USGS Streamgage 12037400
Wynoochee River above Black Creek near Montesano, WA
Wynoochee River above Black Creek near Montesano, WA is USGS streamgage 12037400 in Washington, monitoring river discharge in hydrologic subbasin 17100104. It drains a watershed of about 155 square miles. Discharge records at this site go back to 1956. Typical flow runs near 289.5 cfs in July and 796.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 155 sq mi
- Gauge elevation
- 39 ft
- Subbasin (HUC-8)
- 17100104
- Coordinates
- 47.01148, -123.65544
- USGS site number
- 12037400
- Records begin
- 1956-10-01 (70 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 | 717.5 | 1,984.5 | 5,589.4 | |
| February | 647.1 | 1,444.5 | 4,314.5 | |
| March | 572.6 | 1,259 | 3,409 | |
| April | 473 | 796.3 | 1,980.7 | |
| May | 329.1 | 534.3 | 1,195 | |
| June | 255.9 | 405.1 | 890.2 | |
| July | 198.7 | 289.5 | 454.5 | |
| August | 161.3 | 212.6 | 320.2 | |
| September | 158.9 | 253.8 | 719 | |
| October | 174.8 | 498.3 | 2,175.5 | |
| November | 473 | 1,643.3 | 5,198 | |
| December | 700.6 | 1,927.7 | 6,119.7 |
All values in cubic feet per second (cfs).