Allegheny River at C.W. Bill Young Lock and Dam, PA
River level and flood forecast · Allegheny County
Normal10.9 ftas of Mon 3:45 PM
The river is 6.1 ft below flood stage (17 ft).
Forecast to rise to 11.2 ft Tue 2 AM, below the 17 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 | 20 ft |
| Flood stage | 17 ft |
| Action stage | 15 ft |
| Record crest (March 18, 1936) | 31.1 ft |
What floods at each level
From the National Weather Service, highest first.
- 22.7 ftState Route 366 is flooded.
- 20 ftLock walls overtopped.
- 19 ftLock 3 ceases operations for navigation.
- 18 ftNavigation suspended, lock out of service.
- 17.7 ftBasement flooding begins in New Kensington.
Highest crests on record
- 31.1 ft — March 18, 1936
- 23.3 ft — December 30, 1942
- 21.4 ft — March 10, 1964
- 21.1 ft — January 22, 1959
- 20.9 ft — June 23, 1972
Recent crests: 17.45 ft (April 13, 2024) · 17.07 ft (February 19, 2022) · 16.2 ft (February 9, 2019) · 17.19 ft (March 7, 2011) · 16 ft (March 24, 2007)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (ACMP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.