640
FZNT34 KWBC 190303
OFFN32

Marine Weather HF Voice Broadcast
NWS Ocean Prediction Center Washington DC
1103 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. The eye of Hurricane
Erin is expected to move N into the outer S waters late Wed, then
continue N and NE through the outer S and central waters Wed
night and Thu before turning more NE and moving through the Outer
Mid-Atlantic Waters Thu night through Fri night. Tropical storm
conditions are expected over most of the area SE of a line from
the Virginia Capes to Georges Bank. 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. Another high will build over the
waters Fri through Sat 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 6 to 9 ft. Isolated showers
and tstms.
.TUE...E winds 15 to 25 kt. Seas 6 to 10 ft.
.TUE NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas 6 to 10 ft.
.WED...E winds 10 to 15 kt. Seas 8 to 13 ft.
.WED NIGHT...E winds 15 to 25 kt. Seas 11 to 19 ft.
.THU...NE winds 25 to 30 kt. Seas 14 to 26 ft.
.THU NIGHT...NE winds 25 to 30 kt, becoming N. Seas 14 to 26 ft.
.FRI...N to NE winds 20 to 30 kt. Seas 12 to 21 ft.
.FRI NIGHT...NE winds 15 to 25 kt, becoming N to NE 5 to 15 kt.
Seas 10 to 16 ft.
.SAT...NE winds 5 to 15 kt, becoming S to SE. Seas 7 to 12 ft.
.SAT NIGHT...S to SE winds 5 to 15 kt. Seas 5 to 9 ft.

Baltimore Canyon to the Hague Line south of 1000 fm

...HURRICANE CONDITIONS POSSIBLE THU NIGHT...

.TONIGHT...NE winds 15 to 25 kt. Seas 6 to 10 ft. Isolated
showers.
.TUE...E to NE winds 10 to 20 kt, becoming E 10 to 15 kt. Seas
6 to 10 ft.
.TUE NIGHT...E winds 5 to 15 kt. Seas 6 to 11 ft.
.WED...E winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 8 to
14 ft. Scattered showers and tstms.
.WED NIGHT...E winds 20 to 30 kt. Seas 14 to 23 ft.
.THU...E winds 30 to 40 kt, increasing to 45 to 55 kt. Seas
17 to 32 ft, building to 26 to 41 ft.
.THU NIGHT...E to NE winds 65 to 85 kt. Seas 27 to 42 ft.
.FRI...Hurricane conditions possible.
.FRI NIGHT...Tropical storm conditions possible.
.SAT...N winds 20 to 30 kt. Seas 13 to 22 ft.
.SAT NIGHT...N to NE winds 10 to 20 kt, becoming S to SE 5 to
10 kt. Seas 10 to 17 ft.

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

...HURRICANE CONDITIONS POSSIBLE THU...

.TONIGHT...E winds 15 to 25 kt. Seas 6 to 10 ft. Isolated
showers and tstms.
.TUE...E winds 15 to 25 kt. Seas 7 to 12 ft. Isolated showers
and tstms.
.TUE NIGHT...E winds 10 to 20 kt. Seas 8 to 14 ft. Isolated
showers and tstms.
.WED...E winds 10 to 20 kt, increasing to 20 to 30 kt. Seas
14 to 23 ft. Scattered showers and tstms.
.WED NIGHT...E winds 30 to 40 kt, increasing to 45 to 55 kt.
Seas 17 to 32 ft, building to 29 to 44 ft.
.THU...E to SE winds 80 to 100 kt, becoming S to SE 85 to
100 kt. Seas 38 to 53 ft.
.THU NIGHT...W to NW winds 75 to 95 kt, becoming NW 40 to 55 kt.
Seas 28 to 43 ft.
.FRI...N winds 20 to 30 kt. Seas 15 to 27 ft.
.FRI NIGHT...N to NE winds 15 to 25 kt. Seas 11 to 19 ft.
.SAT...N to NE winds 10 to 20 kt, becoming NE 5 to 15 kt. Seas
9 to 15 ft.
.SAT NIGHT...E to SE winds 5 to 10 kt, becoming S to SE 5 to
15 kt. Seas 7 to 12 ft.

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

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

.TONIGHT...E winds 5 to 15 kt. Seas 6 to 11 ft. Isolated
showers.
.TUE...E winds 10 to 20 kt. Seas 8 to 14 ft. Isolated showers
and tstms.
.TUE NIGHT...E winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 13 to 22 ft. Scattered showers and tstms.
.WED...E winds 30 to 40 kt, increasing to 45 to 55 kt. Seas
20 to 30 ft, building to 27 to 42 ft. Showers and tstms.
.WED NIGHT...E to SE winds 80 to 95 kt, becoming S to SE 90 to
105 kt. Seas 40 to 55 ft.
.THU...S to SW winds 90 to 105 kt, becoming W to SW 80 to
100 kt. Seas 39 to 54 ft.
.THU NIGHT...W winds 45 to 55 kt, becoming W to NW 25 to 35 kt.
Seas 20 to 35 ft, subsiding to 17 to 26 ft.
.FRI...N to NW winds 20 to 30 kt, becoming N 10 to 20 kt. Seas
12 to 21 ft.
.FRI NIGHT...N winds 10 to 20 kt, becoming N to NE 10 to 15 kt.
Seas 9 to 16 ft.
.SAT...E to NE winds 5 to 10 kt. Seas 8 to 14 ft.
.SAT NIGHT...E winds 5 to 10 kt, becoming SE. Seas 7 to 12 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 13 ft. Isolated
showers and tstms.
.TUE...E to NE winds 15 to 25 kt. Seas 9 to 16 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 20 to 30 ft. Scattered
showers and tstms.
.WED...E to NE winds 45 to 55 kt, increasing to 90 to 105 kt.
Seas 37 to 52 ft. Showers and tstms with vsby 1 nm or less.
.WED NIGHT...E to SE winds 95 to 110 kt, becoming S to SW 90 to
105 kt. Seas 39 to 54 ft.
.THU...W winds 50 to 60 kt, becoming W to NW 30 to 40 kt. Seas
22 to 37 ft, subsiding to 18 to 27 ft.
.THU NIGHT...N to NW winds 20 to 30 kt. Seas 13 to 22 ft.
.FRI...N winds 10 to 20 kt, becoming N to NE 5 to 15 kt. Seas
9 to 16 ft.
.FRI NIGHT...E to NE winds 5 to 15 kt, becoming 5 to 10 kt. Seas
8 to 14 ft.
.SAT...E winds 5 to 15 kt. Seas 8 to 12 ft.
.SAT NIGHT...E to SE winds 5 to 10 kt. Seas 6 to 11 ft.

.Forecaster Connelly. Ocean Prediction Center.