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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 Portageville are issued routinely year-round.
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Upstream Gauge - at Wellsville Upstream Gauge Downstream Gauge Downstream Gauge - at Mount Morris Dam
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 29
Moderate Flood Stage: 25
Flood Stage: 19
Action Stage: 17
Low Stage (in feet): -9999

Historic Crests
(1) 35.25 ft on 06/23/1972
(2) 29.12 ft on 07/06/1902
(3) 29.12 ft on 01/20/1996
(4) 25.54 ft on 09/29/1967
(5) 24.90 ft on 05/17/1916
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 20.19 ft on 01/13/2018
(2) 19.73 ft on 01/13/2017
(3) 20.65 ft on 03/15/2007
(4) 24.19 ft on 01/08/1998
(5) 29.12 ft on 01/20/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 6.65 ft on 06/27/2012
(2) 6.68 ft on 07/11/2011
(3) 6.69 ft on 09/29/2014
(4) 6.72 ft on 08/29/2012
(5) 6.81 ft on 09/14/2016
Show More Low Water Records
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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
29 Major flood, widespread residential, commercial, and agricultural flooding. Heavy damages. Road closures. Possible evacuations.
25 Moderate flood, widespread flooding to agricultural land. Some residential flooding and damages begin. Possible road closures.
19 Flood stage, river begins to overflow into agricultural lands from Belfast to Letchworth. Little damage to structures.
17 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.
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
Buffalo Weather Forecast Office
587 Aero Drive
Buffalo, NY 14225-1405
(716) 565-0204
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Page last modified: 2-Nov-2020 7:30 PM
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