Snake River near Heise, ID
River level and flood forecast · Bonneville County
The river is 4.9 ft below flood stage (8 ft).
Forecast to hold near 3.1 ft through Mon, Oct 19, 6 PM.
Flow: 4,090 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 1:08 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Snake River near Heise to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 11 ft |
| Moderate flood stage | 9.5 ft |
| Flood stage | 8 ft |
| Action stage | 6.25 ft |
| Record crest (June 13, 1997) | 11.26 ft |
What floods at each level
From the National Weather Service, highest first.
- 11 ftMajor flooding in Menan-Roberts area. Interstate 15 may be closed due to flooding. County road bridges will begin to wash out.
- 9.5 ftFlooding can be expected in the Menan-Roberts area.
- 8 ftFlooding near the Warm Springs Resort area is possible.
- 6.25 ftAction 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.
Highest crests on record
- 11.26 ft — June 13, 1997
- 10.04 ft — June 23, 1943
- 9.22 ft — June 1, 1956
- 9.11 ft — May 29, 1951
- 9.07 ft — June 28, 1954
Recent crests: 5.98 ft (July 11, 2022) · 6.62 ft (July 27, 2021) · 7.62 ft (June 5, 2020) · 6.76 ft (April 24, 2019) · 7.66 ft (June 19, 2018)
Up and down the river, and nearby
- UpstreamSnake River near Irwin, ID
- DownstreamSnake River at Lorenzo, ID
- Willow Creek (Eastern ID) below Ririe Dam near Ririe, ID
- Willow Creek (Eastern ID) below Tex Creek, ID
- South Fork Teton River near Rexburg, ID
- Snake River near Menan, ID
- Henrys Fork near Rexburg, ID
- North Fork Teton River near Sugar City, ID
- Snake River near Idaho Falls, ID
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HEII1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.