Portneuf River at Tyhee, ID
River level and flood forecast · Bannock County
The river is 1.4 ft below flood stage (6.23 ft).
Flow: 329 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 5 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 Portneuf River at Tyhee to flood, when it floods, and when it's over.
Flood stages
| Flood stage | 6.23 ft |
| Action stage | 5.83 ft |
| Record crest (May 6, 1986) | 6.76 ft |
What floods at each level
From the National Weather Service, highest first.
- 6.23 ftLowland field and crop flooding possible from US HWY 30 bridge near Simplot Plant to American Falls Reservoir.
- 5.83 ftNear bankfull from US HWY 30 bridge near Simplot Plant to American Falls Reservoir. Some ponding possible in low-lying areas.
Highest crests on record
- 6.76 ft — May 6, 1986
- 6.69 ft — September 3, 2013
- 6.44 ft — May 3, 2006
- 6.09 ft — May 30, 2011
- 6.05 ft — May 23, 2015
Recent crests: 3.93 ft (May 8, 2022) · 5.21 ft (October 15, 2021) · 4.91 ft (April 28, 2020) · 5.95 ft (April 26, 2019) · 6.01 ft (March 26, 2018)
Up and down the river, and nearby
- UpstreamPortneuf River at Pocatello, ID
- Spring Creek (Eastern ID) near Fort Hall, ID
- Snake River near Blackfoot (Tilden Bridge-Ft. Hall), ID
- Blackfoot River near Blackfoot (Butte Road-Ft. Hall), ID
- Portneuf River at Inkom, ID, ID
- Snake River at Blackfoot, ID
- Snake River at Neeley, ID
- Marsh Creek (Eastern ID) near McCammon, ID
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (PTYI1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.