511
FZUS51 KLWX 162035
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
435 PM EDT Fri May 16 2025

Tidal Potomac River and Maryland portion of Chesapeake Bay.

Forecasts of wave heights do not include effects of wind direction
relative to tidal currents. Expect higher waves when winds are
blowing against the tidal flow.  Waves flat where waters are iced over.

ANZ500-170800-
435 PM EDT Fri May 16 2025

.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...

A low pressure system will track across the Great Lakes through
Saturday. The associated cold front should cross the waters by
Saturday afternoon to evening. High pressure briefly returns before
a secondary cold front moves through early Monday morning. High
pressure settles to the north by early next week. Small Craft
Advisories may be needed for much of this weekend.

$$

ANZ535-170800-
Tidal Potomac from Key Bridge to Indian Head-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to
25 kt in the afternoon. Waves 1 ft. A chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening.
Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 30 kt. Waves 1 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 25 kt...diminishing
to 5 kt after midnight. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 kt. Waves less than 1 ft. A chance of showers in
the evening. Showers likely after midnight.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ536-170800-
Tidal Potomac from Indian Head to Cobb Island-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt early in the
evening. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or
less.
.SAT...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A
chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 kt. Waves less than 1 ft. A chance of showers in
the evening. Showers likely after midnight.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ537-170800-
Tidal Potomac from Cobb Island to Smith Point-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ530-170800-
Chesapeake Bay north of Pooles Island-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves flat. Scattered
showers and tstms.
.TONIGHT...SW winds around 5 kt. Waves 1 ft or less. Showers and
scattered tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt. Gusts up to 25 kt in the evening.
Waves 1 to 2 ft.
.MON...NW winds 10 to 15 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or
less. A chance of showers after midnight.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ531-170800-
Chesapeake Bay from Pooles Island to Sandy Point-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and scattered
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 15 to 20 kt. Gusts up to 25 kt in the evening.
Waves 2 ft.
.MON...NW winds 10 to 15 kt. Waves 1 to 2 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A
chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ538-170800-
Patapsco River including Baltimore Harbor-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves flat. Scattered
showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds around 5 kt. Waves 1 ft or less. Showers and
scattered tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.SAT NIGHT...W winds 10 kt with gusts to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or
less. A chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ539-170800-
Chester River to Queenstown MD-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves flat. Scattered
showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 kt. Waves less than 1 ft. Showers and numerous
tstms. Vsby 1 NM or less.
.SAT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or
less. A chance of showers after midnight.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ532-170800-
Chesapeake Bay from Sandy Point to North Beach-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.MON...NW winds 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt...becoming E after midnight. Waves 1 ft.
A chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ540-170800-
Eastern Bay-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or
less. A chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ533-170800-
Chesapeake Bay from North Beach to Drum Point-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Numerous showers with a
chance of tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers
through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ541-170800-
Choptank River to Cambridge MD and the Little Choptank River-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Numerous showers with a
chance of tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ542-170800-
Patuxent River to Broomes Island MD-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft. A chance
of showers and tstms.
.SAT NIGHT...W winds 10 to 15 kt...becoming NW 5 to 10 kt after
midnight. Gusts up to 20 kt. Waves 1 ft.
.SUN...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt...becoming E after midnight. Waves 1 ft.
A chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ534-170800-
Chesapeake Bay from Drum Point to Smith Point-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 2 ft.
.SUN...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON...NW winds 10 to 15 kt...becoming N after midnight. Waves 1 to
2 ft.
.TUE...NE winds 5 to 10 kt...becoming E after midnight. Waves 1 to
2 ft. A chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ543-170800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
435 PM EDT Fri May 16 2025

...SEVERE THUNDERSTORM WATCH 263 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.SAT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.SAT NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 1 ft.
.SUN...W winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON...NW winds 10 to 15 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A
chance of showers through the night.

Winds and waves higher and visibilities lower in and near tstms.

$$