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Advanced Hydrologic Prediction Service
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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 Elizabeth Lock and Dam are issued routinely year-round.
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Upstream Gauge - at Charleroi Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Braddock Lock and Dam
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 26
Moderate Flood Stage: 23
Flood Stage: 20
Action Stage: 16.5
Low Stage (in feet): -9999

Historic Crests
(1) 32.50 ft on 03/18/1936
(2) 31.60 ft on 11/06/1985
(3) 30.30 ft on 01/20/1996
(4) 29.00 ft on 06/24/1972
(5) 28.50 ft on 10/16/1954
(6) 28.30 ft on 03/07/1967
(7) 27.60 ft on 02/19/2000
(8) 26.77 ft on 04/16/2007
(9) 26.50 ft on 03/06/1963
(10) 25.60 ft on 05/25/1968
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 20.17 ft on 02/05/2022 (P)
(2) 22.87 ft on 03/02/2021 (P)
(3) 20.05 ft on 12/18/2019
(4) 18.10 ft on 02/08/2019
(5) 22.87 ft on 09/11/2018 (P)
(6) 24.53 ft on 02/17/2018
(7) 24.05 ft on 07/30/2017
(8) 18.43 ft on 03/05/2015
(9) 23.77 ft on 03/05/2015
(10) 20.60 ft on 01/26/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980
KML Image
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
32 Elizabeth immediately downstream of Lock 3 floods.
30.5 Water Street, First Street and Second Street in West Elizabeth flood. Flood waters are 4 to 5 feet deep in homes along Water Street.
27 Serious damage to homes and industries in West Elizabeth. Many roads flood.
25.6 Water reaches the first floor of numerous homes from the intersection of First and Border Streets north to the intersection of Mill and First streets in West Elizabeth.
24.05 Water levels reach the flood levels of the flood of July 30, 2017.
23 Industrial Chemical Corporation plant floods.
22 In West Elizabeth basements of numerous homes in the block bounded by First and Water streets begin to flood.
20 Small communities around Lock 3 area begin minor flooding.
18.1 Lock walls overtopped.
17.5 Navigation suspended, lock out of service.

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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