USGS Streamgage 12167000
NF Stillaguamish River near Arlington, WA
NF Stillaguamish River near Arlington, WA is USGS streamgage 12167000 in Washington, monitoring river discharge in hydrologic subbasin 17110008. It drains a watershed of about 262 square miles. Discharge records at this site go back to 1928. Typical flow runs near 648.8 cfs in July and 1,900.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 262 sq mi
- Gauge elevation
- 121 ft
- Subbasin (HUC-8)
- 17110008
- Coordinates
- 48.26146, -122.04762
- USGS site number
- 12167000
- Records begin
- 1928-08-01 (98 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 98 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 | 805.3 | 1,919 | 6,107.4 | |
| February | 814.5 | 1,698.3 | 4,619.7 | |
| March | 949.8 | 1,753.2 | 3,813.5 | |
| April | 1,171.3 | 1,900.3 | 3,498.3 | |
| May | 1,054.2 | 1,893.9 | 3,415.2 | |
| June | 673.5 | 1,381.2 | 2,744.3 | |
| July | 362.3 | 648.8 | 1,495.6 | |
| August | 222.9 | 341.3 | 735.7 | |
| September | 198.9 | 353.7 | 1,422.3 | |
| October | 280.3 | 889.9 | 3,613.2 | |
| November | 666.7 | 2,005 | 5,986.3 | |
| December | 888 | 2,070.3 | 6,103.2 |
All values in cubic feet per second (cfs).