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Web Portal Changes: In Spring 2024, the Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS) at a repurposed A preview of NWPS is available here, where you can see your station hydrograph by replacing SSSSS with the station 5-character id:

Flood Inundation Mapping: Experimental real-time flood Inundation mapping services for 10% of the United States are now available via the NWS Map Viewer. Additional products and geospatial services depicting River Forecast Center and National Water Model forecasts continue to be accessible as described in the StoryMap here.

Please visit for more information.

Hydrograph River at a Glance Download
Genesee River at Rochester Stage (ft)Flow (kcfs)Observed: 6.29 ft at 7:00AM Feb 24, 2024Highest Observation: 6.54 ft at 7:00AM Feb 25, 2024Observed: 5.85 ft at 7:00AM Feb 26, 2024Highest Forecast: 6 ft 1:00PM Feb 26, 2024Forecast: 5.9 ft 7:00PM Feb 26, 2024Forecast: 5.8 ft 1:00AM Feb 27, 2024Forecast: 5.8 ft 7:00AM Feb 27, 2024Forecast: 5.7 ft 1:00PM Feb 27, 2024Forecast: 5.7 ft 7:00PM Feb 27, 2024Forecast: 5.6 ft 1:00AM Feb 28, 2024Forecast: 5.6 ft 7:00AM Feb 28, 2024RHRN6(plotting HGIRZ) Graph Created (11:01AM Feb 26, 2024)ObservedForecast (issued 11:16AM Feb 25)Latest observed value: 5.85 ft at 7:00 AM EST 26-Feb-2024. Flood Stage is 15 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
NOTE: Gauge readings received once daily during low-water and more frequently during high water.

NOTE: Gauge readings are temporarily unavailable.

NOTE: Forecasts for the Genesee River at Rochester are issued routinely year-round.

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Upstream Gauge - at Avon Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 19
Flood Stage: 15
Action Stage: 13
Low Stage (in feet): -9999

Historic Crests
(1) 24.50 ft on 03/18/1865
(2) 23.00 ft on 03/31/1916
(3) 20.20 ft on 04/04/1896
(4) 19.08 ft on 04/02/1940
(5) 18.96 ft on 03/19/1942
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.17 ft on 11/07/2017
(2) 16.80 ft on 01/10/1998
(3) 15.54 ft on 04/02/1993
(4) 15.22 ft on 05/11/1989
(5) 17.55 ft on 04/25/1984
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.60 ft on 10/06/1973
(2) 2.80 ft on 08/03/1999
(3) 3.00 ft on 08/15/1996
Zoom Level:16
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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
24 Major flood, Rochester flood walls topped. Major and extensive flooding with damages in residential and commercial areas south of downtown and south suburbs. Evacuations possible. Canal locks topped at 23 feet, additional flooding. Flow = 55000 cfs.
19 Moderate flood, more widespread flooding southern suburbs. Areas above upper falls start to flood, including Bausch and Lomb and Barnard Simmons Plants. Flow 33000 cfs.
15 Flood stage, minor flood, some residential flooding begins in southern suburbs, mile 12-18 in Henrietta and Chili. Flow 20000 cfs.
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Latitude: 43.180556° N, Longitude: 77.627778° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 15 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 244.24 ft 259.24 ft  
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.

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Hydrologic Resources Additional Resources
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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
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Buffalo, NY 14225-1405
(716) 565-0204
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Page last modified: 2-Nov-2020 7:30 PM
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