USGS Streamgage 12137800
Sultan River below Diversion Dam near Sultan, WA
Sultan River below Diversion Dam near Sultan, WA is USGS streamgage 12137800 in Washington, monitoring river discharge in hydrologic subbasin 17110009. It drains a watershed of about 77 square miles. Discharge records at this site go back to 1983. Typical flow runs near 107.9 cfs in July and 186.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 77 sq mi
- Gauge elevation
- 681 ft
- Subbasin (HUC-8)
- 17110009
- Coordinates
- 47.95927, -121.79734
- USGS site number
- 12137800
- Records begin
- 1983-05-01 (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 | 107.2 | 149.5 | 304.9 | |
| February | 114.6 | 165.6 | 312.8 | |
| March | 140 | 191 | 349.9 | |
| April | 151.6 | 186.4 | 277.8 | |
| May | 146.9 | 182.9 | 257.3 | |
| June | 120.9 | 145.5 | 190.8 | |
| July | 99.1 | 107.9 | 153 | |
| August | 96.8 | 109.7 | 143.4 | |
| September | 129.1 | 147.9 | 220.7 | |
| October | 158.8 | 183.8 | 293.5 | |
| November | 100.5 | 141.2 | 478.1 | |
| December | 100.7 | 128.4 | 329.9 |
All values in cubic feet per second (cfs).