Blackfoot River near Bonner, MT
River level and flood forecast · Missoula County
Normal2.2 ftas of Mon 1:30 PM
The river is 7.8 ft below flood stage (10 ft).
Forecast to hold near 2.2 ft through Mon, Oct 19, 12 PM.
Flow: 648 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 9:35 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 17 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 10 ft |
| Action stage | 9.5 ft |
| Record crest (February 9, 1996) | 16 ft |
What floods at each level
From the National Weather Service, highest first.
- 10 ftFlooding to low lying areas adjacent to the river is possible.
Highest crests on record
- 16 ft — February 9, 1996
- 11.09 ft — May 11, 2018
- 10.89 ft — June 10, 1964
- 10.74 ft — June 20, 1975
- 10.5 ft — May 18, 1997
Recent crests: 5.17 ft (May 12, 2025) · 6.47 ft (June 12, 2022) · 7.54 ft (June 5, 2021) · 8.52 ft (May 21, 2020) · 11.09 ft (May 11, 2018)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BONM8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.