Allegheny River at Mosgrove Lock and Dam, PA
River level and flood forecast · Armstrong County
Normal9.6 ftas of Mon 4:45 PM
The river is 9.4 ft below flood stage (19 ft).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 24 ft |
| Moderate flood stage | 21 ft |
| Flood stage | 19 ft |
| Action stage | 14 ft |
| Record crest (March 10, 1964) | 27.7 ft |
What floods at each level
From the National Weather Service, highest first.
- 20 ftWater begins to rise on to the road along the river in Templeton PA.
- 15.8 ftLock walls are overtopped.
- 14 ftNavigation suspended. Lock out of service.
Highest crests on record
- 27.7 ft — March 10, 1964
- 25.6 ft — March 5, 1964
- 21.8 ft — December 30, 1942
- 21.7 ft — June 23, 1972
- 20.8 ft — February 14, 1966
Recent crests: 19.18 ft (February 18, 2022) · 17.93 ft (February 8, 2019) · 19.04 ft (March 7, 2011) · 19.08 ft (March 7, 2011) · 19.2 ft (March 16, 2007)
Up and down the river, and nearby
- UpstreamAllegheny River at Rimer Lock and Dam, PA
- DownstreamAllegheny River at Kittanning Lock and Dam, PA
- Red Bank Creek at St Charles, PA
- Mahoning Creek at Mahoning Dam Tailwater, PA
- Crooked Creek at Crooked Creek Dam Tailwater, PA
- Allegheny River at Clinton Lock and Dam, PA
- Buffalo Creek (PA) at Iron Bridge, PA
- Allegheny River at Freeport Lock and Dam, PA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MOSP1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.