Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Navigation Bar End Cap


This probabilistic forecast is issued by the Northwest River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on

No images found

About this graph
Forecasts for the Henrys Fork near Rexburg are issued routinely year-round.
Return to Area Map

Upstream Locations Upstream Gauge
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 11.5
Flood Stage: 9.5
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 12.05 ft on 05/17/1984
(2) 11.87 ft on 06/09/2011
(3) 11.30 ft on 06/09/2010
(4) 11.26 ft on 05/18/1996
(5) 11.21 ft on 06/12/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 9.55 ft on 06/15/2022
(2) 7.80 ft on 05/24/2021
(3) 9.32 ft on 06/08/2020
(4) 9.66 ft on 05/19/2019
(5) 10.15 ft on 05/26/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1.45 ft on 03/24/1934
(2) 2.58 ft on 07/17/1988
(3) 2.70 ft on 07/29/1977
Show More Low Water Records
KML Image
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
13 Major and extensive flooding of farmland and pastureland near the river especially on the east bank will occur. Flooding/overtopping of access roads near the river will cut off local access. Water may start to back up on the upstream side of the Idaho State Highway 33 bridge (over the Henrys Fork) with large amounts of woody debris distributed throughout the reach. An irrigation water pump at Beaver Dick Park will be submerged and the USGS gagehouse will become affected.
11.5 Moderate flooding of farmland and pastureland near the river and side channels/sloughs will occur with impacts to farm outbuildings near W 2700 S. Some low lying secondary and access roads near the river will have water over them.
9.5 Minor flooding of farmland near the river will occur between the confluence of the Snake River and upstream to near St. Anthony. Lower Beaver Dick Park is under water and some picnic shelters are inaccessible. Portions of Warm Slough Access will be under water.
(1) REXI1_googleearth
(2) REXI1_terrain
(3) REXI1_map
(4) REXI1_lookingupstream
(5) REXI1_lookingdownstream
(6) REXI1_gagingsite
(7) REXI1_gagehouse

Other Real-time and/or Archive Data Sources:

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

25   Year Peak Flood 12300 CFS or 11.12 ft
50   Year Peak Flood 13800 CFS or 11.49 ft
100 Year Peak Flood 15200 CFS or 11.81 ft
200 Year Peak Flood 16700 CFS or 12.15 ft
500 Year Peak Flood 18700 CFS or 12.62 ft
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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:28 PM
Privacy Policy
About Us
Career Opportunities