Major Flood
15 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
13 ft
Minor Flood
9 ft
Action Stage
8 ft
What Floods at Each Level
14.5 ft
Water encroaches onto Interstate 15. Traffic is blocked. Some ranchers and other residents need to prepare for evacuation.
11.5 ft
A fairway on golf course floods. Williamson Park almost completely innundated.
9 ft
Water floods east and northeast portions of Williamson Park. Low spots on golf course flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 8, 1964 | 23.64 ft | 241,000 cfs |
| Jun 19, 1975 | 18.21 ft | 75,700 cfs |
| Jun 17, 1948 | 17.75 ft | 40,000 cfs |
About This Gauge
Get Flood Alerts for Marias River
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 Marias River near Shelby?
The Marias River near Shelby gauge is maintained by USGS (site 06099500) 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 Marias River near Shelby?
The NWS-defined flood stage for Marias River near Shelby is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 13 feet, and major flooding at 15 feet.
How do I get alerts when Marias River rises?
Download StormCast free on Google Play, go to River Gauges, and add Marias River near Shelby to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Marias River near Shelby gauge located?
The gauge is located in Toole County, Montana at coordinates 48.4272°N, 111.8898°W. USGS site number: 06099500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Marias River
On This River
Upstream: Birch Creek (MT) near Swift Dam near Dupuyer
Downstream: Marias River at Tiber Reservoir / Lake Elwell
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice during winter months.