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This probabilistic forecast is issued by the Ohio River Forecast Center.
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About this graph
Forecasts for the Monongahela River at Charleroi Lock and Dam are issued routinely year-round.
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Upstream Gauge - at Maxwell Lock and Dam (lower pool) Upstream Gauge Downstream Gauge Downstream Gauge - at Elizabeth Lock and Dam
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 35
Moderate Flood Stage: 31
Flood Stage: 28
Action Stage: 22.6
Low Stage (in feet): -9999

Historic Crests
(1) 42.70 ft on 11/05/1985
(2) 41.10 ft on 03/09/1967
(3) 39.90 ft on 03/18/1936
(4) 39.80 ft on 01/20/1996
(5) 39.40 ft on 03/05/1963
(6) 39.20 ft on 06/04/1941
(7) 38.50 ft on 02/19/2000
(8) 38.00 ft on 10/16/1954
(9) 37.20 ft on 08/06/1956
(10) 36.10 ft on 03/28/1963
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 32.35 ft on 04/04/2024
(2) 28.16 ft on 02/05/2022 (P)
(3) 31.56 ft on 03/02/2021 (P)
(4) 28.33 ft on 12/18/2019
(5) 20.01 ft on 02/07/2019
(6) 30.15 ft on 09/11/2018 (P)
(7) 33.54 ft on 02/17/2018
(8) 35.90 ft on 07/30/2017
(9) 25.37 ft on 03/15/2015
(10) 33.13 ft on 03/05/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
42.7 Water reaches the flood of record...Election Day Flood event...November 5, 1985.
39.9 Water reaches the level of the ST. Patricks Day Flood and crest on March 18, 1936.
37 50 homes are flooded in Roscoe. Flooding also occurs in the towns of Elco, Allenport, and Stockdale.
36 Several homes are flooded on Lynn Street in Roscoe.
35.9 Water levels reach the flood levels of the flood of July 30, 2017.
35 Backwater 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.
34.1 Division of American Chain and Cable Co. In Monessen floods.
33.15 Water reaches the level reached on March 5, 2015.
33 Flooding is widespread in Fayette City.
32 Flooding occurs on Connellsville, Fourth, Cook, and Main Streets in Fayette City
31.6 Lock walls overtopped.
30 Backwater 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 Navigation suspended, lock out of service.
28 In Monongahela, backwater flooding along Pigeon Creek begins from the intersection of Park Way and Park Avenue.
26.3 Water reaches the level reached during Hurricane Ivan September 18, 2004.
26 Route 201 in closed due to flooding along Donner's Run.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) 10 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Pittsburgh Weather Forecast Office
192 Shafer Road
Moon Township, PA 15108
(412) 262-1591
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Page last modified: 2-Nov-2020 7:30 PM
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