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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 Ohio River at Montgomery Lock and Dam are issued routinely year-round.
Return to Area Map

Upstream Gauge - at Dashields Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Wellsville
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 38
Moderate Flood Stage: 36
Flood Stage: 33
Action Stage: 23.3
Low Stage (in feet): -9999

Historic Crests
(1) 55.00 ft on 03/18/1936
(2) 47.90 ft on 12/31/1942
(3) 43.10 ft on 06/24/1972
(4) 43.00 ft on 10/17/1954
(5) 43.00 ft on 01/19/1996
(6) 42.00 ft on 03/11/1964
(7) 42.00 ft on 03/11/1966
(8) 41.30 ft on 01/23/1959
(9) 41.00 ft on 09/19/2004
(10) 40.50 ft on 01/28/1952
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 33.85 ft on 09/11/2018
(2) 37.49 ft on 09/11/2018
(3) 33.57 ft on 02/17/2018
(4) 24.20 ft on 03/24/2007
(5) 28.30 ft on 03/16/2007
(6) 36.90 ft on 01/07/2005
(7) 41.00 ft on 09/19/2004
(8) 27.80 ft on 09/10/2004
(9) 29.90 ft on 07/20/1996
(10) 24.60 ft on 05/18/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 9.01 ft on 09/25/1950
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
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
55 This was the st. Patricks day flood of 1936. This crest occurred before flood control projects were in place at numerous locations upstream.
40.5 Lock walls overtopped.
37 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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