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NDBC is adding additional data to its .drift file format on or about August 17. For more info, see the Drift File Format Change Notice.

National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 131732
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
132 PM EDT Sat Aug 13 2022

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. 

ANZ500-140800-
132 PM EDT Sat Aug 13 2022

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

Canadian high pressure will build over the waters through tonight
before moving offshore Sunday. Low pressure may impact the waters
early next week before the system lifts away from the Mid-Atlantic
coast by Wednesday. A Small Craft Advisory may be needed on Tuesday
night into Wednesday.



ANZ535-140800-
Tidal Potomac from Key Bridge to Indian Head-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 5 kt. Waves less than 1 ft.

TONIGHT
S winds around 5 kt. Waves 1 ft.

SUN
S winds around 5 kt. Waves 1 ft.

SUN NIGHT
SE winds around 5 kt. Waves 1 ft. A chance of showers.

MON
SE winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.

MON NIGHT
E winds 5 kt. Waves less than 1 ft. A chance of
showers.

TUE
NE winds 5 kt. Waves less than 1 ft. Showers likely. A chance
of tstms through the night, then a chance of showers after midnight.

WED
N winds around 5 kt. Waves 1 ft or less. A chance of showers
through the night. 

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



ANZ536-140800-
Tidal Potomac from Indian Head to Cobb Island-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 5 kt. Waves less than 1 ft.

TONIGHT
S winds around 5 kt. Waves 1 ft.

SUN
S winds around 5 kt. Waves 1 ft.

SUN NIGHT
SE winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

MON NIGHT
E winds 5 kt. Waves less than 1 ft. Showers likely.

TUE
NE winds 5 kt. Waves less than 1 ft. Showers likely. A chance
of tstms through the night, then a chance of showers after midnight.

WED
N winds around 5 kt. Waves 1 ft or less. A chance of showers
in the evening. 

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



ANZ537-140800-
Tidal Potomac from Cobb Island to Smith Point-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms, then a chance of showers after midnight.

WED
N 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.



ANZ530-140800-
Chesapeake Bay north of Pooles Island-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 5 to 10 kt. Waves 1 ft.

TONIGHT
W winds around 5 kt. Waves 1 ft or less.

SUN
S winds around 5 kt. Waves 1 ft or less.

SUN NIGHT
S winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. A chance of showers.

MON NIGHT
E winds 5 kt. Waves less than 1 ft. A chance of
showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

WED
N winds around 5 kt. Waves 1 ft or less. A chance of showers
through the night. 



ANZ531-140800-
Chesapeake Bay from Pooles Island to Sandy Point-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 5 to 10 kt. Waves 1 ft.

TONIGHT
S winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
S winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms in the evening.

WED
N 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.



ANZ538-140800-
Patapsco River including Baltimore Harbor-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
NE winds 5 to 10 kt. Waves 1 ft.

TONIGHT
SW winds 5 kt. Waves flat.

SUN
SW winds 5 kt. Waves less than 1 ft.

SUN NIGHT
S winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of
tstms through the night.

WED
N winds around 5 kt. Waves 1 ft or less. A chance of showers
through the night. 

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



ANZ539-140800-
Chester River to Queenstown MD-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 5 to 10 kt. Waves 1 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
S winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of
tstms through the night.

WED
N winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. 

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



ANZ532-140800-
Chesapeake Bay from Sandy Point to North Beach-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 ft.

TONIGHT
S winds 5 kt. Waves less than 1 ft.

SUN
SW winds 5 kt. Waves less than 1 ft.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON
SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms through the
night. A chance of showers after midnight.

WED
N 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.



ANZ540-140800-
Eastern Bay-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
S winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms through the
night. A chance of showers after midnight.

WED
N winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. 

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



ANZ533-140800-
Chesapeake Bay from North Beach to Drum Point-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 to 2 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON NIGHT
E winds 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely through the
day. A chance of tstms through the night. A chance of showers
through the night.

WED
N 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.



ANZ541-140800-
Choptank River to Cambridge MD and the Little Choptank River-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms through the
night. A chance of showers after midnight.

WED
N 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.



ANZ542-140800-
Patuxent River to Broomes Island MD-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 ft.

TONIGHT
SE winds 5 kt. Waves less than 1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
SE winds 5 kt. Waves less than 1 ft. A chance of
showers.

MON
SE winds 5 kt. Waves less than 1 ft. A chance of showers.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of
tstms through the night, then a chance of showers after midnight.

WED
N 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.



ANZ534-140800-
Chesapeake Bay from Drum Point to Smith Point-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
N winds 10 kt. Waves 1 to 2 ft.

TONIGHT
NE winds 5 to 10 kt...becoming S after midnight. Waves
1 ft.

SUN
S winds 5 kt. Waves less than 1 ft.

SUN NIGHT
SE winds 5 to 10 kt. Waves 1 ft.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON NIGHT
E winds 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely with a
chance of tstms, then a chance of showers after midnight.

WED
N 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.



ANZ543-140800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
132 PM EDT Sat Aug 13 2022

THIS AFTERNOON
NW winds 10 kt. Waves 1 ft.

TONIGHT
N winds 5 to 10 kt...becoming SE in the late evening and
overnight. Waves 1 ft or less.

SUN
S winds 5 kt. Waves flat.

SUN NIGHT
SE winds 5 to 10 kt. Waves 1 ft.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.

MON NIGHT
E winds 5 to 10 kt. Waves 1 ft. A chance of showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms, then a chance of showers after midnight.

WED
N winds 5 to 10 kt. Waves 1 ft. 

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