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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 Braddock Lock and Dam are issued routinely year-round.
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Upstream Gauge - at Elizabeth Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Pittsburgh
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 23
Flood Stage: 22
Action Stage: 18.2
Low Stage (in feet): -9999

Historic Crests
(1) 35.30 ft on 03/18/1936
(2) 29.70 ft on 06/24/1972
(3) 29.10 ft on 01/20/1996
(4) 28.60 ft on 11/06/1985
(5) 28.20 ft on 10/16/1954
(6) 27.10 ft on 12/30/1942
(7) 24.20 ft on 02/20/2000
(8) 23.10 ft on 11/20/2003
(9) 22.58 ft on 02/17/2018 (P)
(10) 22.52 ft on 09/11/2018
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.84 ft on 02/09/2019
(2) 22.52 ft on 09/11/2018
(3) 22.58 ft on 02/17/2018 (P)
(4) 21.13 ft on 07/30/2017
(5) 21.71 ft on 03/05/2015
(6) 21.40 ft on 01/06/2005
(7) 20.70 ft on 09/18/2004
(8) 21.30 ft on 03/07/2004
(9) 21.40 ft on 02/07/2004
(10) 23.10 ft on 11/20/2003
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 9.00 ft on 01/01/1901
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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
29 Back water flooding along the Youghiogheny River causes widespread flooding from McKeesport upstream to Boston. Water will reach a depth of 3 to 4 feet at the intersection Market and Buena Vista Streets in McKeesport, and 3 to 4 feet at intersection of 37th and Walnut Streets in Versailles.
28 Severe flooding occurs at communities of Braddock, Dravosburg, Rankin and others.
24.8 Thirty homes along Route 837 in Dravosburg flood.
24.05 Water levels reach the flood levels of the flood of July 30, 2017.
24 Sewers back up in McKeesport along Market, 12th and 13th streets affecting the Riverside Senior Care Center, Kane Hospital and Isbir Manor.
23 Backwater flooding along the Youghiogheny river in McKeesport will flood the lower parking lot and dock area of the McKees Point boat complex. Backwater flooding further upstream on the Youghiogheny River will flood the lower parking lot of the community park near the Boston bridge in Boston.
22 Sewers begin to back up along 12th, 13th and Buena Vista streets in McKeesport prompting evacuations to begin. In Boston, backwater flooding on the Youghiogheny River will begin to flood the restaurant on Saint David Street.
20.8 Lock walls overtopped.
19 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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