USGS Streamgage 12352500
Bitterroot River near Missoula, MT
Bitterroot River near Missoula, MT is USGS streamgage 12352500 in Montana, monitoring river discharge in hydrologic subbasin 17010205. It drains a watershed of about 2,824 square miles. Discharge records at this site go back to 1898. Typical flow runs near 2,094.4 cfs in July and 2,494 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 2,824 sq mi
- Gauge elevation
- 3,120 ft
- Subbasin (HUC-8)
- 17010205
- Coordinates
- 46.83174, -114.05486
- USGS site number
- 12352500
- Records begin
- 1898-07-01 (128 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 127 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 | 564.4 | 781.1 | 1,315.2 | |
| February | 578.3 | 822.4 | 1,677.6 | |
| March | 734.3 | 1,112.5 | 2,237.4 | |
| April | 1,176.2 | 2,494 | 4,804.3 | |
| May | 3,234.5 | 6,165.2 | 12,578.1 | |
| June | 3,632.3 | 7,268 | 13,771.3 | |
| July | 874.9 | 2,094.4 | 4,712.6 | |
| August | 527.8 | 785.8 | 1,292.3 | |
| September | 525 | 773.2 | 1,186 | |
| October | 611.6 | 878.9 | 1,450.3 | |
| November | 699.9 | 1,014.1 | 1,681.7 | |
| December | 579.5 | 878.8 | 1,425.5 |
All values in cubic feet per second (cfs).