Rivers in Montana
Thompson River near Thompson Falls
Below flood stage
2.74ftStage
Observed Tue, Sep 22, 3:45 AM MDT
- Flood stage
- 7.00 ft
- Forecast crest
- 2.76 ftTue, Sep 29, 12:00 AM MDT
- Record crest
- 8.53 ft1964
Flood stages and impacts
| Category | Stage |
|---|---|
| Minor flood | 7.00 ft |
| Action | 6.50 ft |
- 9.00 ftFlooding affects low lying areas adjacent to the river. Homes in the community of Snider experience flooding and several roads in the community become inundated.
- 7.00 ftFlooding affects low lying areas adjacent to the river. Flooding also affects homes in the community of Snider.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | -99900% |
| Major flooding | -99900% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 21, 2026.
Crest history
23 crests on NOAA’s list since 1948.
| # | Date | Stage |
|---|---|---|
| 1 | June 9, 1964 | 8.53 ft |
| 2 | May 17, 1997 | 8.35 ft |
| 3 | May 19, 2008 | 7.84 ft |
| 4 | May 21, 1956 | 7.77 ft |
| 5 | February 9, 1996 | 7.72 ft |
| 6 | May 16, 2011 | 7.67 ft |
| 7 | May 23, 2002 | 7.65 ft |
| 8 | March 19, 2017 | 7.15 ft |
| 9 | June 1, 1972 | 7.07 ft |
| 10 | April 25, 2012 | 7.01 ft |
| 11 | January 16, 1974 | 6.85 ft |
| 12 | May 23, 1967 | 6.85 ft |
| 13 | May 13, 1971 | 6.80 ft |
| 14 | May 7, 2018 | 6.62 ft |
| 15 | May 11, 1976 | 6.51 ft |
| 16 | May 27, 1961 | 6.33 ft |
| 17 | May 19, 1991 | 6.16 ft |
| 18 | May 25, 2021 | 5.33 ft |
| 19 | May 7, 2022 | 5.15 ft |
| 20 | December 11, 2025 | 5.14 ft |
| 21 | May 22, 2020 | 5.10 ft |
| 22 | May 5, 2025 | 3.99 ft |
| 23 | May 28, 1948 | 0.00 ft |
Most recent crests
- December 11, 2025: 5.14 ft
- May 5, 2025: 3.99 ft
- May 7, 2022: 5.15 ft
- May 25, 2021: 5.33 ft
- May 22, 2020: 5.10 ft
- May 7, 2018: 6.62 ft
- March 19, 2017: 7.15 ft
- April 25, 2012: 7.01 ft
- May 16, 2011: 7.67 ft
- May 19, 2008: 7.84 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.