USGS Streamgage 12419000
Spokane River near Post Falls, ID
Spokane River near Post Falls, ID is USGS streamgage 12419000 in Idaho, monitoring river discharge in hydrologic subbasin 17010305. It drains a watershed of about 3,840 square miles. Discharge records at this site go back to 1913. Typical flow runs near 1,544.4 cfs in July and 13,661.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 3,840 sq mi
- Gauge elevation
- 2,068 ft
- Subbasin (HUC-8)
- 17010305
- Coordinates
- 47.70296, -116.97797
- USGS site number
- 12419000
- Records begin
- 1913-01-01 (113 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 114 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 | 1,543.5 | 3,722.3 | 10,339.7 | |
| February | 1,645.9 | 5,001.7 | 12,700 | |
| March | 2,793.9 | 7,409 | 15,074.2 | |
| April | 6,747.3 | 13,661.3 | 22,603.3 | |
| May | 6,400.6 | 17,364.5 | 27,271 | |
| June | 2,473.7 | 7,507.3 | 19,503.3 | |
| July | 779.1 | 1,544.4 | 3,825.8 | |
| August | 285.4 | 796.7 | 1,561.9 | |
| September | 520.5 | 1,142.6 | 1,797.7 | |
| October | 955.3 | 1,637.4 | 2,683.9 | |
| November | 1,165.7 | 2,382.3 | 5,236.7 | |
| December | 1,314.5 | 3,588.7 | 9,665.8 |
All values in cubic feet per second (cfs).