USGS Streamgage 12089000
Tanwax Creek near McKenna, WA
Tanwax Creek near McKenna, WA is USGS streamgage 12089000 in Washington, monitoring river discharge in hydrologic subbasin 17110015. It drains a watershed of about 26 square miles. Discharge records at this site go back to 1944. Typical flow runs near 3.2 cfs in July and 39.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 26 sq mi
- Gauge elevation
- 399 ft
- Subbasin (HUC-8)
- 17110015
- Coordinates
- 46.86507, -122.4526
- USGS site number
- 12089000
- Records begin
- 1944-12-01 (82 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 6 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 | — | 53.6 | — | |
| February | — | 68.7 | — | |
| March | — | 56.2 | — | |
| April | — | 39.3 | — | |
| May | — | 15.5 | — | |
| June | — | 8.1 | — | |
| July | — | 3.2 | — | |
| August | — | 1.7 | — | |
| September | — | 1.8 | — | |
| October | — | 3.3 | — | |
| November | — | 25.1 | — | |
| December | — | 49.2 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Tanwax Creek near McKenna, WA normally run highest?
- February, on the long-term record. The median daily flow that month is about 68.7 cfs, against 1.7 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- How long has Tanwax Creek near McKenna, WA been measured?
- Discharge records at USGS site 12089000 begin in 1944, about 82 years. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Tanwax Creek near McKenna, WA?
- The gauge sits at 46.86507, -122.4526, in Washington, in hydrologic subbasin 17110015, at an elevation of about 399 feet, draining roughly 26 square miles.
- Can I use Tanwax Creek near McKenna, 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.