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

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Hydrograph River at a Glance Download
Genesee River at Mount Morris Dam Pool (ft)Observed: 592.36 ft at 10:30PM Feb 25, 2024Observed: 592.37 ft at 11:00PM Feb 25, 2024Observed: 592.36 ft at 11:30PM Feb 25, 2024Observed: 592.33 ft at 12:00AM Feb 26, 2024Observed: 592.31 ft at 12:30AM Feb 26, 2024Observed: 592.23 ft at 1:00AM Feb 26, 2024Observed: 592.18 ft at 1:30AM Feb 26, 2024Observed: 592.29 ft at 2:00AM Feb 26, 2024Observed: 592.29 ft at 2:30AM Feb 26, 2024Observed: 592.31 ft at 3:00AM Feb 26, 2024Observed: 592.32 ft at 3:30AM Feb 26, 2024Observed: 592.31 ft at 4:00AM Feb 26, 2024Observed: 592.32 ft at 4:30AM Feb 26, 2024Observed: 592.32 ft at 5:00AM Feb 26, 2024Observed: 592.31 ft at 5:30AM Feb 26, 2024Observed: 592.3 ft at 6:00AM Feb 26, 2024Observed: 592.31 ft at 6:30AM Feb 26, 2024Observed: 592.29 ft at 7:00AM Feb 26, 2024Observed: 592.29 ft at 7:30AM Feb 26, 2024Observed: 592.26 ft at 8:00AM Feb 26, 2024Observed: 592.24 ft at 8:30AM Feb 26, 2024Observed: 592.2 ft at 9:00AM Feb 26, 2024Observed: 592.21 ft at 9:30AM Feb 26, 2024Observed: 592.2 ft at 10:00AM Feb 26, 2024Observed: 592.21 ft at 10:30AM Feb 26, 2024Observed: 592.25 ft at 11:00AM Feb 26, 2024Observed: 592.29 ft at 11:30AM Feb 26, 2024Observed: 592.34 ft at 12:00PM Feb 26, 2024Observed: 592.37 ft at 12:30PM Feb 26, 2024Observed: 592.4 ft at 1:00PM Feb 26, 2024Observed: 592.43 ft at 1:30PM Feb 26, 2024Observed: 592.44 ft at 2:00PM Feb 26, 2024Observed: 592.43 ft at 2:30PM Feb 26, 2024Observed: 592.44 ft at 3:00PM Feb 26, 2024Observed: 592.45 ft at 3:30PM Feb 26, 2024Observed: 592.42 ft at 4:00PM Feb 26, 2024Observed: 592.4 ft at 4:30PM Feb 26, 2024Observed: 592.37 ft at 5:00PM Feb 26, 2024Observed: 592.37 ft at 5:30PM Feb 26, 2024Observed: 592.33 ft at 6:00PM Feb 26, 2024Observed: 592.31 ft at 6:30PM Feb 26, 2024Observed: 592.31 ft at 7:00PM Feb 26, 2024Observed: 592.31 ft at 7:30PM Feb 26, 2024Observed: 592.32 ft at 8:00PM Feb 26, 2024Observed: 592.34 ft at 8:30PM Feb 26, 2024Observed: 592.33 ft at 9:00PM Feb 26, 2024Observed: 592.34 ft at 9:30PM Feb 26, 2024Observed: 592.34 ft at 10:00PM Feb 26, 2024Observed: 592.35 ft at 10:30PM Feb 26, 2024Observed: 592.34 ft at 11:00PM Feb 26, 2024Observed: 592.33 ft at 11:30PM Feb 26, 2024Observed: 592.32 ft at 12:00AM Feb 27, 2024Observed: 592.32 ft at 12:30AM Feb 27, 2024Observed: 592.3 ft at 1:00AM Feb 27, 2024Observed: 592.29 ft at 1:30AM Feb 27, 2024Observed: 592.3 ft at 2:00AM Feb 27, 2024Observed: 592.29 ft at 2:30AM Feb 27, 2024Observed: 592.29 ft at 3:00AM Feb 27, 2024Observed: 592.24 ft at 3:30AM Feb 27, 2024Observed: 592.26 ft at 4:00AM Feb 27, 2024Observed: 592.25 ft at 4:30AM Feb 27, 2024Observed: 592.23 ft at 5:00AM Feb 27, 2024Observed: 592.22 ft at 5:30AM Feb 27, 2024Observed: 592.21 ft at 6:00AM Feb 27, 2024Observed: 592.2 ft at 6:30AM Feb 27, 2024Observed: 592.18 ft at 7:00AM Feb 27, 2024Observed: 592.18 ft at 7:30AM Feb 27, 2024Observed: 592.18 ft at 8:00AM Feb 27, 2024Observed: 592.17 ft at 8:30AM Feb 27, 2024Observed: 592.18 ft at 9:00AM Feb 27, 2024Observed: 592.16 ft at 9:30AM Feb 27, 2024Observed: 592.15 ft at 10:00AM Feb 27, 2024Observed: 592.16 ft at 10:30AM Feb 27, 2024Observed: 592.16 ft at 11:00AM Feb 27, 2024Observed: 592.16 ft at 11:30AM Feb 27, 2024Observed: 592.16 ft at 12:00PM Feb 27, 2024Observed: 592.16 ft at 12:30PM Feb 27, 2024Observed: 592.15 ft at 1:00PM Feb 27, 2024Observed: 592.19 ft at 1:30PM Feb 27, 2024Observed: 592.18 ft at 2:00PM Feb 27, 2024Observed: 592.18 ft at 2:30PM Feb 27, 2024Observed: 592.18 ft at 3:00PM Feb 27, 2024Observed: 592.21 ft at 3:30PM Feb 27, 2024Observed: 592.21 ft at 4:00PM Feb 27, 2024Observed: 592.19 ft at 4:30PM Feb 27, 2024Observed: 592.21 ft at 5:00PM Feb 27, 2024Observed: 592.2 ft at 5:30PM Feb 27, 2024Observed: 592.19 ft at 6:00PM Feb 27, 2024Observed: 592.21 ft at 6:30PM Feb 27, 2024Observed: 592.19 ft at 7:00PM Feb 27, 2024Observed: 592.21 ft at 7:30PM Feb 27, 2024Observed: 592.21 ft at 8:00PM Feb 27, 2024Observed: 592.24 ft at 8:30PM Feb 27, 2024Observed: 592.23 ft at 9:00PM Feb 27, 2024Observed: 592.24 ft at 9:30PM Feb 27, 2024Observed: 592.24 ft at 10:00PM Feb 27, 2024Observed: 592.24 ft at 10:30PM Feb 27, 2024Observed: 592.26 ft at 11:00PM Feb 27, 2024Observed: 592.26 ft at 11:30PM Feb 27, 2024Observed: 592.27 ft at 12:00AM Feb 28, 2024Observed: 592.27 ft at 12:30AM Feb 28, 2024Observed: 592.27 ft at 1:00AM Feb 28, 2024Observed: 592.25 ft at 1:30AM Feb 28, 2024Observed: 592.26 ft at 2:00AM Feb 28, 2024Observed: 592.27 ft at 2:30AM Feb 28, 2024Observed: 592.26 ft at 3:00AM Feb 28, 2024Observed: 592.26 ft at 3:30AM Feb 28, 2024Observed: 592.25 ft at 4:00AM Feb 28, 2024Observed: 592.27 ft at 4:30AM Feb 28, 2024Observed: 592.29 ft at 5:00AM Feb 28, 2024Observed: 592.3 ft at 5:30AM Feb 28, 2024Observed: 592.32 ft at 6:00AM Feb 28, 2024Observed: 592.34 ft at 6:30AM Feb 28, 2024Observed: 592.36 ft at 7:00AM Feb 28, 2024Observed: 592.38 ft at 7:30AM Feb 28, 2024Observed: 592.4 ft at 8:00AM Feb 28, 2024Observed: 592.4 ft at 8:30AM Feb 28, 2024Observed: 592.44 ft at 9:00AM Feb 28, 2024Observed: 592.47 ft at 9:30AM Feb 28, 2024Observed: 592.49 ft at 10:00AM Feb 28, 2024Observed: 592.53 ft at 10:30AM Feb 28, 2024Observed: 592.56 ft at 11:00AM Feb 28, 2024Observed: 592.58 ft at 11:30AM Feb 28, 2024Observed: 592.67 ft at 12:00PM Feb 28, 2024Observed: 592.73 ft at 12:30PM Feb 28, 2024Observed: 592.74 ft at 1:00PM Feb 28, 2024Observed: 592.87 ft at 1:30PM Feb 28, 2024Observed: 592.97 ft at 2:00PM Feb 28, 2024Observed: 593.15 ft at 2:30PM Feb 28, 2024Observed: 593.31 ft at 3:00PM Feb 28, 2024Observed: 593.47 ft at 3:30PM Feb 28, 2024Observed: 593.68 ft at 4:00PM Feb 28, 2024Observed: 593.85 ft at 4:30PM Feb 28, 2024Observed: 594.2 ft at 5:00PM Feb 28, 2024Observed: 594.61 ft at 5:30PM Feb 28, 2024Observed: 594.74 ft at 6:00PM Feb 28, 2024Observed: 595.28 ft at 6:30PM Feb 28, 2024Observed: 595.81 ft at 7:00PM Feb 28, 2024Observed: 596.35 ft at 7:30PM Feb 28, 2024Observed: 596.93 ft at 8:00PM Feb 28, 2024Observed: 597.52 ft at 8:30PM Feb 28, 2024Highest Observation: 598.02 ft at 9:00PM Feb 28, 2024Forecast: 603 ft 1:00AM Feb 29, 2024Forecast: 607.3 ft 7:00AM Feb 29, 2024Forecast: 609.5 ft 1:00PM Feb 29, 2024Forecast: 612.1 ft 7:00PM Feb 29, 2024Forecast: 614 ft 1:00AM Mar 01, 2024Forecast: 615.3 ft 7:00AM Mar 01, 2024Forecast: 616.1 ft 1:00PM Mar 01, 2024Forecast: 616.3 ft 7:00PM Mar 01, 2024Highest Forecast: 616.4 ft 1:00AM Mar 02, 2024Forecast: 616.2 ft 7:00AM Mar 02, 2024MMDN6(plotting HPIRG) Graph Created (10:01PM Feb 28, 2024)ObservedForecast (issued 11:23AM Feb 28)Latest observed value: 598.02 ft at 9:00 PM EST 28-Feb-2024. Flood Stage is 760 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Stage may be affected by ice during winter months.

NOTE: Forecasts for the Genesee River at Mount Morris Dam are issued routinely year-round.

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Upstream Gauge - at Portageville Upstream Gauge Downstream Gauge Downstream Gauge - at Avon
Flood Categories (in feet)
Major Flood Stage: 760
Moderate Flood Stage: 760
Flood Stage: 760
Action Stage: 720
Low Stage (in feet): -9999

Historic Crests
(1) 755.00 ft on 06/23/1972

(P): Preliminary values subject to further review.

Recent Crests
(1) 755.00 ft on 06/23/1972

(P): Preliminary values subject to further review.

Low Water Records
(1) 575.00 ft on 09/01/1998
(2) 584.00 ft on 08/15/1996
Zoom Level:16
KML Image
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
760 Flood stage, capacity of dam is reached. Spillway utilized. Dam must release flow. Major flooding likely downstream all the way to Rochester area. Co-ordination necessary among affected agencies for possible evacuations.
720 Action-alert stage. Pool significantly full. Increase monitoring.
600 Conservation pool, June 15 to November 1, maintained as close to this level as possible.
584 Pool elevation. Typical low level-uncontrolled.
575 River bed elevation.
About This Location Collapse

Latitude: 42.730556° N, Longitude: 77.904444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 760 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 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 0 ft 760 ft  

Current/Historical Observations:

Additional Information Collapse
Observations courtesy of the U.S. Army Corps Engineers.
Resources Collapse
Hydrologic Resources Additional Resources
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
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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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