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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Snake River near Heise are issued routinely year-round.
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Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 11
Moderate Flood Stage: 9.5
Flood Stage: 8
Action Stage: 6.25
Low Stage (in feet): -9999

Historic Crests
(1) 11.26 ft on 06/13/1997
(2) 10.04 ft on 06/23/1943
(3) 9.22 ft on 06/01/1956
(4) 9.11 ft on 05/29/1951
(5) 9.07 ft on 06/28/1954
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.98 ft on 07/11/2022
(2) 6.62 ft on 07/27/2021
(3) 7.62 ft on 06/05/2020
(4) 6.76 ft on 04/24/2019
(5) 7.66 ft on 06/19/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.18 ft on 11/10/1956
(2) 0.75 ft on 03/14/1977
(3) 0.86 ft on 03/01/1968
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
11 Major flooding in Menan-Roberts area. Interstate 15 may be closed due to flooding. County road bridges will begin to wash out.
9.5 Flooding can be expected in the Menan-Roberts area.
8 Flooding near the Warm Springs Resort area is possible.
6.25 Action Stage 6.25 ft. Actual flooding is limited to islands and bars and levees on both banks of the Snake River, between the US HWY 20 bridge and the Heise area. Channel changes, including flows into high water channels, may impinge upon levees in the reach and threaten their structural integrity, leading to a breach and possible flooding outside of the levee system. Actions by local agencies may include responding to potential breaches and conducting emergency repairs.
(1) HEII1_googleearth
(2) HEII1_map
(3) HEII1_SnakeHeise_gage
(4) HEII1_looking_upstream
(5) HEII1_looking_downstream
(6) HEII1_looking_downstream2

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 41000 CFS or 11.15 ft
50   Year Peak Flood 46500 CFS or 12.11 ft
100 Year Peak Flood 52200 CFS or 13.00 ft
200 Year Peak Flood 58400 CFS
500 Year Peak Flood 67100 CFS
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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