Sun River at Simms MT
Is Sun River at Simms MT flooding right now?
Sun River at Simms MT measured 2.80 ft on 2026-09-11 01:30:00 UTC. That observation was 4.7 ft below its 7.5 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
2.80 ft
Streamflow
277 cfs
Minor flooding here begins at 7.5 ft, with major flooding at 10.5 ft. The highest crest on record was 13.7 ft on Tue, Jun 9, 1964.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 6 ft | 3.2 ft below |
| Minor flood | 7.5 ft | 4.7 ft below |
| Moderate flood | 8.5 ft | 5.7 ft below |
| Major flood | 10.5 ft | 7.7 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 13.7 ft | 1964-06-09 |
| 12.48 ft | 1975-06-20 |
| 10.75 ft | 2018-06-20 |
| 9.87 ft | 2011-06-08 |
| 9.15 ft | 2019-05-27 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Muddy Creek near Vaughn MT | 16.2 mi | Cascade County |
| Muddy Creek at Vaughn MT | 18.6 mi | Cascade County |
| Missouri River at Cascade MT | 19.4 mi | Cascade County |
| Sun River near Vaughn MT | 19.7 mi | Cascade County |
| Sun River below Willow Creek near Augusta MT | 20.5 mi | Teton County |
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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.