Allegheny River at Sharpsburg Lock and Dam, PA
River level and flood forecast · Allegheny County
Normal11.1 ftas of Mon 3:30 PM
The river is 9.9 ft below flood stage (21 ft).
Forecast to rise to 11.3 ft Tue 8 AM, below the 21 ft flood stage.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 9:20 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 23 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 21 ft |
| Action stage | 16.3 ft |
| Record crest (June 24, 1972) | 26.9 ft |
What floods at each level
From the National Weather Service, highest first.
- 23.1 ft13th Street floods in Sharpsburg.
- 21.7 ftTrumbull Construction Co on 51st Street floods.
- 21.3 ftFlooding begins near the M & M Gas Station on North Main Street in Sharpsburg.
- 21 ftLock wall overtopped.
- 19 ftNavigation suspended, lock out of service.
Highest crests on record
- 26.9 ft — June 24, 1972
- 22.9 ft — January 20, 1996
- 22.1 ft — September 18, 2004
- 18.5 ft — March 16, 2007
- 16.2 ft — March 24, 2007
Recent crests: 16.2 ft (March 24, 2007) · 18.5 ft (March 16, 2007) · 22.1 ft (September 18, 2004) · 22.9 ft (January 20, 1996) · 26.9 ft (June 24, 1972)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SHRP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.