196
FZNT33 KWBC 200904
OFFN31

Marine Weather HF Voice Broadcast
NWS Ocean Prediction Center Washington DC
504 AM EDT Wed Aug 20 2025

New England continental shelf and slope waters from 25 nm
offshore to the Hague Line, except to 1000 fm south of New
England.

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 NEW ENGLAND WATERS...High pressure E of the region
will continue to gradually shift E of the area through tonight.
The center of Hurricane Erin is expected to pass NE through the
Outer Mid- Atlantic Waters Thu night into Fri, remaining S of the
waters. Tropical storm conditions are expected to cover nearly
all of the waters along and S of Georges Bank late Thu through
Fri. Erin will then move farther away from the area Fri night
into Sat. Long period S swell from Hurricane Erin will continue
through Thu night before backing to the SE and E Fri night. A
high pressure ridge will move E across the waters Fri night and
Sat, then shift E of the area Sat night into Sun. A cold front
will gradually approach the waters from the W late Sun night. For
more information on Hurricane Erin, please closely monitor the
latest forecasts from the National Hurricane Center.

Gulf of Maine to the Hague Line

.TODAY...Variable winds less than 5 kt, becoming E to SE, then,
becoming variable. Seas 4 to 7 ft.
.TONIGHT...E to SE winds less than 10 kt, increasing to 5 to
15 kt. Seas 4 to 7 ft.
.THU...E winds 10 to 20 kt. Seas 5 to 9 ft.
.THU NIGHT...NE winds 20 to 30 kt. Seas 9 to 15 ft.
.FRI...N to NE winds 20 to 30 kt. Seas 11 to 18 ft.
.FRI NIGHT...N winds 5 to 15 kt, becoming variable. Seas 9 to
15 ft.
.SAT...S winds less than 10 kt, increasing to 10 to 20 kt. Seas
6 to 11 ft.
.SAT NIGHT...S winds 15 to 20 kt. Seas 5 to 9 ft.
.SUN...S winds 15 to 20 kt. Seas 4 to 7 ft.
.SUN NIGHT...S winds 15 to 20 kt. Seas 4 to 6 ft.

Georges Bank...from the Northeast Channel to the Great South
Channel including waters east of Cape Cod...to the Hague Line

...TROPICAL STORM WARNING...

.TODAY...E winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
6 to 10 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 6 to 11 ft.
.THU...E winds 20 to 30 kt. Seas 10 to 17 ft. Chance of rain.
.THU NIGHT...NE winds 35 to 45 kt. Seas 14 to 27 ft. Rain.
.FRI...N to NE winds 35 to 45 kt. Seas 14 to 29 ft.
.FRI NIGHT...N winds 20 to 30 kt, diminishing to 5 to 15 kt.
Seas 14 to 23 ft.
.SAT...Variable winds less than 10 kt, becoming S. Seas 8 to
14 ft.
.SAT NIGHT...S winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 6 to 11 ft.
.SUN...S to SE winds 5 to 15 kt, increasing to 10 to 20 kt. Seas
5 to 9 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft.

South of New England...from the Great South Channel to Hudson
Canyon including the waters south of Marthas Vineyard and
Nantucket Island...out to 1000 fm

...TROPICAL STORM WARNING...

.TODAY...E winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
11 ft.
.TONIGHT...E winds 15 to 25 kt. Seas 8 to 14 ft. Chance of
showers.
.THU...E to NE winds 20 to 30 kt, becoming NE 25 to 35 kt. Seas
13 to 22 ft. Chance of rain.
.THU NIGHT...N to NE winds 30 to 40 kt. Seas 14 to 27 ft.
.FRI...N winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
14 to 26 ft.
.FRI NIGHT...N winds 10 to 20 kt, becoming SW 5 to 15 kt. Seas
11 to 18 ft.
.SAT...W to SW winds less than 10 kt, becoming S. Seas 7 to
12 ft.
.SAT NIGHT...S winds 10 to 15 kt. Seas 5 to 9 ft.
.SUN...S winds 10 to 15 kt. Seas 4 to 8 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 4 to 7 ft.

.Forecaster Connelly. Ocean Prediction Center.