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This probabilistic forecast is issued by the Northeast River Forecast Center.
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About this graph
Forecasts for the Genesee River at Wellsville are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Portageville
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 14
Flood Stage: 11
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 20.70 ft on 06/23/1972
(2) 16.20 ft on 11/25/1950
(3) 16.13 ft on 01/19/1996
(4) 14.90 ft on 01/22/1959
(5) 14.80 ft on 03/05/1964
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.69 ft on 02/18/2022
(2) 11.11 ft on 01/13/2017
(3) 11.55 ft on 01/25/2010
(4) 11.64 ft on 03/15/2007
(5) 16.13 ft on 01/19/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.00 ft on 09/15/1973
(2) 4.20 ft on 08/03/1999
(3) 4.24 ft on 09/29/1980
(4) 4.40 ft on 08/15/1996
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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
20 Extreme flood, levee is topped at 19.9 feet. Widespread flooding along the river throughout Allegany County. Heavy residential damages including Wellsville. Evacuations necessary.
17 Major flood, major flooding all along the Genesee River throughout Allegany County. Commercial and residential damages. Road closures. Levee continues to protect most of Wellsville to 19.9 feet.
14 Moderate flood, general flooding along the river in lowlying areas throughout Allegany County. Some residential and commercial damages. The levee protects most of Wellsville.
11 Flood stage, banks overflow and begin to flood lowlying areas outside the levees in places such as Scio. Minor damages.
9 Action stage, high flows. No flooding.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 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 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics.

Click individual graphics to enlarge.

Observations Courtesy of the U.S. Geological Survey.
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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
Buffalo Weather Forecast Office
587 Aero Drive
Buffalo, NY 14225-1405
(716) 565-0204
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Page last modified: 30-Oct-2020 4:10 PM
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