USGS Streamgage 12131500
South Fork Skykomish River at Skykomish, WA
South Fork Skykomish River at Skykomish, WA is USGS streamgage 12131500 in Washington, monitoring river discharge in hydrologic subbasin 17110009. It drains a watershed of about 243 square miles. Discharge records at this site go back to 2016. Typical flow runs near 775.1 cfs in July and 1,618.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 243 sq mi
- Gauge elevation
- 926 ft
- Subbasin (HUC-8)
- 17110009
- Coordinates
- 47.71104, -121.36073
- USGS site number
- 12131500
- Records begin
- 2016-10-01 (10 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 10 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 | 511.4 | 1,287.1 | 3,881.3 | |
| February | 442.7 | 1,105.5 | 3,766.8 | |
| March | 437 | 964.2 | 4,053.5 | |
| April | 817.7 | 1,618.7 | 2,807.7 | |
| May | 1,594.5 | 2,702.9 | 5,218.7 | |
| June | 1,011 | 2,149.3 | 4,482.3 | |
| July | 366 | 775.1 | 1,556.4 | |
| August | 189.4 | 302.8 | 446.3 | |
| September | 143.6 | 211.3 | 598.9 | |
| October | 160.2 | 611.6 | 3,054.6 | |
| November | 550.2 | 1,427 | 5,727 | |
| December | 498.5 | 1,330.7 | 6,565.2 |
All values in cubic feet per second (cfs).