USGS Streamgage 12392155
Lightning Creek at Clark Fork, ID
Lightning Creek at Clark Fork, ID is USGS streamgage 12392155 in Idaho, monitoring river discharge in hydrologic subbasin 17010213. It drains a watershed of about 118 square miles. Discharge records at this site go back to 1988. Typical flow runs near 113.1 cfs in July and 625.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 118 sq mi
- Gauge elevation
- 2,113 ft
- Subbasin (HUC-8)
- 17010213
- Coordinates
- 48.15167, -116.18167
- USGS site number
- 12392155
- Records begin
- 1988-10-01 (38 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 38 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 | 44.5 | 129.4 | 449.9 | |
| February | 48.7 | 117.8 | 579.8 | |
| March | 100.5 | 229.9 | 731.3 | |
| April | 273.1 | 625.2 | 1,375.3 | |
| May | 689.1 | 1,439.5 | 2,745.5 | |
| June | 270.2 | 914.5 | 2,014.3 | |
| July | 38.1 | 113.1 | 502.4 | |
| August | 9.7 | 21.9 | 66 | |
| September | 3.3 | 13 | 58.8 | |
| October | 4.3 | 29 | 276.7 | |
| November | 24 | 164.2 | 788.8 | |
| December | 32.2 | 145 | 625.4 |
All values in cubic feet per second (cfs).