USGS Streamgage 14015000
Mill Creek at Walla Walla, WA
Mill Creek at Walla Walla, WA is USGS streamgage 14015000 in Washington, monitoring river discharge in hydrologic subbasin 17070102. It drains a watershed of about 96 square miles. Discharge records at this site go back to 1941. Typical flow runs near 2.6 cfs in July and 135.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 96 sq mi
- Subbasin (HUC-8)
- 17070102
- Coordinates
- 46.07625, -118.27357
- USGS site number
- 14015000
- Records begin
- 1941-04-11 (85 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 85 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 | 27.6 | 91.5 | 356.5 | |
| February | 40.1 | 111.3 | 376 | |
| March | 47.5 | 140.4 | 374.7 | |
| April | 52.7 | 135.8 | 339.9 | |
| May | 16.6 | 81.8 | 206.4 | |
| June | 0.7 | 20.6 | 113.9 | |
| July | 0 | 2.6 | 10.7 | |
| August | 0 | 1.8 | 6.7 | |
| September | 0 | 1.6 | 11.9 | |
| October | 0 | 2.8 | 24.8 | |
| November | 1.3 | 22.3 | 120.3 | |
| December | 10 | 65.3 | 252.7 |
All values in cubic feet per second (cfs).