Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

DID YOU KNOW... Please try our new TEST hydrograph page link at: https://preview.water.noaa.gov/gauges/abcde - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become water.noaa.gov.  Feedback can be provided HERE

Weather Forecast Office Buffalo, NY

Northeast River Forecast Center

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EST) Datum: NAVD88 Metadata

NOTE: Impact statements listed below may not be representative during times of ice jam flooding. NOTE: Stage may be affected by ice during winter months. NOTE: Forecasts for the Genesee River at Portageville are issued routinely year-round.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Downstream Gauge

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

Zoom Level:16 Legend FEMA Layer 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

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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.

About This Location

Latitude: 42.570278° N, Longitude: 78.042222° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 19 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 1079.72 1098.72 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 1080.00 1099.00 Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: Corps of Engineers (COE) Info for Portageville U.S. Geological Survey (USGS) Data and Site Info for Portageville

Additional Information

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) 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.

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Ohio Basin Water Resouces Outlook Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Northeast River Forecast Center Ohio River Forecast Center Snow Information Ensemble River Forecasts Hourly Precipitation

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 Buffalo Weather Forecast Office 587 Aero Drive Buffalo, NY 14225-1405 (716) 565-0204 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:30 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities