USGS Streamgage 12026150
Skookumchuck River below Bldy Run Creek near Centralia, WA
Skookumchuck River below Bldy Run Creek near Centralia, WA is USGS streamgage 12026150 in Washington, monitoring river discharge in hydrologic subbasin 17100103. It drains a watershed of about 66 square miles. Discharge records at this site go back to 1939. Typical flow runs near 102.5 cfs in July and 257.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 66 sq mi
- Gauge elevation
- 331 ft
- Subbasin (HUC-8)
- 17100103
- Coordinates
- 46.7901, -122.7354
- USGS site number
- 12026150
- Records begin
- 1939-12-15 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 54 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 | 144.5 | 382.3 | 1,091.1 | |
| February | 141.8 | 329.4 | 862.8 | |
| March | 114.3 | 308.9 | 789.7 | |
| April | 138.6 | 257.1 | 575.7 | |
| May | 107.9 | 168.4 | 304.9 | |
| June | 89.4 | 120.5 | 222.7 | |
| July | 79.4 | 102.5 | 138.6 | |
| August | 67.4 | 95.3 | 122.5 | |
| September | 82.7 | 133.1 | 153.7 | |
| October | 93.4 | 133.4 | 173.1 | |
| November | 99.5 | 175.9 | 438.3 | |
| December | 124.2 | 324.9 | 1,051.6 |
All values in cubic feet per second (cfs).