SE winds 10 to 20 kt. Seas 5 to 7 ft S of 18N, and 3 to
5 ft elsewhere. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.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...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft S of 18N, and
3 ft elsewhere. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft S of 18N, and 2 ft or
less elsewhere. 
.TUE NIGHT...E winds 10 to 20 kt. S of 18N, seas 3 to 5 ft.
Elsewhere, seas 2 ft or less, building to 3 ft after midnight. 
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft S of 18N, and 3 to
4 ft elsewhere. 

Caribbean from 11N to 15N W of 72W

.OVERNIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 5 ft. 
.TUE...E winds 10 to 20 kt. Seas 3 to 5 ft. 
.TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.WED...E winds 10 to 20 kt. Seas 4 to 6 ft. 

SW Caribbean S of 11N

.OVERNIGHT...N winds less than 10 kt. Seas 3 to 5 ft. 
.SAT...N winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 3 to 5 ft. 
.SAT NIGHT...N winds less than 10 kt. Seas 3 to 4 ft. 
.SUN...NE winds less than 10 kt, shifting to N in the afternoon.
Seas 3 to 4 ft. 
.SUN NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. 
.MON NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. 
.TUE...E winds less than 10 kt in the morning, becoming variable
winds less than 10 kt. Seas 3 to 4 ft. 
.TUE NIGHT...Variable winds less than 10 kt. Seas 3 ft. 
.WED...Variable winds less than 10 kt. Seas 3 ft. 

Caribbean between 64W and 72W

.OVERNIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to
25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft
elsewhere. 
.SAT...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela,
and 5 to 7 ft elsewhere. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela,
and 4 to 6 ft elsewhere. 
.SUN...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and
4 to 6 ft elsewhere. 
.SUN NIGHT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela,
and 4 to 6 ft elsewhere. 
.MON...Gulf of Venezuela, E winds 10 to 15 kt, shifting to S in
the afternoon,Seas 3 ft in the morning, subsiding to 2 ft or
less. Elsewhere, E winds 10 to 20 kt,Seas 4 to 6 ft. 
.MON NIGHT...E winds 10 to 20 kt. Seas 2 ft or less Gulf of
Venezuela, and 4 to 6 ft elsewhere. 
.TUE...NE winds less than 10 kt Gulf of Venezuela, and E 10 to
20 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 4 to
6 ft elsewhere. 
.TUE NIGHT...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. 
.WED...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela,
and 4 to 6 ft elsewhere. 

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

.OVERNIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...SE winds 20 to 30 kt. Seas 4 to 6 ft. 
.SUN NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...SE 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 3 to 5 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. 
.WED...E winds 10 to 15 kt. Seas 3 to 5 ft. 

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

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

Synopsis for the the SW N Atlantic including the Bahamas

.SYNOPSIS...Hurricane Isaias is moving through the Central 
Bahamas tonight, centered near 23.3N 76.4W 987 mb at 0300 UTC 
moving NW at 13 kt. Maximum sustained winds 70 kt gusts 85 kt.
Isaias will move through the NW Bahamas Sat morning, then begin
to veer N-NW and move near the SE coast of Florida, reaching
near 25.9N 79.1W Sat evening, then continue northward and just 
offshore of the east coast of Florida, reaching near 28.5N 80.5W 
Sun evening, then weaken to a tropical storm near 30.2N 80.5W Mon
morning. Isaias will then accelerate and exit the area Mon 
afternoon. Very large seas in SE swell are expected over a large 
portion of the SW North Atlantic waters near and offshore of the 
Bahamas tonight into Sat. Swell associated with Isaias will 
spread northward across the waters W of 75W Sat night through Sun
night, then move N of the region early next week. 

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

...TROPICAL STORM WARNING...

.OVERNIGHT...SE winds 10 to 20 kt, increasing to 20 to 30 kt
after midnight. Seas 7 to 10 ft. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 25 to
35 kt. Seas 8 to 11 ft. 
.SAT NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 30 to
40 kt, becoming SE 40 to 50 kt after midnight. Seas 8 to 13 ft. 
.SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 35 to
45 kt. Seas 10 to 15 ft. 
.SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 30 to
40 kt, increasing to 45 to 55 kt after midnight. Seas 11 to
16 ft. 
.MON...TROPICAL STORM CONDITIONS POSSIBLE. 
.MON NIGHT...S winds 15 to 25 kt. Seas 6 to 9 ft. 
.TUE...S winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE NIGHT...S winds 10 to 15 kt. Seas 4 to 5 ft. 
.WED...S winds 10 to 15 kt, diminishing to less than 10 kt in
the afternoon. Seas 3 to 4 ft. 

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

.OVERNIGHT...W of 70W, SE winds 10 to 20 kt, increasing to 20 to
30 kt after midnight. Elsewhere, SE winds 10 to 15 kt. Seas 7 to
10 ft W of 70W, and 5 to 7 ft elsewhere. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to 30 kt
W of 70W, and SE 10 to 15 kt elsewhere. Seas 7 to 10 ft W of
70W, and 5 to 6 ft elsewhere. 
.SAT NIGHT...SE winds 20 to 30 kt W of 70W, and SE 10 to 15 kt
elsewhere. Seas 6 to 9 ft W of 70W, and 5 ft elsewhere. 
.SUN...SE winds 15 to 25 kt W of 70W, and SE 10 to 15 kt
elsewhere. Seas 6 to 8 ft W of 70W, and 4 to 5 ft elsewhere. 
.SUN NIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 6 to 8 ft W of 70W, and 4 to 5 ft elsewhere. 
.MON...SE winds 15 to 25 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 5 to 7 ft. 
.MON NIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 15 kt
elsewhere. Seas 5 to 7 ft. 
.TUE...SE winds 10 to 20 kt. Seas 4 to 6 ft. 
.TUE NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. 
.WED...W of 70W, SE winds 10 to 15 kt, diminishing to less than
10 kt in the afternoon. Elsewhere, S winds 10 to 15 kt. Seas
4 to 5 ft. 

Bahamas N of 22N

...HURRICANE WARNING...

.OVERNIGHT...HURRICANE CONDITIONS. E winds 60 to 70 kt. Seas
8 to 11 ft. 
.SAT...HURRICANE CONDITIONS EXPECTED. SE winds 60 to 70 kt.
Seas 6 to 9 ft. 
.SAT NIGHT...HURRICANE CONDITIONS EXPECTED. SE winds 55 to
70 kt. Seas 5 to 7 ft. 
.SUN...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 35 to
45 kt, diminishing to 20 to 30 kt in the afternoon. Seas 4 to
6 ft. 
.SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON...SE winds 10 to 20 kt. Seas 3 to 5 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 3 ft. 
.WED...SE winds 10 to 15 kt. Seas 3 ft. 

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

.OVERNIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 20 to
30 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 9 to 14 ft W
of 70W, and 6 to 8 ft elsewhere. 
.SAT...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 20 to 30 kt
W of 70W, and E 10 to 20 kt elsewhere. Seas 7 to 10 ft W of 70W,
and 6 to 7 ft elsewhere. 
.SAT NIGHT...SE winds 15 to 25 kt W of 70W, and E 10 to 20 kt
elsewhere. Seas 5 to 7 ft. 
.SUN...SE winds 15 to 25 kt W of 70W, and E 10 to 20 kt
elsewhere. Seas 5 to 6 ft. 
.SUN NIGHT...E winds 15 to 20 kt. Seas 5 to 6 ft. 
.MON...E winds 10 to 20 kt. W of 70W, seas 5 to 6 ft. Elsewhere,
seas 5 to 6 ft, building to 6 to 9 ft in the afternoon. 
.MON NIGHT...E winds 10 to 20 kt. Seas 5 to 6 ft W of 70W, and
6 to 9 ft elsewhere. 
.TUE...SE winds 10 to 20 kt. Seas 6 to 8 ft. 
.TUE NIGHT...W of 70W, E winds less than 10 kt, shifting to SE
after midnight. Elsewhere, SE winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...SE winds 10 to 15 kt. Seas 4 to 5 ft. 

ATLC waters S of 22N W of 65W

.OVERNIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...E winds 10 to 20 kt. 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 4 to 6 ft. 
.MON NIGHT...SE winds 10 to 15 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 3 to 5 ft. 
.WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. 

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

.OVERNIGHT...E winds 15 to 20 kt. Seas 6 to 7 ft. 
.SAT...E winds 15 to 25 kt. Seas 6 to 7 ft. 
.SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 7 ft. 
.SUN...E winds 20 to 30 kt. Seas 6 to 9 ft. 
.SUN NIGHT...E winds 20 to 30 kt. Seas 6 to 9 ft. 
.MON...SE winds 15 to 25 kt. Seas 6 to 8 ft. 
.MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. 
.TUE...E winds 10 to 15 kt. Seas 4 to 5 ft. 
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. 
.WED...E winds 10 to 15 kt. Seas 4 to 5 ft.