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This probabilistic forecast is issued by the Ohio River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

For official forecast click here

Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey

About this graph

Forecasts for the Allegheny River at Freeport Lock and Dam are issued as needed during times of high water, but are not routinely available.

Return to Area Map

Upstream Gauge

Downstream Gauge

Zoom Level:16

Flood Categories (in feet)

Major Flood Stage:	26
Moderate Flood Stage:	24
Flood Stage:	23
Action Stage:	16
Low Stage (in feet):	-9999

Historic Crests
(1) 33.30 ft on 03/18/1936
(2) 25.70 ft on 12/30/1942
(3) 25.30 ft on 03/10/1964
(4) 25.00 ft on 01/20/1996
(5) 24.80 ft on 01/22/1959
(6) 24.50 ft on 06/23/1972
(7) 24.10 ft on 09/18/2004
(8) 23.60 ft on 03/16/2007
(9) 23.30 ft on 03/05/1964
(10) 22.70 ft on 02/14/1966
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 22.58 ft on 02/19/2022
(2) 18.50 ft on 03/23/2007
(3) 23.60 ft on 03/16/2007
(4) 24.10 ft on 09/18/2004
(5) 25.00 ft on 01/20/1996
(6) 22.50 ft on 12/31/1990
(7) 22.20 ft on 06/21/1989
(8) 24.50 ft on 06/23/1972
(9) 22.70 ft on 02/14/1966
(10) 25.30 ft on 03/10/1964
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980

	Gauge Location	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

If you notice any errors in the below information, please contact our Webmaster
33.29	Water reaches the record flood level of the ST. Patricks Day Flood and crest on March 18, 1936.
25	Some buildings in the industrial park 1/4 mile upstream from the Lock begin to flood.
24.1	Water reaches the level reached during Hurricane Ivan September 18, 2004. Freeport received 6 inches of rain.
22.8	Backwater from Buffalo Creek surrounds the sewage disposal plant on Lower Market Street. Basements on First, Second and Lower High and Market Streets in town begin to flood.
20.2	Lock walls overtopped.
16	Navigation suspended. Lock out of service.

Other Real-time and/or Archive Data Sources:

Additional Information

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)

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

Collaborative Agencies

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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