St. Regis River near St. Regis, MT
River level and flood forecast · Mineral County
Normal1.7 ftas of Mon 1 PM
The river is 6.3 ft below flood stage (8 ft).
Forecast to hold near 1.7 ft through Mon, Oct 19, 12 PM.
Flow: 88 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
| Flood stage | 8 ft |
| Action stage | 7.5 ft |
| Record crest (December 20, 1933) | 14.9 ft |
What floods at each level
From the National Weather Service, highest first.
- 12 ftFlooding impacts much of the town of St. Regis especially those buildings closer to the confluence of the St. Regis and Clark Fork Rivers.
- 10 ftFlood affects many buildings and roads near the town of St. Regis.
- 9 ftFlooding affects low lying areas adjacent to the river. Minor flooding near the town of St. Regis and several roads in the area may also be flooded.
- 8 ftSome flooding occurrs at the I-90 freeway exit upstream of the town of St. Regis.
Highest crests on record
- 14.9 ft — December 20, 1933
- 9.4 ft — May 19, 1954
- 8.26 ft — February 9, 1996
- 8.16 ft — March 19, 2017
- 7.8 ft — May 18, 2008
Recent crests: 7.26 ft (December 11, 2025) · 4.72 ft (May 4, 2025) · 6.27 ft (May 7, 2022) · 4.86 ft (May 18, 2021) · 5.26 ft (May 31, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (STRM8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.