USGS Streamgage 06211500
Willow Creek near Boyd, MT
Willow Creek near Boyd, MT is USGS streamgage 06211500 in Montana, monitoring river discharge in hydrologic subbasin 10070006. It drains a watershed of about 49 square miles. Discharge records at this site go back to 1937. Typical flow runs near 55.2 cfs in July and 25.6 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 49 sq mi
- Gauge elevation
- 4,264 ft
- Subbasin (HUC-8)
- 10070006
- Coordinates
- 45.42215, -109.23053
- USGS site number
- 06211500
- Records begin
- 1937-05-22 (89 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 88 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 | — | 9.3 | — | |
| February | — | 15.3 | — | |
| March | 6.5 | 16.4 | 38.6 | |
| April | 11 | 25.6 | 68.9 | |
| May | 8 | 31.7 | 97.9 | |
| June | 19.2 | 47.7 | 91.8 | |
| July | 25.2 | 55.2 | 80.7 | |
| August | 19.4 | 37.8 | 58.8 | |
| September | 20.2 | 34 | 55.6 | |
| October | 20.9 | 30.1 | 41.3 | |
| November | 14.9 | 21.6 | 31.9 | |
| December | 9.2 | 17 | 38.1 |
All values in cubic feet per second (cfs).