Rivers in Pennsylvania
Monongahela River at Charleroi Lock and Dam
Below flood stage
11.53ftStage
Observed Thu, Sep 24, 5:00 AM EDT
- Flood stage
- 28.00 ft
- Forecast crest
- 14.50 ftSun, Sep 27, 8:00 AM EDT
- Record crest
- 42.70 ft1985
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 35.00 ft |
| Moderate flood | 31.00 ft |
| Minor flood | 28.00 ft |
| Action | 22.60 ft |
- 42.70 ftWater reaches the flood of record...Election Day Flood event...November 5, 1985.
- 39.90 ftWater reaches the level of the ST. Patricks Day Flood and crest on March 18, 1936.
- 37.00 ft50 homes are flooded in Roscoe. Flooding also occurs in the towns of Elco, Allenport, and Stockdale.
- 36.00 ftSeveral homes are flooded on Lynn Street in Roscoe.
- 35.90 ftWater levels reach the flood levels of the flood of July 30, 2017.
- 35.00 ftBackwater flooding in Monongahela along Pigeon Creek causes flood waters up to 4.5 feet in businesses in the lowest building in Penos Plaza and up to 6 feet in Armstrong Park. Backwater flooding spreads upstream along Pigeon Creek to the Route 43 overpass on Park Avenue.
- 34.10 ftDivision of American Chain and Cable Co. In Monessen floods.
- 33.15 ftWater reaches the level reached on March 5, 2015.
- 33.00 ftFlooding is widespread in Fayette City.
- 32.00 ftFlooding occurs on Connellsville, Fourth, Cook, and Main Streets in Fayette City
- 31.60 ftLock walls overtopped.
- 30.00 ftBackwater flooding along Pigeon Creek in Monongahela, begins to flood the lowest building in Penos Plaza, Armstrong Park, and closes Wall Street Bridge across Pigeon Creek.
- 29.00 ftNavigation suspended, lock out of service.
- 28.00 ftIn Monongahela, backwater flooding along Pigeon Creek begins from the intersection of Park Way and Park Avenue.
- 26.30 ftWater reaches the level reached during Hurricane Ivan September 18, 2004.
- 26.00 ftRoute 201 in closed due to flooding along Donner's Run.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 19% |
| Moderate flooding | 10% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 22, 2026.
Crest history
53 crests on NOAA’s list since 1936.
| # | Date | Stage |
|---|---|---|
| 1 | November 5, 1985 | 42.70 ft |
| 2 | March 9, 1967 | 41.10 ft |
| 3 | March 18, 1936 | 39.90 ft |
| 4 | January 20, 1996 | 39.80 ft |
| 5 | March 5, 1963 | 39.40 ft |
| 6 | June 4, 1941 | 39.20 ft |
| 7 | February 19, 2000 | 38.50 ft |
| 8 | October 16, 1954 | 38.00 ft |
| 9 | August 6, 1956 | 37.20 ft |
| 10 | March 28, 1963 | 36.10 ft |
| 11 | February 14, 1966 | 35.90 ft |
| 12 | July 30, 2017 | 35.90 ft |
| 13 | June 23, 1972 | 35.40 ft |
| 14 | December 30, 1942 | 35.00 ft |
| 15 | February 10, 1994 | 34.80 ft |
| 16 | November 20, 2003 | 34.60 ft |
| 17 | February 2, 1951 | 34.60 ft |
| 18 | January 27, 1978 | 34.20 ft |
| 19 | February 17, 2018 | 33.54 ft |
| 20 | January 12, 1974 | 33.40 ft |
| 21 | March 5, 2015 | 33.13 ft |
| 22 | January 29, 1994 | 32.80 ft |
| 23 | April 4, 2024 | 32.35 ft |
| 24 | December 14, 2007 | 31.92 ft |
| 25 | January 2, 1965 | 31.90 ft |
Most recent crests
- April 4, 2024: 32.35 ft
- February 5, 2022: 28.16 ft
- March 2, 2021: 31.56 ft
- December 18, 2019: 28.33 ft
- February 7, 2019: 20.01 ft
- September 11, 2018: 30.15 ft
- February 17, 2018: 33.54 ft
- July 30, 2017: 35.90 ft
- March 15, 2015: 25.37 ft
- March 5, 2015: 33.13 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Ohio River Forecast Center. Forecasts are issued routinely year-round. 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.