USGS Streamgage 12426000
Spokane River below Nine Mile Dam at Spokane, WA
Spokane River below Nine Mile Dam at Spokane, WA is USGS streamgage 12426000 in Washington, monitoring river discharge in hydrologic subbasin 17010307. It drains a watershed of about 5,220 square miles. Discharge records at this site go back to 1948. Typical flow runs near 2,146.5 cfs in July and 14,086.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 5,220 sq mi
- Gauge elevation
- 1,542 ft
- Subbasin (HUC-8)
- 17010307
- Coordinates
- 47.78045, -117.5455
- USGS site number
- 12426000
- Records begin
- 1948-03-01 (78 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 78 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 | 2,987.7 | 4,589.7 | 10,081.3 | |
| February | 2,729.3 | 5,735.9 | 17,714.3 | |
| March | 3,775.8 | 10,044.8 | 26,009.7 | |
| April | 7,407 | 14,086.7 | 25,960 | |
| May | 6,978.7 | 18,274.2 | 32,090.3 | |
| June | 3,429 | 6,236 | 25,570 | |
| July | 1,326.5 | 2,146.5 | 6,896.8 | |
| August | 951 | 1,276.1 | 2,668.4 | |
| September | 1,002.2 | 1,386.7 | 2,079 | |
| October | 1,448.7 | 2,166.5 | 3,402.9 | |
| November | 2,364.7 | 3,174.3 | 6,272.7 | |
| December | 2,836.5 | 4,229.4 | 9,929.4 |
All values in cubic feet per second (cfs).