Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 252005
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EDT Sat May 25 2024

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM

ANZ200-260900-
404 PM EDT Sat May 25 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres moves offshore tonight. A weak warm front will lie across
southern New Eng and the waters Sun. Increasing S winds Mon and Mon
night ahead of a slow moving cold front which moves into the waters
Tue. A series of weak frontal systems will follow for the mid to
late week period.

$$

ANZ250-260900-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening.
Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and N 1 foot
at 4 seconds. A slight chance of showers after midnight.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 1 foot at 9 seconds. A chance of showers in
the morning.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of
showers after midnight.
.MON...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and SE 1 foot at
9 seconds. A chance of showers.
.MON NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 ft. Wave Detail: E 4 ft at 6 seconds and SE 1 foot at
9 seconds. A chance of showers in the evening, then showers with
a chance of tstms after midnight.
.TUE...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. Wave Detail: SE 4 ft at 7 seconds. Showers, mainly in the
morning.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft.
.WED...S winds around 10 kt. Seas 2 to 4 ft.
.WED NIGHT THROUGH THU NIGHT...NW winds around 10 kt. Seas 2 to
4 ft. A chance of showers.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ251-260900-
Massachusetts Bay and Ipswich Bay-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and
NE 1 foot at 4 seconds. A chance of showers after midnight.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE
1 foot at 3 seconds and E 1 foot at 9 seconds. A chance of
showers in the morning.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less, then
around 2 ft after midnight. Wave Detail: SE 1 foot at 4 seconds
and SE 1 foot at 9 seconds, becoming E 1 foot at 4 seconds and SE
1 foot at 9 seconds. A chance of showers after midnight.
.MON...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 4 seconds and SE 1 foot at 9 seconds. A chance of showers.
.MON NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
9 seconds. Showers likely in the evening, then showers with a
chance of tstms after midnight.
.TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 3 ft at 6 seconds and SE 3 ft at 9 seconds.
Showers, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft.
.WED...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.WED NIGHT THROUGH THU NIGHT...NW winds around 10 kt. Seas 2 to
3 ft. A chance of showers.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ231-260900-
Cape Cod Bay-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
S 1 foot at 2 seconds and N 1 foot at 4 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 3 seconds and E 1 foot at 4 seconds.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 3 seconds and E 1 foot at 6 seconds. A
chance of showers after midnight.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: E 1 foot at 3 seconds and SE
1 foot at 9 seconds. A chance of showers in the afternoon.
.MON NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas
2 to 4 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at
8 seconds. A chance of showers in the evening, then showers with
a chance of tstms after midnight.
.TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
4 ft. Wave Detail: SE 3 ft at 7 seconds and SW 2 ft at 4 seconds.
Showers, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
.WED THROUGH THU NIGHT...NW winds 5 to 10 kt. Seas around 2 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ254-260900-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and N 1 foot at 4 seconds.
.SUN...S winds around 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 5 seconds and NE 1 foot at 4 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of
showers after midnight.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 4 seconds and SE 1 foot at 9 seconds.
.MON NIGHT AND TUE...S winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft. Wave Detail: S 5 ft at 7 seconds and NE 2 ft at
6 seconds. A chance of showers in the evening, then showers
through the day. A chance of showers in the afternoon.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 6 ft. Wave Detail: E 5 ft at 7 seconds and SW
1 foot at 3 seconds.
.WED THROUGH THU NIGHT...NW winds around 10 kt. Seas 3 to 5 ft.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ255-260900-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and SE 1 foot at 9 seconds. Patchy dense fog
after midnight with vsby 1 NM or less.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft
at 5 seconds and SE 1 foot at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 4 seconds and SW 1 foot at 3 seconds.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 4 seconds and SE 1 foot at 9 seconds.
.MON NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft, building to 4 to 5 ft after midnight. Wave Detail: SE
4 ft at 5 seconds and SE 1 foot at 8 seconds, becoming S 5 ft at
5 seconds and SE 1 foot at 8 seconds. A chance of showers in the
evening, then showers with a chance of tstms after midnight.
.TUE...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to
6 ft. Wave Detail: S 5 ft at 7 seconds and NE 1 foot at
6 seconds. Showers likely, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 6 ft.
.WED THROUGH THU...W winds 10 to 15 kt. Seas 3 to 5 ft.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ256-260900-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and SE 1 foot at 9 seconds. Patchy dense fog
after midnight with vsby 1 NM or less.
.SUN...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 1 foot at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SW 1 foot at 4 seconds and SE 1 foot at 4 seconds.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers
in the afternoon.
.MON NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SE
4 ft at 5 seconds and SE 1 foot at 8 seconds, becoming SE 5 ft at
7 seconds. Showers likely in the evening, then showers with a
chance of tstms after midnight.
.TUE...S winds 15 to 20 kt, becoming SW 10 to 15 kt in the
afternoon. Seas 5 to 6 ft. Wave Detail: S 5 ft at 6 seconds.
Showers likely with a chance of tstms in the morning.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 5 ft.
.WED THROUGH THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ232-260900-
Nantucket Sound-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail:
NE 1 foot at 3 seconds and S 1 foot at 3 seconds.
.SUN...S winds around 10 kt. Seas around 2 ft in the morning,
then 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW
1 foot at 3 seconds, becoming SW 1 foot at 3 seconds and SE
1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or
less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds. A
chance of showers after midnight.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SE 1 foot at 4 seconds and SE
1 foot at 9 seconds, becoming E 2 ft at 4 seconds and SE 1 foot
at 9 seconds. A chance of showers in the afternoon.
.MON NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
8 seconds. A chance of showers in the evening, then showers with
a chance of tstms after midnight.
.TUE...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 6 seconds and SW 1 foot at
4 seconds. Showers, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 3 ft.
.WED THROUGH THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ233-260900-
Vineyard Sound-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
S 1 foot at 5 seconds and SE 1 foot at 9 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S
1 foot at 5 seconds and SE 1 foot at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 4 seconds and SE 1 foot at 9 seconds. A
chance of showers after midnight.
.MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Seas 1 foot or less, then around
2 ft in the afternoon. Wave Detail: SE 1 foot at 3 seconds and SW
1 foot at 3 seconds, becoming SE 1 foot at 3 seconds and S 1 foot
at 8 seconds. A chance of showers in the afternoon.
.MON NIGHT AND TUE...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and S 3 ft at
4 seconds. Showers likely in the evening, then showers with a
chance of tstms through the day. A chance of showers in the
afternoon.
.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave
Detail: S 4 ft at 8 seconds and SW 2 ft at 4 seconds.
.WED THROUGH THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ234-260900-
Buzzards Bay-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail:
NE 1 foot at 3 seconds and SW 1 foot at 3 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 3 seconds and SE 1 foot at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave
Detail: SW 1 foot at 4 seconds and SE 1 foot at 9 seconds. A
chance of showers after midnight.
.MON...E winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft
in the afternoon. Wave Detail: SE 1 foot at 3 seconds and SE
1 foot at 9 seconds, becoming E 1 foot at 4 seconds and S 1 foot
at 8 seconds. A chance of showers in the afternoon.
.MON NIGHT AND TUE...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and S 3 ft at
4 seconds. Showers likely in the evening, then showers with a
chance of tstms through the day. A chance of showers in the
afternoon.
.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave
Detail: S 3 ft at 8 seconds and SW 2 ft at 4 seconds.
.WED THROUGH THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ235-260900-
Rhode Island Sound-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and SE 1 foot at 9 seconds.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 5 seconds and SE 1 foot at 9 seconds. Patchy fog in the
morning with vsby 1 NM or less.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds. A
chance of showers after midnight.
.MON...E winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft
at 4 seconds and SE 1 foot at 9 seconds. Showers likely in the
afternoon.
.MON NIGHT AND TUE...SW winds 15 to 20 kt with gusts up to 25 kt.
Seas 3 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. Showers likely
in the evening, then showers with a chance of tstms through the
day.
.TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: S 5 ft at 8 seconds and SW
1 foot at 4 seconds.
.WED THROUGH THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ237-260900-
Block Island Sound-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 6 seconds and SE 1 foot at 9 seconds. A slight chance of
showers after midnight.
.SUN...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW
1 foot at 5 seconds and SE 1 foot at 9 seconds.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds. A
chance of showers.
.MON...E winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up
to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft
at 4 seconds and SE 1 foot at 9 seconds. Showers likely in the
afternoon.
.MON NIGHT AND TUE...SW winds 10 to 15 kt with gusts up to 20 kt.
Seas 3 to 5 ft. Wave Detail: SE 4 ft at 4 seconds and S 4 ft at
7 seconds. Showers with a chance of tstms.
.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave
Detail: S 4 ft at 8 seconds and SW 1 foot at 4 seconds.
.WED...SW winds 5 to 10 kt. Seas 3 to 4 ft.
.WED NIGHT...W winds around 10 kt. Seas 2 to 3 ft. A chance of
showers.
.THU AND THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ230-260900-
Boston Harbor-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers after midnight.
.SUN...S winds 5 to 10 kt. Waves 1 foot or less. A chance of
showers.
.SUN NIGHT...SE winds 5 to 10 kt, becoming E after midnight.
Waves 1 foot or less. A chance of showers.
.MON...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. Waves 1 foot or less, then around
2 ft in the afternoon. A chance of showers in the morning, then
showers likely in the afternoon.
.MON NIGHT...SE winds around 15 kt with gusts up to 20 kt. Waves
2 to 3 ft. Showers. A chance of tstms after midnight.
.TUE...S winds 10 to 15 kt with gusts up to 20 kt. Waves around
2 ft. Showers, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Waves around 2 ft in the evening, then 1 foot or
less.
.WED THROUGH THU NIGHT...NW winds 5 to 10 kt. Waves around 2 ft.
A chance of showers.

Winds and waves higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

ANZ236-260900-
Narragansett Bay-
404 PM EDT Sat May 25 2024

.TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less.
.SUN...S winds around 5 kt, increasing to around 10 kt in the
afternoon. Waves 1 foot or less.
.SUN NIGHT...S winds 5 to 10 kt, becoming SE after midnight.
Waves 1 foot or less. A chance of showers after midnight.
.MON...E winds 5 to 10 kt, becoming SE 10 to 15 kt in the
afternoon. Waves 1 foot or less, then around 2 ft in the
afternoon. A chance of showers in the morning, then showers
likely in the afternoon.
.MON NIGHT AND TUE...SW winds 10 to 15 kt with gusts up to 20 kt.
Waves 2 to 4 ft. Showers with a chance of tstms.
.TUE NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Waves 2 to 4 ft.
.WED...SW winds 10 to 15 kt. Waves 2 to 3 ft.
.WED NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance of
showers.
.THU AND THU NIGHT...NW winds 5 to 10 kt. Waves 2 to 3 ft.

Winds and waves higher in and near tstms.

Seas are reported as significant wave height, which is the
average of the highest third of the waves. Individual wave
heights may be more than twice the significant wave height.

$$

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