Thompson River near Thompson Falls MT

Sanders County, Montana · USGS gauge 12389500 · NWS THRM8 · Montana river levels

Nearby: river levels near Thompson Falls

Is Thompson River near Thompson Falls MT flooding right now?

Thompson River near Thompson Falls MT measured 2.78 ft on 2026-09-11 01:45:00 UTC. That observation was 4.2 ft below its 7 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
2.78 ft
as of 33 min ago
Streamflow
159 cfs
data refreshed 15 min ago

Minor flooding here begins at 7 ft. The highest crest on record was 8.53 ft on Tue, Jun 9, 1964.

Flood forecast

NWS forecast, issued 10 hours ago. Forecasts are issued for select river points and update through the day.

Flood stages at this gauge

CategoryStageCurrent distance
Action6.5 ft3.7 ft below
Minor flood7 ft4.2 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

StageDate
8.53 ft1964-06-09
8.35 ft1997-05-17
7.84 ft2008-05-19
7.77 ft1956-05-21
7.72 ft1996-02-09

Nearby gauges

GaugeDistanceCounty
Prospect Creek at Thompson Falls MT5.9 miSanders County
Clark Fork near Plains MT20.7 miSanders County
St. Regis River near St. Regis, MT21.0 miMineral County
Clark Fork at St. Regis MT21.1 miMineral County
Sf Coeur D Alene River above Deadman Gulch near Mullan ID26.3 miShoshone County
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast