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Hydrograph River at a Glance Download
Henrys Fork near Island Park Stage (ft)Flow (cfs)Observed: 2.59 ft at 10:30PM May 14, 2022Observed: 2.58 ft at 10:45PM May 14, 2022Observed: 2.58 ft at 11:00PM May 14, 2022Observed: 2.58 ft at 11:15PM May 14, 2022Observed: 2.57 ft at 11:30PM May 14, 2022Observed: 2.58 ft at 11:45PM May 14, 2022Observed: 2.58 ft at 12:00AM May 15, 2022Observed: 2.57 ft at 12:15AM May 15, 2022Observed: 2.58 ft at 12:30AM May 15, 2022Observed: 2.58 ft at 12:45AM May 15, 2022Observed: 2.57 ft at 1:00AM May 15, 2022Observed: 2.56 ft at 1:15AM May 15, 2022Observed: 2.56 ft at 1:30AM May 15, 2022Observed: 2.56 ft at 1:45AM May 15, 2022Observed: 2.57 ft at 2:00AM May 15, 2022Observed: 2.57 ft at 2:15AM May 15, 2022Observed: 2.58 ft at 2:30AM May 15, 2022Observed: 2.59 ft at 2:45AM May 15, 2022Observed: 2.58 ft at 3:00AM May 15, 2022Observed: 2.58 ft at 3:15AM May 15, 2022Observed: 2.57 ft at 3:30AM May 15, 2022Observed: 2.56 ft at 3:45AM May 15, 2022Observed: 2.57 ft at 4:00AM May 15, 2022Observed: 2.58 ft at 4:15AM May 15, 2022Observed: 2.6 ft at 4:30AM May 15, 2022Observed: 2.57 ft at 4:45AM May 15, 2022Observed: 2.59 ft at 5:00AM May 15, 2022Observed: 2.59 ft at 5:15AM May 15, 2022Observed: 2.58 ft at 5:30AM May 15, 2022Observed: 2.58 ft at 5:45AM May 15, 2022Observed: 2.57 ft at 6:00AM May 15, 2022Observed: 2.58 ft at 6:15AM May 15, 2022Observed: 2.58 ft at 6:30AM May 15, 2022Observed: 2.57 ft at 6:45AM May 15, 2022Observed: 2.58 ft at 7:00AM May 15, 2022Observed: 2.59 ft at 7:15AM May 15, 2022Observed: 2.57 ft at 7:30AM May 15, 2022Observed: 2.59 ft at 7:45AM May 15, 2022Observed: 2.6 ft at 8:00AM May 15, 2022Observed: 2.6 ft at 8:15AM May 15, 2022Observed: 2.59 ft at 8:30AM May 15, 2022Observed: 2.6 ft at 8:45AM May 15, 2022Observed: 2.61 ft at 9:00AM May 15, 2022Observed: 2.61 ft at 9:15AM May 15, 2022Highest Observation: 2.62 ft at 9:30AM May 15, 2022Observed: 2.59 ft at 9:45AM May 15, 2022Observed: 2.59 ft at 10:00AM May 15, 2022Observed: 2.6 ft at 10:15AM May 15, 2022Observed: 2.6 ft at 10:30AM May 15, 2022Observed: 2.58 ft at 10:45AM May 15, 2022Observed: 2.59 ft at 11:00AM May 15, 2022Observed: 2.58 ft at 11:15AM May 15, 2022Observed: 2.57 ft at 11:30AM May 15, 2022Observed: 2.58 ft at 11:45AM May 15, 2022Observed: 2.58 ft at 12:00PM May 15, 2022Observed: 2.59 ft at 12:15PM May 15, 2022Observed: 2.57 ft at 12:30PM May 15, 2022Observed: 2.58 ft at 12:45PM May 15, 2022Observed: 2.58 ft at 1:00PM May 15, 2022Observed: 2.58 ft at 1:15PM May 15, 2022Observed: 2.58 ft at 1:30PM May 15, 2022Observed: 2.57 ft at 1:45PM May 15, 2022Observed: 2.58 ft at 2:00PM May 15, 2022Observed: 2.58 ft at 2:15PM May 15, 2022Observed: 2.57 ft at 2:30PM May 15, 2022Observed: 2.56 ft at 2:45PM May 15, 2022Observed: 2.56 ft at 3:00PM May 15, 2022Observed: 2.56 ft at 3:15PM May 15, 2022Observed: 2.57 ft at 3:30PM May 15, 2022Observed: 2.57 ft at 3:45PM May 15, 2022Observed: 2.56 ft at 4:00PM May 15, 2022Observed: 2.56 ft at 4:15PM May 15, 2022Observed: 2.55 ft at 4:30PM May 15, 2022Observed: 2.56 ft at 4:45PM May 15, 2022Observed: 2.56 ft at 5:00PM May 15, 2022Observed: 2.55 ft at 5:15PM May 15, 2022Observed: 2.54 ft at 5:30PM May 15, 2022Observed: 2.54 ft at 5:45PM May 15, 2022Observed: 2.55 ft at 6:00PM May 15, 2022Observed: 2.54 ft at 6:15PM May 15, 2022Observed: 2.55 ft at 6:30PM May 15, 2022Observed: 2.55 ft at 6:45PM May 15, 2022Observed: 2.53 ft at 7:00PM May 15, 2022Observed: 2.54 ft at 7:15PM May 15, 2022Observed: 2.53 ft at 7:30PM May 15, 2022Observed: 2.53 ft at 7:31PM May 15, 2022Observed: 2.53 ft at 7:45PM May 15, 2022Observed: 2.53 ft at 7:46PM May 15, 2022Observed: 2.54 ft at 8:00PM May 15, 2022Observed: 2.54 ft at 8:01PM May 15, 2022Observed: 2.53 ft at 8:15PM May 15, 2022Observed: 2.55 ft at 8:30PM May 15, 2022Observed: 2.54 ft at 8:45PM May 15, 2022Observed: 2.53 ft at 9:00PM May 15, 2022Observed: 2.52 ft at 9:15PM May 15, 2022Observed: 2.53 ft at 9:30PM May 15, 2022Observed: 2.52 ft at 9:45PM May 15, 2022Observed: 2.54 ft at 10:00PM May 15, 2022Observed: 2.53 ft at 10:15PM May 15, 2022Observed: 2.52 ft at 10:30PM May 15, 2022Observed: 2.54 ft at 10:45PM May 15, 2022Observed: 2.53 ft at 11:00PM May 15, 2022Observed: 2.53 ft at 11:15PM May 15, 2022Observed: 2.51 ft at 11:30PM May 15, 2022Observed: 2.52 ft at 11:45PM May 15, 2022Observed: 2.53 ft at 12:00AM May 16, 2022Observed: 2.51 ft at 12:15AM May 16, 2022Observed: 2.52 ft at 12:30AM May 16, 2022Observed: 2.52 ft at 12:45AM May 16, 2022Observed: 2.53 ft at 1:00AM May 16, 2022Observed: 2.51 ft at 1:15AM May 16, 2022Observed: 2.52 ft at 1:30AM May 16, 2022Observed: 2.51 ft at 1:45AM May 16, 2022Observed: 2.53 ft at 2:00AM May 16, 2022Observed: 2.54 ft at 2:15AM May 16, 2022Observed: 2.54 ft at 2:30AM May 16, 2022Observed: 2.53 ft at 2:45AM May 16, 2022Observed: 2.52 ft at 3:00AM May 16, 2022Observed: 2.53 ft at 3:15AM May 16, 2022Observed: 2.52 ft at 3:30AM May 16, 2022Observed: 2.53 ft at 3:45AM May 16, 2022Observed: 2.52 ft at 4:00AM May 16, 2022Observed: 2.52 ft at 4:15AM May 16, 2022Observed: 2.52 ft at 4:30AM May 16, 2022Observed: 2.53 ft at 4:45AM May 16, 2022Observed: 2.54 ft at 5:00AM May 16, 2022Observed: 2.53 ft at 5:15AM May 16, 2022Observed: 2.53 ft at 5:30AM May 16, 2022Observed: 2.55 ft at 5:45AM May 16, 2022Observed: 2.52 ft at 6:00AM May 16, 2022Observed: 2.52 ft at 6:15AM May 16, 2022Observed: 2.52 ft at 6:30AM May 16, 2022Observed: 2.54 ft at 6:45AM May 16, 2022Observed: 2.53 ft at 9:00AM May 16, 2022Observed: 2.52 ft at 9:15AM May 16, 2022Observed: 2.53 ft at 9:30AM May 16, 2022Observed: 2.54 ft at 9:45AM May 16, 2022Observed: 2.52 ft at 10:00AM May 16, 2022Observed: 2.53 ft at 10:15AM May 16, 2022Observed: 2.53 ft at 10:30AM May 16, 2022Observed: 2.54 ft at 10:45AM May 16, 2022Observed: 2.51 ft at 11:00AM May 16, 2022Observed: 2.54 ft at 11:15AM May 16, 2022Observed: 2.54 ft at 11:30AM May 16, 2022Observed: 2.54 ft at 11:45AM May 16, 2022Observed: 2.52 ft at 12:00PM May 16, 2022Observed: 2.52 ft at 12:15PM May 16, 2022Observed: 2.53 ft at 12:30PM May 16, 2022Observed: 2.52 ft at 12:45PM May 16, 2022Observed: 2.53 ft at 1:00PM May 16, 2022Observed: 2.52 ft at 1:15PM May 16, 2022Observed: 2.51 ft at 1:30PM May 16, 2022Observed: 2.52 ft at 1:45PM May 16, 2022Observed: 2.51 ft at 2:00PM May 16, 2022Observed: 2.51 ft at 2:15PM May 16, 2022Observed: 2.51 ft at 2:30PM May 16, 2022Observed: 2.51 ft at 2:45PM May 16, 2022Observed: 2.49 ft at 3:00PM May 16, 2022Observed: 2.5 ft at 3:15PM May 16, 2022Observed: 2.49 ft at 3:30PM May 16, 2022Observed: 2.5 ft at 3:45PM May 16, 2022Observed: 2.51 ft at 4:00PM May 16, 2022Observed: 2.52 ft at 4:15PM May 16, 2022Observed: 2.51 ft at 4:30PM May 16, 2022Observed: 2.52 ft at 4:45PM May 16, 2022Observed: 2.51 ft at 5:00PM May 16, 2022Observed: 2.51 ft at 5:15PM May 16, 2022Observed: 2.5 ft at 5:30PM May 16, 2022Observed: 2.51 ft at 5:45PM May 16, 2022Observed: 2.51 ft at 6:00PM May 16, 2022Observed: 2.51 ft at 6:15PM May 16, 2022Observed: 2.51 ft at 6:30PM May 16, 2022Observed: 2.5 ft at 6:45PM May 16, 2022Observed: 2.51 ft at 7:00PM May 16, 2022Observed: 2.5 ft at 7:15PM May 16, 2022Observed: 2.51 ft at 7:30PM May 16, 2022Observed: 2.51 ft at 7:31PM May 16, 2022Observed: 2.49 ft at 7:45PM May 16, 2022Observed: 2.49 ft at 7:46PM May 16, 2022Observed: 2.5 ft at 8:00PM May 16, 2022Observed: 2.5 ft at 8:01PM May 16, 2022Observed: 2.5 ft at 8:15PM May 16, 2022Observed: 2.5 ft at 8:30PM May 16, 2022Observed: 2.51 ft at 8:45PM May 16, 2022Observed: 2.5 ft at 9:00PM May 16, 2022Observed: 2.49 ft at 9:15PM May 16, 2022Observed: 2.49 ft at 9:30PM May 16, 2022Observed: 2.48 ft at 9:45PM May 16, 2022Observed: 2.5 ft at 10:00PM May 16, 2022Observed: 2.48 ft at 10:15PM May 16, 2022Observed: 2.49 ft at 10:30PM May 16, 2022Observed: 2.48 ft at 10:45PM May 16, 2022Observed: 2.49 ft at 11:00PM May 16, 2022Observed: 2.48 ft at 11:15PM May 16, 2022Observed: 2.48 ft at 11:30PM May 16, 2022Observed: 2.47 ft at 11:45PM May 16, 2022Observed: 2.48 ft at 12:00AM May 17, 2022Observed: 2.48 ft at 12:15AM May 17, 2022Observed: 2.49 ft at 12:30AM May 17, 2022Observed: 2.48 ft at 12:45AM May 17, 2022Observed: 2.49 ft at 1:00AM May 17, 2022Observed: 2.48 ft at 1:15AM May 17, 2022Observed: 2.49 ft at 1:30AM May 17, 2022Observed: 2.48 ft at 1:45AM May 17, 2022Observed: 2.47 ft at 2:00AM May 17, 2022Observed: 2.47 ft at 2:15AM May 17, 2022Observed: 2.48 ft at 2:30AM May 17, 2022Observed: 2.49 ft at 2:45AM May 17, 2022Observed: 2.48 ft at 3:00AM May 17, 2022Observed: 2.49 ft at 3:15AM May 17, 2022Observed: 2.47 ft at 3:30AM May 17, 2022Observed: 2.47 ft at 3:45AM May 17, 2022Observed: 2.48 ft at 4:00AM May 17, 2022Observed: 2.46 ft at 4:15AM May 17, 2022Observed: 2.47 ft at 4:30AM May 17, 2022Observed: 2.48 ft at 4:45AM May 17, 2022Observed: 2.47 ft at 5:00AM May 17, 2022Observed: 2.47 ft at 5:15AM May 17, 2022Observed: 2.47 ft at 5:30AM May 17, 2022Observed: 2.48 ft at 5:45AM May 17, 2022Observed: 2.48 ft at 6:00AM May 17, 2022Observed: 2.47 ft at 6:15AM May 17, 2022Observed: 2.47 ft at 6:30AM May 17, 2022Observed: 2.48 ft at 6:45AM May 17, 2022Observed: 2.48 ft at 7:00AM May 17, 2022Observed: 2.47 ft at 7:15AM May 17, 2022Observed: 2.47 ft at 7:30AM May 17, 2022Observed: 2.49 ft at 7:45AM May 17, 2022Observed: 2.5 ft at 8:00AM May 17, 2022Observed: 2.5 ft at 8:15AM May 17, 2022Observed: 2.5 ft at 8:30AM May 17, 2022Observed: 2.49 ft at 8:45AM May 17, 2022Observed: 2.51 ft at 9:00AM May 17, 2022Observed: 2.5 ft at 9:15AM May 17, 2022Observed: 2.49 ft at 9:30AM May 17, 2022Observed: 2.49 ft at 9:45AM May 17, 2022Observed: 2.49 ft at 10:00AM May 17, 2022Observed: 2.49 ft at 10:15AM May 17, 2022Observed: 2.5 ft at 10:30AM May 17, 2022Observed: 2.5 ft at 10:45AM May 17, 2022Observed: 2.5 ft at 11:00AM May 17, 2022Observed: 2.51 ft at 11:15AM May 17, 2022Observed: 2.51 ft at 11:30AM May 17, 2022Observed: 2.51 ft at 11:45AM May 17, 2022Observed: 2.51 ft at 12:00PM May 17, 2022Observed: 2.51 ft at 12:15PM May 17, 2022Observed: 2.51 ft at 12:30PM May 17, 2022Observed: 2.52 ft at 12:45PM May 17, 2022Observed: 2.52 ft at 1:00PM May 17, 2022Observed: 2.51 ft at 1:15PM May 17, 2022Observed: 2.5 ft at 1:30PM May 17, 2022Observed: 2.51 ft at 1:45PM May 17, 2022Observed: 2.5 ft at 2:00PM May 17, 2022Observed: 2.49 ft at 2:15PM May 17, 2022Observed: 2.5 ft at 2:30PM May 17, 2022Observed: 2.5 ft at 2:45PM May 17, 2022Observed: 2.51 ft at 3:00PM May 17, 2022Observed: 2.49 ft at 3:15PM May 17, 2022Observed: 2.49 ft at 3:30PM May 17, 2022Observed: 2.5 ft at 3:45PM May 17, 2022Observed: 2.5 ft at 4:00PM May 17, 2022Observed: 2.5 ft at 4:15PM May 17, 2022Observed: 2.5 ft at 4:30PM May 17, 2022Observed: 2.5 ft at 4:45PM May 17, 2022Observed: 2.48 ft at 5:00PM May 17, 2022Observed: 2.49 ft at 5:15PM May 17, 2022Observed: 2.49 ft at 5:30PM May 17, 2022Observed: 2.5 ft at 5:45PM May 17, 2022Observed: 2.49 ft at 6:00PM May 17, 2022Observed: 2.49 ft at 6:15PM May 17, 2022Observed: 2.48 ft at 6:30PM May 17, 2022Observed: 2.47 ft at 6:45PM May 17, 2022Observed: 2.46 ft at 7:00PM May 17, 2022Observed: 2.46 ft at 7:15PM May 17, 2022Observed: 2.47 ft at 7:30PM May 17, 2022Observed: 2.47 ft at 7:31PM May 17, 2022Observed: 2.47 ft at 7:45PM May 17, 2022Observed: 2.47 ft at 7:46PM May 17, 2022Observed: 2.48 ft at 8:00PM May 17, 2022Observed: 2.48 ft at 8:01PM May 17, 2022Observed: 2.47 ft at 8:15PM May 17, 2022Observed: 2.48 ft at 8:30PM May 17, 2022Observed: 2.48 ft at 8:45PM May 17, 2022Observed: 2.47 ft at 9:00PM May 17, 2022Observed: 2.47 ft at 9:15PM May 17, 2022Observed: 2.48 ft at 9:30PM May 17, 2022Observed: 2.47 ft at 9:45PM May 17, 2022Forecast: 2.5 ft 12:00AM May 18, 2022Forecast: 2.5 ft 6:00AM May 18, 2022Forecast: 2.5 ft 12:00PM May 18, 2022Forecast: 2.5 ft 6:00PM May 18, 2022Forecast: 2.5 ft 12:00AM May 19, 2022Forecast: 2.5 ft 6:00AM May 19, 2022Forecast: 2.5 ft 12:00PM May 19, 2022Forecast: 2.5 ft 6:00PM May 19, 2022Forecast: 2.5 ft 12:00AM May 20, 2022Forecast: 2.57 ft 6:00AM May 20, 2022Forecast: 2.65 ft 12:00PM May 20, 2022Forecast: 2.71 ft 6:00PM May 20, 2022Forecast: 2.78 ft 12:00AM May 21, 2022Forecast: 2.84 ft 6:00AM May 21, 2022Forecast: 2.9 ft 12:00PM May 21, 2022Forecast: 2.96 ft 6:00PM May 21, 2022Forecast: 3.01 ft 12:00AM May 22, 2022Forecast: 3.07 ft 6:00AM May 22, 2022Forecast: 3.12 ft 12:00PM May 22, 2022Forecast: 3.18 ft 6:00PM May 22, 2022Forecast: 3.23 ft 12:00AM May 23, 2022Forecast: 3.29 ft 6:00AM May 23, 2022Forecast: 3.38 ft 12:00PM May 23, 2022Forecast: 3.46 ft 6:00PM May 23, 2022Forecast: 3.45 ft 12:00AM May 24, 2022Forecast: 3.48 ft 6:00AM May 24, 2022Forecast: 3.53 ft 12:00PM May 24, 2022Highest Forecast: 3.57 ft 6:00PM May 24, 2022USGS--Water Resources of the United StatesISLI1(plotting HGIRG) Graph Created (10:18PM May 17, 2022)ObservedForecast (issued 4:22PM May 17)Latest observed value: 2.47 ft at 9:45 PM MDT 17-May-2022.
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Henrys Fork near Island Park are issued routinely year-round.
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Upstream Gauge - at Island Park Upstream Gauge Downstream Gauge Downstream Gauge - near Ashton
Flood Categories (in feet)
Not Available

Historic Crests
(1) 6.15 ft on 04/26/1946
(2) 6.06 ft on 05/23/1984
(3) 5.96 ft on 06/01/1943
(4) 5.87 ft on 07/18/1955
(5) 5.85 ft on 08/26/1983
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.19 ft on 05/01/2019
(2) 5.00 ft on 04/25/2018
(3) 5.14 ft on 07/24/2017
(4) 4.79 ft on 06/30/2016
(5) 5.80 ft on 07/21/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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.
About This Location Collapse

Latitude: 44.416389° N, Longitude: 111.395278° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available 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 6225 ft 6126 ft  

Current/Historical Observations:

Additional Information Collapse
Historical Peak Flows     (Scroll to Streamflow Statistics for more years)
USGS Historical Peak Flows Explanation
Gage Analysis 

25   Year Peak Flood 2660 CFS or 6.08 ft
50   Year Peak Flood 2800 CFS or 6.26 ft
100 Year Peak Flood 2920 CFS or 6.40 ft
200 Year Peak Flood 3040 CFS
500 Year Peak Flood 3180 CFS
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
Pocatello Weather Forecast Office
1945 Beechcraft Ave
Pocatello, ID 83204
(208) 232-9306
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Page last modified: 2-Nov-2020 7:28 PM
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