USGS Streamgage 12020000
Chehalis River near Doty, WA
Chehalis River near Doty, WA is USGS streamgage 12020000 in Washington, monitoring river discharge in hydrologic subbasin 17100103. It drains a watershed of about 113 square miles. Discharge records at this site go back to 1939. Typical flow runs near 59.2 cfs in July and 432.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 113 sq mi
- Gauge elevation
- 307 ft
- Subbasin (HUC-8)
- 17100103
- Coordinates
- 46.61732, -123.27764
- USGS site number
- 12020000
- Records begin
- 1939-10-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 87 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 | 276.5 | 796.7 | 2,919.4 | |
| February | 284.8 | 700 | 2,399.7 | |
| March | 269 | 634.8 | 1,824.8 | |
| April | 219.7 | 432.8 | 1,080.4 | |
| May | 121.3 | 210.8 | 504.2 | |
| June | 68.3 | 114.8 | 263.5 | |
| July | 37.2 | 59.2 | 101.3 | |
| August | 23.6 | 35.7 | 66.7 | |
| September | 22.1 | 36.2 | 156.5 | |
| October | 31.1 | 122.7 | 691.6 | |
| November | 136.3 | 570.6 | 2,224 | |
| December | 271 | 823.6 | 2,804.2 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Elk Creek below Deer Creek near Doty, WA
- South Fork Chehalis River near Wildwood, WA
- Chehalis River near Adna, WA
- South Fork Newaukum River near Onalaska, WA
- NF Newaukum River above Bear Creek near Forest, WA
- Newaukum River near Chehalis, WA
- Chehalis River at Wwtp at Chehalis, WA
- Skookumchuck River near Vail, WA