USGS Streamgage 12304500
Yaak River near Troy, MT
Yaak River near Troy, MT is USGS streamgage 12304500 in Montana, monitoring river discharge in hydrologic subbasin 17010103. It drains a watershed of about 792 square miles. Discharge records at this site go back to 1948. Typical flow runs near 421.7 cfs in July and 1,507.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 792 sq mi
- Gauge elevation
- 1,846 ft
- Subbasin (HUC-8)
- 17010103
- Coordinates
- 48.56172, -115.97016
- USGS site number
- 12304500
- Records begin
- 1948-05-27 (78 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 69 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 | 97 | 203.8 | 505.7 | |
| February | 116.2 | 247 | 719.9 | |
| March | 182.2 | 441.2 | 1,332.3 | |
| April | 714.2 | 1,507.9 | 3,396.3 | |
| May | 1,389.7 | 2,971.9 | 5,658.7 | |
| June | 659.8 | 1,606.8 | 3,352.7 | |
| July | 209.9 | 421.7 | 857.5 | |
| August | 102.2 | 167.8 | 280.8 | |
| September | 86 | 134.5 | 225.8 | |
| October | 94.7 | 151.4 | 279.8 | |
| November | 114.8 | 200.1 | 628.8 | |
| December | 102.2 | 197.2 | 597.1 |
All values in cubic feet per second (cfs).