Smith River (MT) at Truly
Montana — Water Level & Flood Stage
Located in Cascade County, Montana on the Smith River (MT). Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: ULLM8). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
15 ft
Moderate Flood
12 ft
Minor Flood
9 ft
Action Stage
8 ft
3,934 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
12 ft
River flooding buildings on Hastings Ranch.
9 ft
River out of banks and flooding grain and hay crops.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 3, 1953 | 22.5 ft | 30,300 cfs |
| Jun 3, 1953 | 22.5 ft | 30,300 cfs |
| Jun 10, 2011 | 10.25 ft | — |
| Jun 10, 2011 | 10.25 ft | — |
| Jun 14, 1967 | 9.8 ft | 9,500 cfs |
About This Gauge
NWS LID
ULLM8
River
Smith River (MT)
County
Cascade, MT
Coordinates
47.3570°N, 111.4078°W
Get Flood Alerts for Smith River (MT)
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Smith River (MT) at Truly?
The Smith River (MT) at Truly gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Smith River (MT) at Truly?
The NWS-defined flood stage for Smith River (MT) at Truly is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 12 feet, and major flooding at 15 feet.
How do I get alerts when Smith River (MT) rises?
Download StormCast free on Google Play, go to River Gauges, and add Smith River (MT) at Truly to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Smith River (MT) at Truly gauge located?
The gauge is located in Cascade County, Montana at coordinates 47.3570°N, 111.4078°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
- Stage measured manually and reported by river observer. No automated gauge on-site.