Portneuf River at Pocatello, ID
River level and flood forecast · Bannock County
The river is 4.5 ft below flood stage (8.5 ft).
Forecast to fall to 3.5 ft by Mon, Oct 19, 6 PM.
Flow: 151 cubic feet per second (USGS).
River camera
Watch the time-lapse
Camera by the U.S. Geological Survey. Most take a picture every hour, some every few minutes; many stop at night.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 1:06 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 Pocatello to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 11 ft |
| Moderate flood stage | 10 ft |
| Flood stage | 8.5 ft |
| Action stage | 8 ft |
| Record crest (May 17, 1984) | 13.85 ft |
What floods at each level
From the National Weather Service, highest first.
- 10 ftSignificant flooding of agricultural land will occur from the Inkom and Blackrock area. Lowland flooding will occur along sections of the river in Pocatello from Portneuf Gap to the Cheyenne Avenue Bridge and downstream of the concrete channel beginning at Sacajawea Park.
- 9.4 ftWater will encroach around sitting benches near the river at the Pacific Recycling Trailhead.
- 9.15 ftFlooding of low lying agricultural land and pasture will occur in the Inkom and Blackrock area. Lowland flooding is likely along sections of the river between Portneuf Gap and the Cheyenne Avenue Bridge in Pocatello.
- 8.5 ftSections of Sacajawea Park will be under water and the trail is usually closed at this level. Marsh Creek near Inkom may also be over its banks.
- 8 ftWater will encroach onto portions of the bike and walking trail next to the river in Sacajawea Park in Pocatello.
Highest crests on record
- 13.85 ft — May 17, 1984
- 11.19 ft — May 31, 1983
- 11.14 ft — May 30, 2023
- 10.52 ft — May 3, 2006
- 9.95 ft — May 27, 2011
Recent crests: 11.14 ft (May 30, 2023) · 5.43 ft (May 8, 2022) · 5.31 ft (March 20, 2021) · 6.97 ft (May 2, 2020) · 9.26 ft (April 27, 2019)
Up and down the river, and nearby
- UpstreamPortneuf River at Topaz, ID
- DownstreamPortneuf River at Tyhee, ID
- Portneuf River at Inkom, ID, 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
- Marsh Creek (Eastern ID) near McCammon, ID
- Snake River at Neeley, ID
- Snake River at Blackfoot, ID
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (PIHI1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.