USGS Streamgage 12170300
Stillaguamish River near Stanwood, WA
Stillaguamish River near Stanwood, WA is USGS streamgage 12170300 in Washington, monitoring river discharge in hydrologic subbasin 17110008. It drains a watershed of about 662 square miles. Discharge records at this site go back to 2013. Typical flow runs near 1,026.7 cfs in July and 4,940 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 662 sq mi
- Gauge elevation
- 7 ft
- Subbasin (HUC-8)
- 17110008
- Coordinates
- 48.21121, -122.33737
- USGS site number
- 12170300
- Records begin
- 2013-09-27 (13 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 3 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 | — | 6,122.6 | — | |
| February | — | 5,160.7 | — | |
| March | — | 7,883.9 | — | |
| April | — | 4,940 | — | |
| May | — | 3,983.2 | — | |
| June | — | 1,678.2 | — | |
| July | — | 1,026.7 | — | |
| August | — | 643.9 | — | |
| September | — | 1,393.1 | — | |
| October | — | 4,644.9 | — | |
| November | — | 7,931.7 | — | |
| December | — | 4,907.1 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Stillaguamish River near Stanwood, WA normally run highest?
- November, on the long-term record. The median daily flow that month is about 7,931.7 cfs, against 643.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- How long has Stillaguamish River near Stanwood, WA been measured?
- Discharge records at USGS site 12170300 begin in 2013, about 13 years, covering roughly 973 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Stillaguamish River near Stanwood, WA?
- The gauge sits at 48.21121, -122.33737, in Washington, in hydrologic subbasin 17110008, at an elevation of about 7 feet, draining roughly 662 square miles.
- Can I use Stillaguamish River near Stanwood, WA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.