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National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 130305
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1105 PM EDT Mon Apr 12 2021

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. 

ANZ500-130815-
1105 PM EDT Mon Apr 12 2021

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

A cold front will stall to the south and west of the waters
overnight into Tuesday. High pressure briefly returns for later
Tuesday into Wednesday. Another area of low pressure may impact the
region towards the latter portion of the week. Small Craft
Advisories may be needed for portions of the waters Thursday and
Friday.



ANZ535-130815-
Tidal Potomac from Key Bridge to Indian Head-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 5 kt. Waves less than 1 ft. Scattered
showers.

TUE
N winds 5 kt. Waves less than 1 ft.

TUE NIGHT
S winds around 5 kt. Waves 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

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

THU
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of rain.

THU NIGHT
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of rain.

FRI
NW winds 5 to 10 kt. Waves 1 ft.

SAT
W winds 5 kt. Waves less than 1 ft. 



ANZ536-130815-
Tidal Potomac from Indian Head to Cobb Island-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 5 kt. Waves less than 1 ft. Scattered
showers.

TUE
N winds 5 kt. Waves less than 1 ft.

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

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

THU
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of rain.

THU NIGHT
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of rain.

FRI
NW winds 5 to 10 kt. Waves 1 ft.

SAT
SW winds around 5 kt. Waves 1 ft. 



ANZ537-130815-
Tidal Potomac from Cobb Island to Smith Point-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 to 2 ft. A slight chance
of tstms late this evening. Scattered showers.

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

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 to 10 kt. Waves 1 ft. Showers likely.

WED NIGHT
E winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers.

THU
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 

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



ANZ530-130815-
Chesapeake Bay north of Pooles Island-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 5 to 10 kt. Waves 1 ft. Scattered
showers.

TUE
N winds 5 kt. Waves less than 1 ft.

TUE NIGHT
SW winds around 5 kt. Waves flat.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 kt. Waves less than 1 ft. Showers likely.

THU
NW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 1 ft. Rain likely.

THU NIGHT
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Rain likely.

FRI
NW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

SAT
W winds 5 kt. Waves less than 1 ft. 



ANZ531-130815-
Chesapeake Bay from Pooles Island to Sandy Point-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Scattered showers.

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

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. Rain likely.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Rain likely.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in
the morning.

SAT
W winds 5 to 10 kt. Waves 1 ft. 



ANZ538-130815-
Patapsco River including Baltimore Harbor-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 5 kt. Waves less than 1 ft. Scattered
showers.

TUE
NE winds 5 kt. Waves flat.

TUE NIGHT
S winds 5 kt. Waves flat.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

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

THU
NW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 1 ft. A chance of rain.

THU NIGHT
NW winds 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of rain.

FRI
NW winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning.

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



ANZ539-130815-
Chester River to Queenstown MD-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Scattered showers.

TUE
N winds 5 kt. Waves less than 1 ft.

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. Rain likely.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Rain likely.

FRI
NW winds 10 to 15 kt. Waves 2 ft. A chance of rain in the
morning.

SAT
W winds 5 to 10 kt. Waves 1 ft. 



ANZ532-130815-
Chesapeake Bay from Sandy Point to North Beach-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Scattered showers.

TUE
NE winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

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

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in
the morning.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 



ANZ540-130815-
Eastern Bay-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Scattered showers.

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

TUE NIGHT
S winds 5 kt. Waves flat.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. A chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in
the morning.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 



ANZ533-130815-
Chesapeake Bay from North Beach to Drum Point-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
N winds 10 kt. Waves 1 ft. Scattered showers.

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

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 2 ft. A chance of rain in the
morning.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 



ANZ541-130815-
Choptank River to Cambridge MD and the Little Choptank River-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Scattered showers.

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

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. Showers likely.

WED NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in
the morning.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 



ANZ542-130815-
Patuxent River to Broomes Island MD-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
N winds 5 to 10 kt. Waves 1 ft. Scattered
showers.

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

TUE NIGHT
S winds 5 kt. Waves less than 1 ft.

WED
S winds 5 to 10 kt. Waves 1 ft. Showers likely.

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

THU
NW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 1 ft. A chance of rain.

THU NIGHT
NW winds 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 ft.

SAT
W winds 5 kt. Waves less than 1 ft. 



ANZ534-130815-
Chesapeake Bay from Drum Point to Smith Point-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 2 ft. Numerous showers with
a slight chance of tstms.

TUE
N winds 5 to 10 kt. Waves 2 ft.

TUE NIGHT
E winds 5 kt...becoming S after midnight. Waves 1 ft.

WED
S winds 5 to 10 kt. Waves 1 ft. Showers likely.

WED NIGHT
E winds 5 to 10 kt. Waves 2 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 25 kt. Waves 3 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 2 to 3 ft.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 to 2 ft. 

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



ANZ543-130815-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1105 PM EDT Mon Apr 12 2021

REST OF TONIGHT
NE winds 10 kt. Waves 1 ft. Numerous showers with
a slight chance of tstms.

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

TUE NIGHT
E winds 5 kt...becoming S after midnight. Waves 1 ft.

WED
S winds 5 to 10 kt. Waves 1 ft. Showers likely.

WED NIGHT
E winds 5 to 10 kt. Waves 1 ft. Showers likely.

THU
NW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft. A chance of rain.

THU NIGHT
NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. A
chance of rain.

FRI
NW winds 10 to 15 kt. Waves 1 to 2 ft.

SAT
NW winds 5 to 10 kt...becoming SW. Waves 1 ft. 

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