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National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 181551
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1151 AM EDT Fri Sep 18 2020

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. 

ANZ500-182000-
1151 AM EDT Fri Sep 18 2020

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

Canadian high pressure will build from the Great Lakes toward the
Northeast and Middle Atlantic through early next week. Small Craft
Advisories may be needed Sunday into Monday.



ANZ535-182000-
Tidal Potomac from Key Bridge to Indian Head-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 10 to 15 kt with gusts to 20 kt. Waves
1 ft.

TONIGHT
N winds 10 kt with gusts to 20 kt. Waves 1 ft.

SAT
NE winds 5 to 10 kt. Gusts up to 20 kt until late afternoon.
Waves 1 ft.

SAT NIGHT
N winds around 5 kt. Waves 1 ft.

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

SUN NIGHT
NE winds around 5 kt. Waves 1 ft.

MON
NW winds around 5 kt. Waves 1 ft.

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



ANZ536-182000-
Tidal Potomac from Indian Head to Cobb Island-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Scattered sprinkles.

TONIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SAT
NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SAT NIGHT
N winds 5 to 10 kt. Waves 1 ft.

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

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

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

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



ANZ537-182000-
Tidal Potomac from Cobb Island to Smith Point-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 to 20 kt with gusts to 30 kt. Waves
3 ft. Isolated showers late this morning, then scattered sprinkles
this afternoon.

TONIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft.

SAT
N winds 15 to 20 kt. Gusts up to 30 kt until late afternoon.
Waves 3 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 2 ft.

SUN
NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

SUN NIGHT
NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

MON
NE winds 15 to 20 kt...becoming N 10 kt after midnight. Waves
1 to 2 ft.

TUE
NW winds 10 kt. Waves 1 ft. 



ANZ530-182000-
Chesapeake Bay north of Pooles Island-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 20 kt. Waves 1 to
2 ft...except around 1 ft or less near the mouth of the Susquehanna.

TONIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.

SAT
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SAT NIGHT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
NE winds 10 kt. Waves 1 ft.

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

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

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



ANZ531-182000-
Chesapeake Bay from Pooles Island to Sandy Point-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 to 20 kt with gusts to 25 kt. Waves
3 ft.

TONIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

SAT
N winds 15 to 20 kt with gusts to 25 kt... becoming NE 10 kt
late. Waves 2 to 3 ft.

SAT NIGHT
NE winds 10 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 2 ft.

SUN NIGHT
NE winds 10 kt. Waves 1 ft.

MON
N winds 10 to 15 kt. Waves 1 to 2 ft.

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



ANZ538-182000-
Patapsco River including Baltimore Harbor-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 20 kt. Waves 1 ft.

TONIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.

SAT
NE winds 10 to 15 kt. Gusts up to 20 kt until late afternoon.
Waves 1 ft.

SAT NIGHT
NE winds 5 to 10 kt. Waves 1 ft.

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

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

MON
N winds 5 to 10 kt. Waves 1 ft or less.

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



ANZ539-182000-
Chester River to Queenstown MD-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 20 kt. Waves 2 ft.

TONIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.

SAT
NE winds 15 to 20 kt with gusts to 25 kt... diminishing to
10 kt late. Waves 2 ft.

SAT NIGHT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 1 ft.

SUN NIGHT
NE winds 10 kt. Waves 1 ft.

MON
N winds 10 to 15 kt. Waves 1 ft.

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



ANZ532-182000-
Chesapeake Bay from Sandy Point to North Beach-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 to 20 kt with gusts to 30 kt. Waves
3 ft.

TONIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

SAT
NE winds 15 to 20 kt with gusts to 30 kt... diminishing to
10 kt late. Waves 3 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 2 ft.

SUN NIGHT
NE winds 10 to 15 kt. Waves 2 ft.

MON
N winds 10 to 15 kt. Waves 1 to 2 ft.

TUE
NW winds 10 kt. Waves 1 ft. 



ANZ540-182000-
Eastern Bay-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 2 ft.

TONIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.

SAT
NE winds 15 to 20 kt with gusts to 30 kt... diminishing to
10 kt late. Waves 2 ft.

SAT NIGHT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 1 ft.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft.

MON
N winds 10 to 15 kt. Waves 1 ft.

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



ANZ533-182000-
Chesapeake Bay from North Beach to Drum Point-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 20 kt with gusts to 30 kt. Waves 3 ft.
Scattered showers late this morning, then scattered sprinkles this
afternoon.

TONIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 5 ft.

SAT
N winds 15 to 20 kt with gusts to 30 kt... diminishing to
10 kt late. Waves 3 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 2 ft.

SUN
NE winds 10 to 15 kt. Waves 2 ft.

SUN NIGHT
NE winds 10 to 15 kt. Waves 2 ft.

MON
N winds 10 to 15 kt. Waves 1 to 2 ft.

TUE
NW winds 10 kt. Waves 1 ft. 



ANZ541-182000-
Choptank River to Cambridge MD and the Little Choptank River-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 to 20 kt with gusts to 30 kt. Waves
2 ft. Scattered sprinkles.

TONIGHT
N winds 10 to 15 kt...increasing to 20 to 25 kt in the
late evening and overnight. Gusts up to 30 kt. Waves 3 ft.

SAT
NE winds 15 to 20 kt with gusts to 30 kt... diminishing to
10 kt late. Waves 2 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 1 ft.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft.

MON
N winds 10 to 15 kt. Waves 1 to 2 ft.

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



ANZ542-182000-
Patuxent River to Broomes Island MD-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 1 ft.
Scattered showers late this morning, then scattered sprinkles this
afternoon.

TONIGHT
N winds 10 kt with gusts to 20 kt...increasing to 15 to
20 kt with gusts to 30 kt in the late evening and overnight. Waves
1 ft.

SAT
N winds 10 to 15 kt. Gusts up to 25 kt until late afternoon.
Waves 1 ft.

SAT NIGHT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
NE winds 10 to 15 kt. Waves 1 ft.

SUN NIGHT
NE winds 10 kt. Waves 1 ft.

MON
NE winds 10 to 15 kt...becoming N 5 kt after midnight. Waves
1 ft.

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



ANZ534-182000-
Chesapeake Bay from Drum Point to Smith Point-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 20 kt with gusts to 30 kt. Waves 4 ft.
Isolated showers late this morning, then scattered sprinkles this
afternoon.

TONIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 5 ft.

SAT
N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 2 ft.

SUN
NE winds 15 to 20 kt. Waves 3 ft.

SUN NIGHT
NE winds 15 to 20 kt. Waves 3 ft.

MON
N winds 15 to 20 kt. Waves 2 to 3 ft.

TUE
NW winds 10 to 15 kt. Waves 2 ft. 



ANZ543-182000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1151 AM EDT Fri Sep 18 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING


REST OF TODAY
N winds 15 to 20 kt with gusts to 30 kt. Waves 2 to
3 ft. Isolated showers late this morning, then scattered showers
this afternoon.

TONIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.

SAT
NE winds 15 to 20 kt. Gusts up to 30 kt until late afternoon.
Waves 2 ft.

SAT NIGHT
NE winds 10 to 15 kt. Waves 1 to 2 ft.

SUN
NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

SUN NIGHT
NE winds 15 to 20 kt. Waves 2 ft.

MON
N winds 15 to 20 kt. Waves 1 to 2 ft.

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