Potomac River at Williamsport, Washington County MD (WLLM2)
Gage Location: Washington County, MarylandSite Location: Washington County, Maryland
Latitude: 39.609Longitude: -77.848Elevation: 327.7 ft. MSLDrainage Area: 4943 Sq. Mi.
Minor Stage: 23 ft. Moderate Stage: 25 ft.Major Stage: 28 ft.
First Flood: 1936-03-18Last Flood: 1996-09-08 Crest: 31.1 ft.Datum change: 1932-01-01Number of Floods: 8

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MINOR FLOODS
Date of FloodCrest(ft)
MODERATE FLOODS
Date of FloodCrest(ft)
1976-10-0925
MAJOR FLOODS
Date of FloodCrest(ft)
1936-03-1848.6
1937-04-2737
1942-10-1636.1
1972-06-2334
1985-11-0636.3
1996-01-2034.8
1996-09-0831.1
MISSING
Date of FloodCrest(ft)



Categorical Floods by Month
MonthMinor
After
Datum
Minor
Total
Moderate
After
Datum
Moderate
Total
Major
After
Datum
Major
Total
Missing
After
Datum
Missing
Total
January00001100
February00000000
March00001100
April00001100
May00000000
June00001100
July00000000
August00000000
September00001100
October00111100
November00001100
December00000000


Categorical Floods by Season
SeasonMinorModerateMajorMissing
Fall0130
Winter0010
Spring0020
Summer0010