Rivers in Pennsylvania
Allegheny River at Mosgrove Lock and Dam
Below flood stage
9.61ftStage
Observed Tue, Sep 29, 2:45 AM EDT
- Flood stage
- 19.00 ft
- Record crest
- 27.70 ft1964
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 24.00 ft |
| Moderate flood | 21.00 ft |
| Minor flood | 19.00 ft |
| Action | 14.00 ft |
- 20.00 ftWater begins to rise on to the road along the river in Templeton PA.
- 15.80 ftLock walls are overtopped.
- 14.00 ftNavigation suspended. Lock out of service.
Flood outlook
Chance of flooding, October to December
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 29, 2026.
Crest history
17 crests on NOAA’s list since 1936.
| # | Date | Stage |
|---|---|---|
| 1 | March 10, 1964 | 27.70 ft |
| 2 | March 5, 1964 | 25.60 ft |
| 3 | December 30, 1942 | 21.80 ft |
| 4 | June 23, 1972 | 21.70 ft |
| 5 | February 14, 1966 | 20.80 ft |
| 6 | September 18, 2004 | 20.40 ft |
| 7 | February 21, 1972 | 20.10 ft |
| 8 | March 18, 1936 | 19.60 ft |
| 9 | February 17, 1976 | 19.30 ft |
| 10 | March 16, 2007 | 19.20 ft |
| 11 | February 18, 2022 | 19.18 ft |
| 12 | March 7, 2011 | 19.08 ft |
| 13 | March 7, 2011 | 19.04 ft |
| 14 | September 10, 2004 | 19.00 ft |
| 15 | December 31, 1990 | 18.70 ft |
| 16 | February 8, 2019 | 17.93 ft |
| 17 | February 3, 1970 | 17.70 ft |
Most recent crests
- February 18, 2022: 19.18 ft
- February 8, 2019: 17.93 ft
- March 7, 2011: 19.04 ft
- March 7, 2011: 19.08 ft
- March 16, 2007: 19.20 ft
- September 18, 2004: 20.40 ft
- September 10, 2004: 19.00 ft
- December 31, 1990: 18.70 ft
- February 17, 1976: 19.30 ft
- June 23, 1972: 21.70 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamAllegheny River at Rimer Lock and Dam
- DownstreamAllegheny River at Kittanning Lock and Dam
- Red Bank Creek at St Charles
- Mahoning Creek at Mahoning Dam Tailwater
- Mahoning Creek at Mahoning Dam Pool
- Crooked Creek at Crooked Creek Dam Tailwater
- Crooked Creek at Crooked Ck. Dam Pool
- Allegheny River at Clinton Lock and Dam
What this means
Forecasts by the Ohio River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. The above river forecast includes future rainfall/snowmelt. Forecast stages may be different if the actual rainfall/snowmelt is different than the forecast rainfall/snowmelt. Stage may be affected by ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.