996
FZNT34 KWBC 210859
OFFN32

Marine Weather HF Voice Broadcast
NWS Ocean Prediction Center Washington DC
459 AM EDT Thu Aug 21 2025

West central North Atlantic continental shelf and slope waters
beyond 20 nm to 250 nm offshore, including south of Georges Bank
from 1000 fm to 250 nm offshore.

Conditions given represent the highest within that period.

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.

Locally higher winds and seas can be expected in and near tstms.

.SYNOPSIS FOR MID ATLC WATERS...The center of large Hurricane
Erin is located over the outer portion of the central waters
early this morning. Erin will continue to track N and NE through
the outer central and then outer portion of the northern waters
later today and tonight. Erin will then turn NE and move away
from the waters Fri and Fri night into the weekend. Significant S
to SE swell will continue through Fri night while gradually
backing to the E. A high pressure area will build over the waters
Fri night into Sat night while a stationary front forms over the
far S waters. Weak low pressure will form along the front off the
South Carolina coast Sat night, then lift NE and begin to
strengthen some while passing through the central and N waters
Sun into early Mon while the area of high pressure to the N
shifts E of the region. A cold front will approach the area from
the W late Sun night, then move E across the area Mon and Mon
night while the developing low passes N and NE of the area. For
more information on Hurricane Erin, please closely monitor the
latest forecasts from the National Hurricane Center.

Hudson Canyon to Baltimore Canyon including the waters west of
39.3N 71.9W...SW to 37.7N 72.9W

...TROPICAL STORM WARNING...

.TODAY...NE winds 20 to 30 kt, increasing to 30 to 35 kt. Seas
10 to 19 ft, building to 13 to 25 ft. Scattered showers and
tstms.
.TONIGHT...N to NE winds 30 to 35 kt, becoming N 25 to 30 kt.
Seas 15 to 25 ft. Chance of showers.
.FRI...N to NE winds 20 to 30 kt. Seas 11 to 20 ft.
.FRI NIGHT...E to NE winds 10 to 15 kt, becoming W to SW 5 to
15 kt. Seas 8 to 14 ft.
.SAT...N to NE winds less than 10 kt, becoming S to SE 10 to
20 kt. Seas 5 to 9 ft.
.SAT NIGHT...S to SE winds 10 to 20 kt, becoming S 5 to 15 kt.
Seas 4 to 8 ft.
.SUN...S winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 4 to
6 ft.
.SUN NIGHT...S winds 5 to 15 kt. Seas 3 to 6 ft.
.MON...Variable winds less than 10 kt, becoming W to SW. Seas
3 to 5 ft.
.MON NIGHT...W to SW winds 10 to 20 kt. Seas 3 to 5 ft.

Baltimore Canyon to the Hague Line south of 1000 fm

...HURRICANE WARNING...

.TODAY...E winds 30 to 40 kt, becoming E to NE 70 to 85 kt. Seas
11 to 21 ft, building to 23 to 43 ft. Showers and tstms.
.TONIGHT...E to NE winds 65 to 85 kt. Seas 31 to 49 ft. Showers
and tstms with vsby 1 nm or less.
.FRI...N winds 55 to 70 kt, diminishing to 35 to 45 kt. Seas
27 to 42 ft. Tstms and scattered showers.
.FRI NIGHT...N to NW winds 25 to 35 kt, becoming N to NE 15 to
25 kt. Seas 16 to 31 ft.
.SAT...NE winds 10 to 20 kt, becoming E 5 to 15 kt. Seas 8 to
15 ft.
.SAT NIGHT...E to SE winds 5 to 15 kt, becoming S to SE. Seas
6 to 11 ft.
.SUN...S to SE winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
6 to 9 ft.
.SUN NIGHT...S winds 15 to 25 kt. Seas 4 to 8 ft.
.MON...S to SW winds 20 to 30 kt. Seas 4 to 8 ft.
.MON NIGHT...W to SW winds 15 to 25 kt. Seas 4 to 8 ft.

Baltimore Canyon to Hatteras Canyon out to 36N 70W to 34N 71W

...HURRICANE WARNING...

.TODAY...E to SE winds 75 to 90 kt, becoming S to SE, then,
becoming W to NW 70 to 85 kt. Seas 32 to 55 ft. Showers and
tstms.
.TONIGHT...NW winds 45 to 60 kt, becoming N to NW 25 to 35 kt.
Seas 26 to 41 ft, subsiding to 16 to 32 ft. Scattered tstms and
chance of showers.
.FRI...N winds 20 to 30 kt. Seas 13 to 24 ft. Chance of showers
and tstms.
.FRI NIGHT...N to NE winds 10 to 20 kt, becoming E to NE 5 to
15 kt. Seas 9 to 17 ft.
.SAT...E to NE winds 5 to 15 kt. Seas 7 to 12 ft.
.SAT NIGHT...SE winds 5 to 15 kt. Seas 6 to 10 ft.
.SUN...S to SE winds 5 to 15 kt. Seas 4 to 8 ft.
.SUN NIGHT...SE winds 15 to 25 kt, becoming S. Seas 4 to 8 ft.
.MON...W to SW winds 10 to 20 kt. Seas 4 to 8 ft.
.MON NIGHT...W to SW winds 10 to 20 kt, becoming W to NW. Seas
4 to 7 ft.

Hatteras Canyon to Cape Fear out to 34N 71W to 32N 73W

...HURRICANE WARNING...

.TODAY...S to SW winds 75 to 90 kt, becoming W to SW 70 to
85 kt, then, becoming W 40 to 50 kt. Seas 34 to 55 ft, subsiding
to 24 to 42 ft. Showers and tstms.
.TONIGHT...W to NW winds 25 to 35 kt, becoming N to NW 20 to
30 kt. Seas 14 to 28 ft. Chance of showers and tstms.
.FRI...N to NW winds 10 to 20 kt. Seas 10 to 19 ft. Chance of
showers and tstms.
.FRI NIGHT...N to NE winds 10 to 15 kt, becoming E to NE 5 to
10 kt. Seas 8 to 14 ft. Chance of showers and tstms.
.SAT...E winds 5 to 15 kt. Seas 6 to 11 ft.
.SAT NIGHT...E winds 5 to 15 kt, becoming SE. Seas 5 to 9 ft.
.SUN...SE winds 10 to 20 kt. Seas 4 to 8 ft.
.SUN NIGHT...S winds 10 to 20 kt, becoming SW. Seas 5 to 8 ft.
.MON...W to NW winds 10 to 20 kt, becoming W to SW. Seas 4 to
8 ft.
.MON NIGHT...W winds 10 to 20 kt. Seas 5 to 8 ft.

Cape Fear to 31N out to 32N 73W to 31N 74W

...HURRICANE WARNING...

.TODAY...W winds 40 to 50 kt, becoming W to NW 20 to 30 kt. Seas
22 to 40 ft, subsiding to 13 to 23 ft. Showers and tstms.
.TONIGHT...W to NW winds 20 to 30 kt, becoming N to NW 10 to
20 kt. Seas 10 to 19 ft. Scattered showers and isolated tstms.
.FRI...N to NE winds 5 to 15 kt, becoming E to NE. Seas 8 to
14 ft. Scattered showers and tstms.
.FRI NIGHT...E to NE winds 5 to 15 kt. Seas 7 to 12 ft.
Scattered showers and tstms.
.SAT...E winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 5 to
9 ft.
.SAT NIGHT...E to SE winds 10 to 20 kt. Seas 5 to 9 ft.
.SUN...S to SE winds 10 to 20 kt, becoming W to SW. Seas 4 to
8 ft.
.SUN NIGHT...W to SW winds 15 to 25 kt. Seas 4 to 8 ft.
.MON...W to NW winds 10 to 20 kt, becoming W to SW. Seas 5 to
8 ft.
.MON NIGHT...W to SW winds 10 to 20 kt, becoming W to NW. Seas
4 to 8 ft.

.Forecaster Mills. Ocean Prediction Center.