USGS Streamgage 12095000
South Prairie Creek at South Prairie, WA
South Prairie Creek at South Prairie, WA is USGS streamgage 12095000 in Washington, monitoring river discharge in hydrologic subbasin 17110014. It drains a watershed of about 80 square miles. Discharge records at this site go back to 1950. Typical flow runs near 79.3 cfs in July and 245.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 80 sq mi
- Gauge elevation
- 439 ft
- Subbasin (HUC-8)
- 17110014
- Coordinates
- 47.13955, -122.09261
- USGS site number
- 12095000
- Records begin
- 1950-03-04 (76 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 77 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 | 124.6 | 279.9 | 808.2 | |
| February | 124 | 234.8 | 635.8 | |
| March | 130.4 | 233.2 | 486.7 | |
| April | 152.8 | 245.5 | 492.6 | |
| May | 128.6 | 234.5 | 426 | |
| June | 86.1 | 175.1 | 390 | |
| July | 47.2 | 79.3 | 175.7 | |
| August | 30.9 | 45.7 | 92.9 | |
| September | 29 | 44.9 | 119 | |
| October | 37.5 | 84.5 | 295 | |
| November | 78.7 | 199.9 | 626.6 | |
| December | 112.4 | 251.8 | 688.1 |
All values in cubic feet per second (cfs).