Allegheny River at Clinton Lock and Dam, PA
River level and flood forecast · Armstrong County
Normal10.0 ftas of Mon 3 PM
The river is 11.0 ft below flood stage (21 ft).
Forecast to fall to 9.7 ft by Sat, Oct 17, 8 AM.
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 | 24 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 21 ft |
| Action stage | 17 ft |
| Record crest (March 18, 1936) | 26.4 ft |
What floods at each level
From the National Weather Service, highest first.
- 26.4 ftWater reaches the bottom of the first floor window of the powerhouse at Lock 6.
- 23 ftTop of rail of the Pennsylvania Railroad across the river from the lock floods.
- 19 ftLock walls overtopped.
- 17 ftNavigation suspended, lock out of service.
Highest crests on record
- 26.4 ft — March 18, 1936
- 22 ft — June 23, 1972
- 20.3 ft — September 18, 2004
- 19.8 ft — March 16, 2007
- 19.2 ft — December 31, 1990
Recent crests: 17.9 ft (February 8, 2019) · 16.2 ft (March 23, 2007) · 19.8 ft (March 16, 2007) · 20.3 ft (September 18, 2004) · 19.2 ft (December 31, 1990)
Up and down the river, and nearby
- UpstreamAllegheny River at Kittanning Lock and Dam, PA
- DownstreamAllegheny River at Freeport Lock and Dam, PA
- Crooked Creek at Crooked Creek Dam Tailwater, PA
- Buffalo Creek (PA) at Iron Bridge, PA
- Kiskiminetas River at Vandergrift, PA
- Allegheny River at Natrona Lock and Dam, PA
- Crooked Creek at Idaho, PA
- Allegheny River at Mosgrove Lock and Dam, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CLNP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.