656
FZNT34 KWBC 182118
OFFN32

Marine Weather HF Voice Broadcast
NWS Ocean Prediction Center Washington DC
518 PM EDT Mon Aug 18 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...Low pressure just E of the S
waters will lift slowly NE along a stationary front tonight while
a cold front moves S into the N waters. The cold front will
become stationary across the central waters tonight through Tue
night. High pressure will build S into the N waters behind the
front, then move NE away from the area Wed. Hurricane Erin will
be near 30.5N 73.7W at 2 PM EDT Wed, then move to 32.7N 73.0W by
2 AM EDT Thu, then to 34.8N 71.2W by 2 PM EDT Thu, then move NE
through Sat while moving away from the waters starting Fri.
Another high will build over the waters Fri through Sat night.
Long period SE to S swell from Erin, already affecting the
waters, will spread N into the central and N waters late tonight
through Tue night. Significant swell will continue through Fri
night while gradually backing to the E Wed through Thu night. 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

.TONIGHT...E winds 15 to 25 kt. Seas 5 to 9 ft. Isolated showers
and tstms.
.TUE...E winds 15 to 25 kt. Seas 5 to 9 ft.
.TUE NIGHT...E winds 10 to 20 kt, becoming 10 to 15 kt. Seas
6 to 10 ft.
.WED...E winds 10 to 15 kt, increasing to 15 to 20 kt. Seas 8 to
13 ft.
.WED NIGHT...E winds 15 to 20 kt, becoming NE 15 to 25 kt. Seas
13 to 21 ft.
.THU...NE winds 20 to 30 kt. Seas 14 to 24 ft.
.THU NIGHT...N to NE winds 20 to 30 kt. Seas 14 to 23 ft.
.FRI...N to NE winds 20 to 30 kt, becoming NE 10 to 20 kt. Seas
11 to 18 ft.
.FRI NIGHT...E to SE winds 5 to 10 kt, becoming S. Seas 7 to
12 ft.
.SAT...E winds 5 to 10 kt, becoming S to SE 10 to 15 kt. Seas
5 to 9 ft.
.SAT NIGHT...S winds 10 to 20 kt, becoming 10 to 15 kt. Seas
5 to 7 ft.

Baltimore Canyon to the Hague Line south of 1000 fm

...HURRICANE CONDITIONS POSSIBLE THU...

.TONIGHT...E to NE winds 15 to 25 kt. Seas 5 to 9 ft. Isolated
showers and tstms.
.TUE...E to NE winds 10 to 20 kt, becoming E 10 to 15 kt. Seas
6 to 10 ft. Scattered showers and tstms.
.TUE NIGHT...E winds 5 to 15 kt. Seas 6 to 11 ft. Scattered
showers and tstms.
.WED...E winds 10 to 20 kt. Seas 9 to 15 ft.
.WED NIGHT...E winds 20 to 30 kt. Seas 12 to 20 ft, building to
18 to 28 ft.
.THU...E to NE winds 35 to 45 kt, becoming E 50 to 65 kt. Seas
25 to 40 ft.
.THU NIGHT...E to NE winds 65 to 85 kt. Seas 26 to 41 ft.
.FRI...Hurricane conditions possible.
.FRI NIGHT...Tropical storm conditions possible.
.SAT...N to NE winds 10 to 20 kt, becoming E to NE 10 to 15 kt.
Seas 9 to 15 ft.
.SAT NIGHT...E to SE winds 10 to 15 kt, becoming S to SE. Seas
6 to 11 ft.

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

...HURRICANE CONDITIONS POSSIBLE THU...

.TONIGHT...E winds 5 to 15 kt, increasing to 15 to 25 kt. Seas
6 to 10 ft. Scattered tstms.
.TUE...E winds 15 to 25 kt. Seas 6 to 11 ft. Scattered showers
and tstms.
.TUE NIGHT...E winds 10 to 20 kt. Seas 9 to 15 ft. Scattered
showers and tstms.
.WED...E winds 20 to 30 kt. Seas 13 to 20 ft, building to 18 to
27 ft. Showers and tstms.
.WED NIGHT...E winds 30 to 40 kt, increasing to 45 to 60 kt.
Seas 32 to 47 ft.
.THU...E to SE winds 80 to 95 kt. Seas 34 to 49 ft.
.THU NIGHT...N to NW winds 70 to 85 kt, becoming NW 40 to 50 kt.
Seas 18 to 33 ft, subsiding to 16 to 25 ft.
.FRI...N winds 20 to 30 kt, diminishing to 10 to 20 kt. Seas
12 to 20 ft.
.FRI NIGHT...E to NE winds 5 to 15 kt. Seas 8 to 14 ft.
.SAT...NE winds 10 to 15 kt, becoming E 5 to 10 kt. Seas 7 to
12 ft.
.SAT NIGHT...E to SE winds 10 to 15 kt, becoming S to SE. Seas
6 to 10 ft.

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

...TROPICAL STORM WARNING...
...HURRICANE CONDITIONS POSSIBLE WED NIGHT...

.TONIGHT...NE winds 5 to 15 kt, becoming E. Seas 6 to 11 ft.
Isolated showers and tstms.
.TUE...E winds 10 to 20 kt. Seas 7 to 13 ft. Scattered showers
and tstms.
.TUE NIGHT...E winds 20 to 30 kt. Seas 14 to 24 ft. Scattered
showers and tstms.
.WED...E winds 30 to 40 kt, increasing to 45 to 60 kt. Seas
19 to 34 ft, building to 33 to 48 ft. Showers and tstms.
.WED NIGHT...E to SE winds 80 to 100 kt, becoming S to SE 85 to
100 kt. Seas 38 to 53 ft.
.THU...S to SW winds 80 to 95 kt, becoming W 75 to 90 kt. Seas
31 to 46 ft, subsiding to 18 to 33 ft.
.THU NIGHT...W winds 40 to 50 kt, becoming N to NW 20 to 30 kt.
Seas 14 to 24 ft.
.FRI...N to NE winds 10 to 20 kt. Seas 11 to 18 ft.
.FRI NIGHT...NE winds 10 to 15 kt, becoming E to NE 5 to 10 kt.
Seas 7 to 13 ft.
.SAT...NE winds 5 to 10 kt, becoming E. Seas 6 to 11 ft.
.SAT NIGHT...E winds 5 to 10 kt, becoming SE. Seas 5 to 9 ft.

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

...HURRICANE WARNING...

.TONIGHT...E to NE winds 5 to 15 kt. Seas 7 to 12 ft. Isolated
tstms.
.TUE...E to NE winds 15 to 25 kt. Seas 9 to 15 ft. Scattered
showers and tstms.
.TUE NIGHT...E to NE winds 20 to 30 kt, increasing to 30 to
40 kt. Seas 14 to 22 ft, building to 21 to 31 ft. Scattered
showers and tstms.
.WED...E to NE winds 50 to 60 kt, increasing to 80 to 95 kt.
Seas 35 to 50 ft. Showers and tstms.
.WED NIGHT...S to SE winds 85 to 100 kt, becoming W to SW 80 to
95 kt. Seas 36 to 51 ft, subsiding to 23 to 38 ft.
.THU...W winds 45 to 55 kt, becoming W to NW 30 to 40 kt. Seas
16 to 26 ft.
.THU NIGHT...N to NW winds 15 to 25 kt. Seas 11 to 19 ft.
.FRI...N to NE winds 5 to 15 kt, becoming E to NE. Seas 9 to
15 ft.
.FRI NIGHT...E to NE winds 10 to 15 kt, becoming E 5 to 10 kt.
Seas 7 to 12 ft.
.SAT...E winds 10 to 15 kt. Seas 6 to 10 ft.
.SAT NIGHT...E winds 10 to 15 kt, becoming SE. Seas 5 to 9 ft.

.Forecaster Holley. Ocean Prediction Center.