River stage
Heise, Snake River
- River level
- 3.07 ft
- Status
- Below flood stage
- 7-day change
- -0.17 ft
- Recent high
- 6.38 ft
- Recent low
- 3.07 ft
Last reported 2026-10-13 | NWS HEII1
- 30-day change
- -0.91 ft
- Average
- 5.04 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 11.26 ft
In brief
The Snake River at Heise, ID read 3.07 ft on Oct 13, 2026, 3.18 ft below action stage. That is 0.91 ft lower than 30 days earlier.
Source: National Weather Service gauge HEII1
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 11.26 ft | 1997-06-13 |
| 2 | 10.04 ft | 1943-06-23 |
| 3 | 9.22 ft | 1956-06-01 |
| 4 | 9.11 ft | 1951-05-29 |
| 5 | 9.07 ft | 1954-06-28 |
| 6 | 8.80 ft | 1936-05-16 |
| 7 | 8.40 ft | 1974-06-26 |
| 8 | 8.36 ft | 2017-06-14 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 6.25 ft
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.
- 8.00 ft
Flooding near the Warm Springs Resort area is possible.
- 9.50 ft
Flooding can be expected in the Menan-Roberts area.
- 11.00 ft
Major flooding in Menan-Roberts area. Interstate 15 may be closed due to flooding. County road bridges will begin to wash out.
Written by the local National Weather Service forecast office for this exact gauge.
Trout stocking on the Snake River
IDFG stocked the Snake River 20 times in 2026, 71,020 fish in total. Rainbow Trout and Rainbow Trout - Triploid and White Sturgeon at Catchable (6+ inches) and Fry (0-3 inches). IDFG's published figures for 2026, the most recent season it has confirmed, record 70,893 trout actually released here across 20 visits.
| Species | Fish | When |
|---|---|---|
| Rainbow Trout | 3,000 | March 2026 |
| Rainbow Trout | 600 | April 2026 |
| Rainbow Trout | 600 | April 2026 |
| Rainbow Trout | 600 | April 2026 |
| Rainbow Trout | 600 | April 2026 |
| Rainbow Trout - Triploid | 49,728 | April 2026 |
| Rainbow Trout | 600 | May 2026 |
| Rainbow Trout | 600 | May 2026 |
| Rainbow Trout | 600 | May 2026 |
| Rainbow Trout | 600 | May 2026 |
| Rainbow Trout - Triploid | 3,000 | June 2026 |
| White Sturgeon | 64 | June 2026 |
| White Sturgeon | 63 | June 2026 |
| Rainbow Trout - Triploid | 3,000 | July 2026 |
| Rainbow Trout - Triploid | 600 | August 2026 |
| Rainbow Trout - Triploid | 600 | August 2026 |
| Rainbow Trout - Triploid | 600 | August 2026 |
| Rainbow Trout - Triploid | 600 | August 2026 |
| Rainbow Trout - Triploid | 3,000 | September 2026 |
| Rainbow Trout - Triploid | 1,965 | October 2026 |
IDFG lists a week or a month rather than a date, and counts fish as an estimate. Full Idaho stocking schedule →
Frequently asked questions
Is the Snake River flooding at Heise?
No. The Snake River at Heise is at 3.07 ft, 3.18 ft below action stage.
What is the flood stage at Heise?
The National Weather Service sets action stage 6.25 ft, minor flooding 8 ft, moderate flooding 9.5 ft and major flooding 11 ft.
What is the highest the Snake River has been at Heise?
The highest crest on record is 11.26 ft, on 1997-06-13.
Is the Snake River high or low right now at Heise?
At 3.07 ft it is higher than 0% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge HEII1); daily history from the U.S. Geological Survey (site 13037500). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.