USGS Streamgage 12138160
Sultan River below Powerplant near Sultan, WA
Sultan River below Powerplant near Sultan, WA is USGS streamgage 12138160 in Washington, monitoring river discharge in hydrologic subbasin 17110009. It drains a watershed of about 94 square miles. Discharge records at this site go back to 1983. Typical flow runs near 337.5 cfs in July and 650.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 94 sq mi
- Gauge elevation
- 305 ft
- Subbasin (HUC-8)
- 17110009
- Coordinates
- 47.90732, -121.8154
- USGS site number
- 12138160
- Records begin
- 1983-10-01 (43 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 43 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 | 388.2 | 1,210.1 | 1,785.8 | |
| February | 360.7 | 862.7 | 1,669.3 | |
| March | 345.2 | 630.8 | 1,590 | |
| April | 341.5 | 650.3 | 1,543.7 | |
| May | 330 | 596 | 1,388.4 | |
| June | 294.8 | 510.2 | 1,408.7 | |
| July | 208.5 | 337.5 | 871.3 | |
| August | 186.5 | 293.2 | 685.6 | |
| September | 212.8 | 347.3 | 604.1 | |
| October | 244.2 | 521.8 | 1,088.5 | |
| November | 360.9 | 1,310.3 | 1,866 | |
| December | 396.5 | 1,160.2 | 1,757.1 |
All values in cubic feet per second (cfs).