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Hydrograph River at a Glance Download
Genesee River at Portageville Stage (ft)Flow (kcfs)Highest Observation: 9.6 ft at 7:00PM May 23, 2022Observed: 9.58 ft at 7:15PM May 23, 2022Observed: 9.56 ft at 7:30PM May 23, 2022Observed: 9.54 ft at 7:45PM May 23, 2022Observed: 9.53 ft at 8:00PM May 23, 2022Observed: 9.52 ft at 8:15PM May 23, 2022Observed: 9.51 ft at 8:30PM May 23, 2022Observed: 9.49 ft at 8:45PM May 23, 2022Observed: 9.48 ft at 9:00PM May 23, 2022Observed: 9.47 ft at 9:15PM May 23, 2022Observed: 9.47 ft at 9:30PM May 23, 2022Observed: 9.46 ft at 9:45PM May 23, 2022Observed: 9.45 ft at 10:00PM May 23, 2022Observed: 9.45 ft at 10:15PM May 23, 2022Observed: 9.44 ft at 10:30PM May 23, 2022Observed: 9.44 ft at 10:45PM May 23, 2022Observed: 9.43 ft at 11:00PM May 23, 2022Observed: 9.43 ft at 11:15PM May 23, 2022Observed: 9.43 ft at 11:30PM May 23, 2022Observed: 9.42 ft at 11:45PM May 23, 2022Observed: 9.41 ft at 12:00AM May 24, 2022Observed: 9.41 ft at 12:15AM May 24, 2022Observed: 9.41 ft at 12:30AM May 24, 2022Observed: 9.4 ft at 12:45AM May 24, 2022Observed: 9.4 ft at 1:00AM May 24, 2022Observed: 9.4 ft at 1:15AM May 24, 2022Observed: 9.4 ft at 1:30AM May 24, 2022Observed: 9.39 ft at 1:45AM May 24, 2022Observed: 9.39 ft at 2:00AM May 24, 2022Observed: 9.39 ft at 2:15AM May 24, 2022Observed: 9.38 ft at 2:30AM May 24, 2022Observed: 9.38 ft at 2:45AM May 24, 2022Observed: 9.38 ft at 3:00AM May 24, 2022Observed: 9.37 ft at 3:15AM May 24, 2022Observed: 9.37 ft at 3:30AM May 24, 2022Observed: 9.37 ft at 3:45AM May 24, 2022Observed: 9.37 ft at 4:00AM May 24, 2022Observed: 9.37 ft at 4:15AM May 24, 2022Observed: 9.36 ft at 4:30AM May 24, 2022Observed: 9.36 ft at 4:45AM May 24, 2022Observed: 9.36 ft at 5:00AM May 24, 2022Observed: 9.36 ft at 5:15AM May 24, 2022Observed: 9.35 ft at 5:30AM May 24, 2022Observed: 9.35 ft at 5:45AM May 24, 2022Observed: 9.35 ft at 6:00AM May 24, 2022Observed: 9.35 ft at 6:15AM May 24, 2022Observed: 9.35 ft at 6:30AM May 24, 2022Observed: 9.34 ft at 6:45AM May 24, 2022Observed: 9.34 ft at 7:00AM May 24, 2022Observed: 9.34 ft at 7:15AM May 24, 2022Observed: 9.34 ft at 7:30AM May 24, 2022Observed: 9.34 ft at 7:45AM May 24, 2022Observed: 9.33 ft at 8:00AM May 24, 2022Observed: 9.33 ft at 8:15AM May 24, 2022Observed: 9.32 ft at 8:30AM May 24, 2022Observed: 9.32 ft at 8:45AM May 24, 2022Observed: 9.32 ft at 9:00AM May 24, 2022Observed: 9.32 ft at 9:15AM May 24, 2022Observed: 9.32 ft at 9:30AM May 24, 2022Observed: 9.31 ft at 9:45AM May 24, 2022Observed: 9.31 ft at 10:00AM May 24, 2022Observed: 9.31 ft at 10:15AM May 24, 2022Observed: 9.31 ft at 10:30AM May 24, 2022Observed: 9.31 ft at 10:45AM May 24, 2022Observed: 9.31 ft at 11:00AM May 24, 2022Observed: 9.31 ft at 11:15AM May 24, 2022Observed: 9.3 ft at 11:30AM May 24, 2022Observed: 9.3 ft at 11:45AM May 24, 2022Observed: 9.3 ft at 12:00PM May 24, 2022Observed: 9.3 ft at 12:15PM May 24, 2022Observed: 9.3 ft at 12:30PM May 24, 2022Observed: 9.3 ft at 12:45PM May 24, 2022Observed: 9.29 ft at 1:00PM May 24, 2022Observed: 9.29 ft at 1:15PM May 24, 2022Observed: 9.29 ft at 1:30PM May 24, 2022Observed: 9.29 ft at 1:45PM May 24, 2022Observed: 9.29 ft at 2:00PM May 24, 2022Observed: 9.29 ft at 2:15PM May 24, 2022Observed: 9.29 ft at 2:30PM May 24, 2022Observed: 9.28 ft at 2:45PM May 24, 2022Observed: 9.28 ft at 3:00PM May 24, 2022Observed: 9.28 ft at 3:15PM May 24, 2022Observed: 9.28 ft at 3:30PM May 24, 2022Observed: 9.27 ft at 3:45PM May 24, 2022Observed: 9.28 ft at 4:00PM May 24, 2022Observed: 9.27 ft at 4:15PM May 24, 2022Observed: 9.27 ft at 4:30PM May 24, 2022Observed: 9.27 ft at 4:45PM May 24, 2022Observed: 9.27 ft at 5:00PM May 24, 2022Observed: 9.27 ft at 5:15PM May 24, 2022Observed: 9.26 ft at 5:30PM May 24, 2022Observed: 9.26 ft at 5:45PM May 24, 2022Observed: 9.26 ft at 6:00PM May 24, 2022Observed: 9.26 ft at 6:15PM May 24, 2022Observed: 9.26 ft at 6:30PM May 24, 2022Observed: 9.25 ft at 6:45PM May 24, 2022Observed: 9.25 ft at 6:47PM May 24, 2022Observed: 9.26 ft at 7:00PM May 24, 2022Observed: 9.25 ft at 7:15PM May 24, 2022Observed: 9.25 ft at 7:30PM May 24, 2022Observed: 9.25 ft at 7:45PM May 24, 2022Observed: 9.25 ft at 8:00PM May 24, 2022Observed: 9.24 ft at 8:15PM May 24, 2022Observed: 9.24 ft at 8:30PM May 24, 2022Observed: 9.24 ft at 8:45PM May 24, 2022Observed: 9.24 ft at 9:00PM May 24, 2022Observed: 9.24 ft at 9:15PM May 24, 2022Observed: 9.24 ft at 9:30PM May 24, 2022Observed: 9.24 ft at 9:45PM May 24, 2022Observed: 9.24 ft at 10:00PM May 24, 2022Observed: 9.23 ft at 10:15PM May 24, 2022Observed: 9.23 ft at 10:30PM May 24, 2022Observed: 9.23 ft at 10:45PM May 24, 2022Observed: 9.23 ft at 11:00PM May 24, 2022Observed: 9.23 ft at 11:15PM May 24, 2022Observed: 9.23 ft at 11:30PM May 24, 2022Observed: 9.22 ft at 11:45PM May 24, 2022Observed: 9.22 ft at 12:00AM May 25, 2022Observed: 9.22 ft at 12:15AM May 25, 2022Observed: 9.22 ft at 12:30AM May 25, 2022Observed: 9.22 ft at 12:45AM May 25, 2022Observed: 9.22 ft at 1:00AM May 25, 2022Observed: 9.21 ft at 1:15AM May 25, 2022Observed: 9.21 ft at 1:30AM May 25, 2022Observed: 9.21 ft at 1:45AM May 25, 2022Observed: 9.21 ft at 2:00AM May 25, 2022Observed: 9.21 ft at 2:15AM May 25, 2022Observed: 9.21 ft at 2:30AM May 25, 2022Observed: 9.21 ft at 2:45AM May 25, 2022Observed: 9.21 ft at 3:00AM May 25, 2022Observed: 9.2 ft at 3:15AM May 25, 2022Observed: 9.2 ft at 3:30AM May 25, 2022Observed: 9.2 ft at 3:45AM May 25, 2022Observed: 9.2 ft at 4:00AM May 25, 2022Observed: 9.2 ft at 4:15AM May 25, 2022Observed: 9.2 ft at 4:30AM May 25, 2022Observed: 9.2 ft at 4:45AM May 25, 2022Observed: 9.2 ft at 5:00AM May 25, 2022Observed: 9.19 ft at 5:15AM May 25, 2022Observed: 9.19 ft at 5:30AM May 25, 2022Observed: 9.19 ft at 5:45AM May 25, 2022Observed: 9.19 ft at 6:00AM May 25, 2022Observed: 9.19 ft at 6:15AM May 25, 2022Observed: 9.19 ft at 6:30AM May 25, 2022Observed: 9.19 ft at 6:45AM May 25, 2022Observed: 9.19 ft at 6:47AM May 25, 2022Observed: 9.19 ft at 7:00AM May 25, 2022Observed: 9.18 ft at 7:15AM May 25, 2022Observed: 9.18 ft at 7:30AM May 25, 2022Observed: 9.18 ft at 7:45AM May 25, 2022Observed: 9.18 ft at 8:00AM May 25, 2022Observed: 9.18 ft at 8:15AM May 25, 2022Observed: 9.18 ft at 8:30AM May 25, 2022Observed: 9.18 ft at 8:45AM May 25, 2022Observed: 9.18 ft at 9:00AM May 25, 2022Observed: 9.18 ft at 9:15AM May 25, 2022Observed: 9.18 ft at 9:30AM May 25, 2022Observed: 9.18 ft at 9:45AM May 25, 2022Observed: 9.18 ft at 10:00AM May 25, 2022Observed: 9.18 ft at 10:15AM May 25, 2022Observed: 9.18 ft at 10:30AM May 25, 2022Observed: 9.17 ft at 10:45AM May 25, 2022Observed: 9.17 ft at 11:00AM May 25, 2022Observed: 9.17 ft at 11:15AM May 25, 2022Observed: 9.17 ft at 11:30AM May 25, 2022Observed: 9.17 ft at 11:45AM May 25, 2022Observed: 9.17 ft at 12:00PM May 25, 2022Observed: 9.17 ft at 12:15PM May 25, 2022Observed: 9.17 ft at 12:30PM May 25, 2022Observed: 9.17 ft at 12:45PM May 25, 2022Observed: 9.16 ft at 1:00PM May 25, 2022Observed: 9.16 ft at 1:15PM May 25, 2022Observed: 9.16 ft at 1:30PM May 25, 2022Observed: 9.16 ft at 1:45PM May 25, 2022Observed: 9.16 ft at 2:00PM May 25, 2022Observed: 9.16 ft at 2:15PM May 25, 2022Observed: 9.16 ft at 2:30PM May 25, 2022Observed: 9.16 ft at 2:45PM May 25, 2022Observed: 9.16 ft at 3:00PM May 25, 2022Observed: 9.16 ft at 3:15PM May 25, 2022Observed: 9.16 ft at 3:30PM May 25, 2022Observed: 9.15 ft at 3:45PM May 25, 2022Observed: 9.16 ft at 4:00PM May 25, 2022Observed: 9.15 ft at 4:15PM May 25, 2022Observed: 9.16 ft at 4:30PM May 25, 2022Observed: 9.15 ft at 4:45PM May 25, 2022Observed: 9.15 ft at 5:00PM May 25, 2022Observed: 9.15 ft at 5:15PM May 25, 2022Observed: 9.16 ft at 5:30PM May 25, 2022Observed: 9.16 ft at 5:45PM May 25, 2022Observed: 9.18 ft at 6:00PM May 25, 2022Observed: 9.2 ft at 6:15PM May 25, 2022Observed: 9.23 ft at 6:30PM May 25, 2022Observed: 9.27 ft at 6:45PM May 25, 2022Observed: 9.27 ft at 6:46PM May 25, 2022Observed: 9.31 ft at 7:00PM May 25, 2022Observed: 9.34 ft at 7:15PM May 25, 2022Observed: 9.37 ft at 7:30PM May 25, 2022Observed: 9.39 ft at 7:45PM May 25, 2022Observed: 9.4 ft at 8:00PM May 25, 2022Observed: 9.42 ft at 8:15PM May 25, 2022Observed: 9.42 ft at 8:30PM May 25, 2022Observed: 9.43 ft at 8:45PM May 25, 2022Observed: 9.43 ft at 9:00PM May 25, 2022Observed: 9.43 ft at 9:15PM May 25, 2022Observed: 9.43 ft at 9:30PM May 25, 2022Observed: 9.44 ft at 9:45PM May 25, 2022Observed: 9.44 ft at 10:00PM May 25, 2022Observed: 9.44 ft at 10:15PM May 25, 2022Observed: 9.44 ft at 10:30PM May 25, 2022Observed: 9.44 ft at 10:45PM May 25, 2022Observed: 9.44 ft at 11:00PM May 25, 2022Observed: 9.44 ft at 11:15PM May 25, 2022Observed: 9.44 ft at 11:30PM May 25, 2022Observed: 9.44 ft at 11:45PM May 25, 2022Observed: 9.44 ft at 12:00AM May 26, 2022Observed: 9.44 ft at 12:15AM May 26, 2022Observed: 9.44 ft at 12:30AM May 26, 2022Observed: 9.44 ft at 12:45AM May 26, 2022Observed: 9.43 ft at 1:00AM May 26, 2022Observed: 9.44 ft at 1:15AM May 26, 2022Observed: 9.43 ft at 1:30AM May 26, 2022Observed: 9.43 ft at 1:45AM May 26, 2022Observed: 9.43 ft at 2:00AM May 26, 2022Observed: 9.42 ft at 2:15AM May 26, 2022Observed: 9.4 ft at 2:30AM May 26, 2022Observed: 9.39 ft at 2:45AM May 26, 2022Observed: 9.38 ft at 3:00AM May 26, 2022Observed: 9.37 ft at 3:15AM May 26, 2022Observed: 9.36 ft at 3:30AM May 26, 2022Observed: 9.34 ft at 3:45AM May 26, 2022Observed: 9.33 ft at 4:00AM May 26, 2022Observed: 9.32 ft at 4:15AM May 26, 2022Observed: 9.31 ft at 4:30AM May 26, 2022Observed: 9.29 ft at 4:45AM May 26, 2022Observed: 9.28 ft at 5:00AM May 26, 2022Observed: 9.28 ft at 5:15AM May 26, 2022Observed: 9.27 ft at 5:30AM May 26, 2022Observed: 9.27 ft at 5:45AM May 26, 2022Observed: 9.26 ft at 6:00AM May 26, 2022Observed: 9.26 ft at 6:15AM May 26, 2022Observed: 9.26 ft at 6:30AM May 26, 2022Observed: 9.26 ft at 6:45AM May 26, 2022Observed: 9.26 ft at 6:46AM May 26, 2022Observed: 9.26 ft at 7:00AM May 26, 2022Observed: 9.25 ft at 7:15AM May 26, 2022Observed: 9.26 ft at 7:30AM May 26, 2022Observed: 9.25 ft at 7:45AM May 26, 2022Observed: 9.25 ft at 8:00AM May 26, 2022Observed: 9.25 ft at 8:15AM May 26, 2022Observed: 9.25 ft at 8:30AM May 26, 2022Observed: 9.25 ft at 8:45AM May 26, 2022Observed: 9.25 ft at 9:00AM May 26, 2022Observed: 9.24 ft at 9:15AM May 26, 2022Observed: 9.24 ft at 9:30AM May 26, 2022Observed: 9.24 ft at 9:45AM May 26, 2022Observed: 9.24 ft at 10:00AM May 26, 2022Observed: 9.24 ft at 10:15AM May 26, 2022Observed: 9.23 ft at 10:30AM May 26, 2022Observed: 9.24 ft at 10:45AM May 26, 2022Observed: 9.23 ft at 11:00AM May 26, 2022Observed: 9.24 ft at 11:15AM May 26, 2022Observed: 9.23 ft at 11:30AM May 26, 2022Observed: 9.23 ft at 11:45AM May 26, 2022Observed: 9.24 ft at 12:00PM May 26, 2022Observed: 9.24 ft at 12:15PM May 26, 2022Observed: 9.23 ft at 12:30PM May 26, 2022Observed: 9.23 ft at 12:45PM May 26, 2022Observed: 9.23 ft at 1:00PM May 26, 2022Observed: 9.23 ft at 1:15PM May 26, 2022Observed: 9.23 ft at 1:30PM May 26, 2022Observed: 9.23 ft at 1:45PM May 26, 2022Observed: 9.23 ft at 2:00PM May 26, 2022Observed: 9.22 ft at 2:15PM May 26, 2022Observed: 9.23 ft at 2:30PM May 26, 2022Observed: 9.23 ft at 2:45PM May 26, 2022Observed: 9.23 ft at 3:00PM May 26, 2022Observed: 9.22 ft at 3:15PM May 26, 2022Observed: 9.23 ft at 3:30PM May 26, 2022Observed: 9.22 ft at 3:45PM May 26, 2022Observed: 9.23 ft at 4:00PM May 26, 2022Observed: 9.22 ft at 4:15PM May 26, 2022Observed: 9.22 ft at 4:30PM May 26, 2022Observed: 9.22 ft at 4:45PM May 26, 2022Observed: 9.22 ft at 5:00PM May 26, 2022Observed: 9.22 ft at 5:15PM May 26, 2022Observed: 9.21 ft at 5:30PM May 26, 2022Observed: 9.21 ft at 5:45PM May 26, 2022Observed: 9.21 ft at 6:00PM May 26, 2022Forecast: 9.1 ft 8:00PM May 26, 2022Forecast: 9.1 ft 2:00AM May 27, 2022Forecast: 9.1 ft 8:00AM May 27, 2022Forecast: 9.1 ft 2:00PM May 27, 2022Forecast: 9.2 ft 8:00PM May 27, 2022Highest Forecast: 9.3 ft 2:00AM May 28, 2022Highest Forecast: 9.3 ft 8:00AM May 28, 2022Highest Forecast: 9.3 ft 2:00PM May 28, 2022Highest Forecast: 9.3 ft 8:00PM May 28, 2022Forecast: 9.2 ft 2:00AM May 29, 2022Forecast: 9.1 ft 8:00AM May 29, 2022PRTN6(plotting HGIRG) Graph Created (6:46PM May 26, 2022)ObservedForecast (issued 10:42AM May 26)Latest observed value: 9.21 ft at 6:00 PM EDT 26-May-2022. Flood Stage is 19 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: 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
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
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
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.
17 Action stage, high flows. No flooding.
About This Location Collapse

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:
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
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