USGS Streamgage 06035000
Willow Creek near Harrison, MT
Willow Creek near Harrison, MT is USGS streamgage 06035000 in Montana, monitoring river discharge in hydrologic subbasin 10020005. It drains a watershed of about 86 square miles. Discharge records at this site go back to 1938. Typical flow runs near 41.9 cfs in July and 38.5 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 86 sq mi
- Gauge elevation
- 4,747 ft
- Subbasin (HUC-8)
- 10020005
- Coordinates
- 45.72306, -111.74102
- USGS site number
- 06035000
- Records begin
- 1938-05-01 (88 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 | 14 | 23.7 | 35.6 | |
| February | 16.3 | 26.1 | 38.2 | |
| March | 21.1 | 29.5 | 43.1 | |
| April | 20.8 | 38.5 | 63 | |
| May | 12.6 | 53.4 | 130.3 | |
| June | 20.9 | 97.1 | 248.7 | |
| July | 5.6 | 41.9 | 131.8 | |
| August | 2.8 | 6.8 | 31.2 | |
| September | 3.7 | 9.8 | 46.2 | |
| October | 5.8 | 24.3 | 55.8 | |
| November | 14.1 | 36.1 | 50.3 | |
| December | 15.6 | 29.6 | 42.4 |
All values in cubic feet per second (cfs).