USGS Streamgage 12354000
St. Regis River near St. Regis, MT
St. Regis River near St. Regis, MT is USGS streamgage 12354000 in Montana, monitoring river discharge in hydrologic subbasin 17010204. It drains a watershed of about 304 square miles. Discharge records at this site go back to 1910. Typical flow runs near 275.3 cfs in July and 1,022.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 304 sq mi
- Gauge elevation
- 2,652 ft
- Subbasin (HUC-8)
- 17010204
- Coordinates
- 47.29671, -115.12262
- USGS site number
- 12354000
- Records begin
- 1910-09-01 (116 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 115 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 84.6 | 150.4 | 422.1 | |
| February | 96.1 | 185.1 | 606.8 | |
| March | 140 | 331.5 | 951.8 | |
| April | 454.1 | 1,022.3 | 2,031.3 | |
| May | 793.7 | 1,687.7 | 3,332.9 | |
| June | 424.1 | 1,040.4 | 2,386.7 | |
| July | 161.3 | 275.3 | 630.9 | |
| August | 92.2 | 133.4 | 209.8 | |
| September | 74.6 | 106.7 | 157 | |
| October | 79.4 | 108.3 | 194.9 | |
| November | 93.2 | 136.5 | 409.6 | |
| December | 84.3 | 137.5 | 368 |
All values in cubic feet per second (cfs).