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Hydrograph River at a Glance Download
Henrys Fork near Island Park Stage (ft)Flow (cfs)Highest Observation: 3.41 ft at 10:15AM May 02, 2024Observed: 3.4 ft at 10:30AM May 02, 2024Observed: 3.38 ft at 10:45AM May 02, 2024Observed: 3.39 ft at 11:00AM May 02, 2024Observed: 3.39 ft at 11:15AM May 02, 2024Observed: 3.39 ft at 11:30AM May 02, 2024Observed: 3.38 ft at 11:45AM May 02, 2024Observed: 3.38 ft at 12:00PM May 02, 2024Observed: 3.38 ft at 12:15PM May 02, 2024Observed: 3.39 ft at 12:30PM May 02, 2024Observed: 3.38 ft at 12:45PM May 02, 2024Observed: 3.38 ft at 1:00PM May 02, 2024Observed: 3.39 ft at 1:15PM May 02, 2024Observed: 3.37 ft at 1:30PM May 02, 2024Observed: 3.36 ft at 1:45PM May 02, 2024Observed: 3.37 ft at 2:00PM May 02, 2024Observed: 3.38 ft at 2:15PM May 02, 2024Observed: 3.39 ft at 2:30PM May 02, 2024Observed: 3.38 ft at 2:45PM May 02, 2024Observed: 3.37 ft at 3:00PM May 02, 2024Observed: 3.36 ft at 3:15PM May 02, 2024Observed: 3.36 ft at 3:30PM May 02, 2024Observed: 3.37 ft at 3:45PM May 02, 2024Observed: 3.37 ft at 4:00PM May 02, 2024Observed: 3.37 ft at 4:15PM May 02, 2024Observed: 3.36 ft at 4:30PM May 02, 2024Observed: 3.36 ft at 4:45PM May 02, 2024Observed: 3.36 ft at 5:00PM May 02, 2024Observed: 3.35 ft at 5:15PM May 02, 2024Observed: 3.36 ft at 5:30PM May 02, 2024Observed: 3.36 ft at 5:45PM May 02, 2024Observed: 3.36 ft at 6:00PM May 02, 2024Observed: 3.36 ft at 6:15PM May 02, 2024Observed: 3.35 ft at 6:30PM May 02, 2024Observed: 3.37 ft at 6:45PM May 02, 2024Observed: 3.37 ft at 7:00PM May 02, 2024Observed: 3.36 ft at 7:15PM May 02, 2024Observed: 3.35 ft at 7:30PM May 02, 2024Observed: 3.36 ft at 7:45PM May 02, 2024Observed: 3.34 ft at 8:00PM May 02, 2024Observed: 3.35 ft at 8:15PM May 02, 2024Observed: 3.36 ft at 8:30PM May 02, 2024Observed: 3.35 ft at 8:45PM May 02, 2024Observed: 3.36 ft at 9:00PM May 02, 2024Observed: 3.35 ft at 9:15PM May 02, 2024Observed: 3.36 ft at 9:30PM May 02, 2024Observed: 3.35 ft at 9:45PM May 02, 2024Observed: 3.37 ft at 10:00PM May 02, 2024Observed: 3.37 ft at 10:15PM May 02, 2024Observed: 3.36 ft at 10:30PM May 02, 2024Observed: 3.37 ft at 10:45PM May 02, 2024Observed: 3.35 ft at 11:00PM May 02, 2024Observed: 3.35 ft at 11:15PM May 02, 2024Observed: 3.34 ft at 11:30PM May 02, 2024Observed: 3.35 ft at 11:45PM May 02, 2024Observed: 3.35 ft at 12:00AM May 03, 2024Observed: 3.36 ft at 12:15AM May 03, 2024Observed: 3.35 ft at 12:30AM May 03, 2024Observed: 3.36 ft at 12:45AM May 03, 2024Observed: 3.36 ft at 1:00AM May 03, 2024Observed: 3.35 ft at 1:15AM May 03, 2024Observed: 3.36 ft at 1:30AM May 03, 2024Observed: 3.35 ft at 1:45AM May 03, 2024Observed: 3.35 ft at 2:00AM May 03, 2024Observed: 3.34 ft at 2:15AM May 03, 2024Observed: 3.36 ft at 2:30AM May 03, 2024Observed: 3.33 ft at 2:45AM May 03, 2024Observed: 3.36 ft at 3:00AM May 03, 2024Observed: 3.36 ft at 3:15AM May 03, 2024Observed: 3.35 ft at 3:30AM May 03, 2024Observed: 3.35 ft at 3:45AM May 03, 2024Observed: 3.34 ft at 4:00AM May 03, 2024Observed: 3.35 ft at 4:15AM May 03, 2024Observed: 3.35 ft at 4:30AM May 03, 2024Observed: 3.35 ft at 4:45AM May 03, 2024Observed: 3.35 ft at 5:00AM May 03, 2024Observed: 3.35 ft at 5:15AM May 03, 2024Observed: 3.35 ft at 5:30AM May 03, 2024Observed: 3.36 ft at 5:45AM May 03, 2024Observed: 3.37 ft at 6:00AM May 03, 2024Observed: 3.36 ft at 6:15AM May 03, 2024Observed: 3.35 ft at 6:30AM May 03, 2024Observed: 3.35 ft at 6:45AM May 03, 2024Observed: 3.37 ft at 7:00AM May 03, 2024Observed: 3.36 ft at 7:15AM May 03, 2024Observed: 3.36 ft at 7:30AM May 03, 2024Observed: 3.35 ft at 7:45AM May 03, 2024Observed: 3.36 ft at 8:00AM May 03, 2024Observed: 3.32 ft at 8:15AM May 03, 2024Observed: 3.31 ft at 8:30AM May 03, 2024Observed: 3.27 ft at 8:45AM May 03, 2024Observed: 3.23 ft at 9:00AM May 03, 2024Observed: 3.2 ft at 9:15AM May 03, 2024Observed: 3.16 ft at 9:30AM May 03, 2024Observed: 3.11 ft at 9:45AM May 03, 2024Observed: 3.13 ft at 10:00AM May 03, 2024Observed: 3.05 ft at 10:15AM May 03, 2024Observed: 3.05 ft at 10:30AM May 03, 2024Observed: 3.06 ft at 10:45AM May 03, 2024Observed: 3.05 ft at 11:00AM May 03, 2024Observed: 3.05 ft at 11:15AM May 03, 2024Observed: 3.04 ft at 11:30AM May 03, 2024Observed: 3.04 ft at 11:45AM May 03, 2024Observed: 3.06 ft at 12:00PM May 03, 2024Observed: 3.05 ft at 12:15PM May 03, 2024Observed: 3.05 ft at 12:30PM May 03, 2024Observed: 3.03 ft at 12:45PM May 03, 2024Observed: 3.03 ft at 1:00PM May 03, 2024Observed: 3.03 ft at 1:15PM May 03, 2024Observed: 3.03 ft at 1:30PM May 03, 2024Observed: 3.04 ft at 1:45PM May 03, 2024Observed: 3.03 ft at 2:00PM May 03, 2024Observed: 3.04 ft at 2:15PM May 03, 2024Observed: 3.02 ft at 2:30PM May 03, 2024Observed: 3.03 ft at 2:45PM May 03, 2024Observed: 3.02 ft at 3:00PM May 03, 2024Observed: 3.01 ft at 3:15PM May 03, 2024Observed: 3.01 ft at 3:30PM May 03, 2024Observed: 3.04 ft at 3:45PM May 03, 2024Observed: 3.05 ft at 4:00PM May 03, 2024Observed: 3.05 ft at 4:15PM May 03, 2024Observed: 3.05 ft at 4:30PM May 03, 2024Observed: 3.04 ft at 4:45PM May 03, 2024Observed: 3.04 ft at 5:00PM May 03, 2024Observed: 3.03 ft at 5:15PM May 03, 2024Observed: 3.03 ft at 5:30PM May 03, 2024Observed: 3.05 ft at 5:45PM May 03, 2024Observed: 3.04 ft at 6:00PM May 03, 2024Observed: 3.03 ft at 6:15PM May 03, 2024Observed: 3.03 ft at 6:30PM May 03, 2024Observed: 3.02 ft at 6:45PM May 03, 2024Observed: 3.01 ft at 7:00PM May 03, 2024Observed: 3.02 ft at 7:15PM May 03, 2024Observed: 3.02 ft at 7:30PM May 03, 2024Observed: 3.02 ft at 7:45PM May 03, 2024Observed: 3.01 ft at 8:00PM May 03, 2024Observed: 3.03 ft at 8:15PM May 03, 2024Observed: 3.04 ft at 8:30PM May 03, 2024Observed: 3.03 ft at 8:45PM May 03, 2024Observed: 3.06 ft at 9:00PM May 03, 2024Observed: 3.05 ft at 9:15PM May 03, 2024Observed: 3.06 ft at 9:30PM May 03, 2024Observed: 3.05 ft at 9:45PM May 03, 2024Observed: 3.05 ft at 10:00PM May 03, 2024Observed: 3.05 ft at 10:15PM May 03, 2024Observed: 3.06 ft at 10:30PM May 03, 2024Observed: 3.07 ft at 10:45PM May 03, 2024Observed: 3.06 ft at 11:00PM May 03, 2024Observed: 3.06 ft at 11:15PM May 03, 2024Observed: 3.06 ft at 11:30PM May 03, 2024Observed: 3.05 ft at 11:45PM May 03, 2024Observed: 3.06 ft at 12:00AM May 04, 2024Observed: 3.06 ft at 12:15AM May 04, 2024Observed: 3.06 ft at 12:30AM May 04, 2024Observed: 3.05 ft at 12:45AM May 04, 2024Observed: 3.05 ft at 1:00AM May 04, 2024Observed: 3.06 ft at 1:15AM May 04, 2024Observed: 3.05 ft at 1:30AM May 04, 2024Observed: 3.06 ft at 1:45AM May 04, 2024Observed: 3.05 ft at 2:00AM May 04, 2024Observed: 3.07 ft at 2:15AM May 04, 2024Observed: 3.06 ft at 2:30AM May 04, 2024Observed: 3.06 ft at 2:45AM May 04, 2024Observed: 3.05 ft at 3:00AM May 04, 2024Observed: 3.05 ft at 3:15AM May 04, 2024Observed: 3.05 ft at 3:30AM May 04, 2024Observed: 3.05 ft at 3:45AM May 04, 2024Observed: 3.06 ft at 4:00AM May 04, 2024Observed: 3.05 ft at 4:15AM May 04, 2024Observed: 3.05 ft at 4:30AM May 04, 2024Observed: 3.05 ft at 4:45AM May 04, 2024Observed: 3.04 ft at 5:00AM May 04, 2024Observed: 3.06 ft at 5:15AM May 04, 2024Observed: 3.05 ft at 5:30AM May 04, 2024Observed: 3.05 ft at 5:45AM May 04, 2024Observed: 3.04 ft at 6:00AM May 04, 2024Observed: 3.06 ft at 6:15AM May 04, 2024Observed: 3.05 ft at 6:30AM May 04, 2024Observed: 3.05 ft at 6:45AM May 04, 2024Observed: 3.04 ft at 7:00AM May 04, 2024Observed: 3.05 ft at 7:15AM May 04, 2024Observed: 3.06 ft at 7:30AM May 04, 2024Observed: 3.06 ft at 7:45AM May 04, 2024Observed: 3.07 ft at 8:00AM May 04, 2024Observed: 3.05 ft at 8:15AM May 04, 2024Observed: 3.07 ft at 8:30AM May 04, 2024Observed: 3.07 ft at 8:45AM May 04, 2024Observed: 3.07 ft at 9:00AM May 04, 2024Observed: 3.07 ft at 9:15AM May 04, 2024Observed: 3.06 ft at 9:30AM May 04, 2024Observed: 3.06 ft at 9:45AM May 04, 2024Observed: 3.06 ft at 10:00AM May 04, 2024Observed: 3.07 ft at 10:15AM May 04, 2024Observed: 3.07 ft at 10:30AM May 04, 2024Observed: 3.06 ft at 10:45AM May 04, 2024Observed: 3.07 ft at 11:00AM May 04, 2024Observed: 3.06 ft at 11:15AM May 04, 2024Observed: 3.06 ft at 11:30AM May 04, 2024Observed: 3.05 ft at 11:45AM May 04, 2024Observed: 3.06 ft at 12:00PM May 04, 2024Observed: 3.05 ft at 12:15PM May 04, 2024Observed: 3.03 ft at 12:30PM May 04, 2024Observed: 3.04 ft at 12:45PM May 04, 2024Observed: 3.03 ft at 1:00PM May 04, 2024Observed: 3.04 ft at 1:15PM May 04, 2024Observed: 3.04 ft at 1:30PM May 04, 2024Observed: 3.04 ft at 1:45PM May 04, 2024Observed: 3.04 ft at 2:00PM May 04, 2024Observed: 3.04 ft at 2:15PM May 04, 2024Observed: 3.03 ft at 2:30PM May 04, 2024Observed: 3.03 ft at 2:45PM May 04, 2024Observed: 3.04 ft at 3:00PM May 04, 2024Observed: 3.02 ft at 3:15PM May 04, 2024Observed: 3.02 ft at 3:30PM May 04, 2024Observed: 3.03 ft at 3:45PM May 04, 2024Observed: 3.03 ft at 4:00PM May 04, 2024Observed: 3.03 ft at 4:15PM May 04, 2024Observed: 3.03 ft at 4:30PM May 04, 2024Observed: 3.02 ft at 4:45PM May 04, 2024Observed: 3.03 ft at 5:00PM May 04, 2024Observed: 3.03 ft at 5:15PM May 04, 2024Observed: 3.02 ft at 5:30PM May 04, 2024Observed: 3.01 ft at 5:45PM May 04, 2024Observed: 3 ft at 6:00PM May 04, 2024Observed: 3.01 ft at 6:15PM May 04, 2024Observed: 3.03 ft at 6:30PM May 04, 2024Observed: 3.01 ft at 6:45PM May 04, 2024Observed: 3.01 ft at 7:00PM May 04, 2024Observed: 3.01 ft at 7:15PM May 04, 2024Observed: 3.01 ft at 7:30PM May 04, 2024Observed: 3.01 ft at 7:45PM May 04, 2024Observed: 3.01 ft at 8:00PM May 04, 2024Observed: 3.01 ft at 8:15PM May 04, 2024Observed: 3.02 ft at 8:30PM May 04, 2024Observed: 3.01 ft at 8:45PM May 04, 2024Observed: 3.02 ft at 9:00PM May 04, 2024Observed: 3.02 ft at 9:15PM May 04, 2024Observed: 3.02 ft at 9:30PM May 04, 2024Observed: 3.02 ft at 9:45PM May 04, 2024Observed: 3.02 ft at 10:00PM May 04, 2024Observed: 3.01 ft at 10:15PM May 04, 2024Observed: 3.02 ft at 10:30PM May 04, 2024Observed: 3.02 ft at 10:45PM May 04, 2024Observed: 3.02 ft at 11:00PM May 04, 2024Observed: 3.01 ft at 11:15PM May 04, 2024Observed: 3.03 ft at 11:30PM May 04, 2024Observed: 3.01 ft at 11:45PM May 04, 2024Observed: 3.02 ft at 12:00AM May 05, 2024Observed: 3.02 ft at 12:15AM May 05, 2024Observed: 3.01 ft at 12:30AM May 05, 2024Observed: 3.02 ft at 12:45AM May 05, 2024Observed: 3.03 ft at 1:00AM May 05, 2024Observed: 3.01 ft at 1:15AM May 05, 2024Observed: 3.01 ft at 1:30AM May 05, 2024Observed: 3.01 ft at 1:45AM May 05, 2024Observed: 3.02 ft at 2:00AM May 05, 2024Observed: 3.03 ft at 2:15AM May 05, 2024Observed: 3.01 ft at 2:30AM May 05, 2024Observed: 3.02 ft at 2:45AM May 05, 2024Observed: 3.03 ft at 3:00AM May 05, 2024Observed: 3.01 ft at 3:15AM May 05, 2024Observed: 3.02 ft at 3:30AM May 05, 2024Observed: 3.02 ft at 3:45AM May 05, 2024Observed: 3.02 ft at 4:00AM May 05, 2024Observed: 3.01 ft at 4:15AM May 05, 2024Observed: 3.02 ft at 4:30AM May 05, 2024Observed: 3.02 ft at 4:45AM May 05, 2024Observed: 3.02 ft at 5:00AM May 05, 2024Observed: 3.01 ft at 5:15AM May 05, 2024Observed: 3.01 ft at 5:30AM May 05, 2024Observed: 3.02 ft at 5:45AM May 05, 2024Observed: 3.03 ft at 6:00AM May 05, 2024Observed: 3.01 ft at 6:15AM May 05, 2024Observed: 3.01 ft at 6:30AM May 05, 2024Observed: 3.01 ft at 6:45AM May 05, 2024Observed: 3.01 ft at 7:00AM May 05, 2024Observed: 3.03 ft at 7:15AM May 05, 2024Observed: 3.03 ft at 7:30AM May 05, 2024Observed: 3.03 ft at 7:45AM May 05, 2024Observed: 3.01 ft at 8:00AM May 05, 2024Observed: 3.02 ft at 8:15AM May 05, 2024Observed: 3.03 ft at 8:30AM May 05, 2024Observed: 3.02 ft at 8:45AM May 05, 2024Highest Forecast: 3.02 ft 12:00PM May 05, 2024Highest Forecast: 3.02 ft 6:00PM May 05, 2024Highest Forecast: 3.02 ft 12:00AM May 06, 2024Highest Forecast: 3.02 ft 6:00AM May 06, 2024Highest Forecast: 3.02 ft 12:00PM May 06, 2024Highest Forecast: 3.02 ft 6:00PM May 06, 2024Highest Forecast: 3.02 ft 12:00AM May 07, 2024Highest Forecast: 3.02 ft 6:00AM May 07, 2024Highest Forecast: 3.02 ft 12:00PM May 07, 2024Highest Forecast: 3.02 ft 6:00PM May 07, 2024Highest Forecast: 3.02 ft 12:00AM May 08, 2024Highest Forecast: 3.02 ft 6:00AM May 08, 2024Highest Forecast: 3.02 ft 12:00PM May 08, 2024Highest Forecast: 3.02 ft 6:00PM May 08, 2024Highest Forecast: 3.02 ft 12:00AM May 09, 2024Highest Forecast: 3.02 ft 6:00AM May 09, 2024Highest Forecast: 3.02 ft 12:00PM May 09, 2024Highest Forecast: 3.02 ft 6:00PM May 09, 2024Highest Forecast: 3.02 ft 12:00AM May 10, 2024Highest Forecast: 3.02 ft 6:00AM May 10, 2024Highest Forecast: 3.02 ft 12:00PM May 10, 2024Highest Forecast: 3.02 ft 6:00PM May 10, 2024Highest Forecast: 3.02 ft 12:00AM May 11, 2024Highest Forecast: 3.02 ft 6:00AM May 11, 2024Highest Forecast: 3.02 ft 12:00PM May 11, 2024Highest Forecast: 3.02 ft 6:00PM May 11, 2024Highest Forecast: 3.02 ft 12:00AM May 12, 2024Highest Forecast: 3.02 ft 6:00AM May 12, 2024USGS--Water Resources of the United StatesISLI1(plotting HGIRG) Graph Created (10:03AM May 5, 2024)ObservedForecast (issued 9:23AM May 5)Latest observed value: 3.02 ft at 8:45 AM MDT 5-May-2024.
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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.
Return to Area Map
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) 4.66 ft on 07/06/2022
(2) 4.78 ft on 07/08/2021
(3) 5.02 ft on 05/01/2020
(4) 5.18 ft on 05/01/2019
(5) 5.00 ft on 04/25/2018
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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