USGS Streamgage 13135520
NF Big Wood River near Sawtooth Nra Hq near Ketchum, ID
NF Big Wood River near Sawtooth Nra Hq near Ketchum, ID is USGS streamgage 13135520 in Idaho, monitoring river discharge in hydrologic subbasin 17040219. It drains a watershed of about 40 square miles. Discharge records at this site go back to 2011. Typical flow runs near 65.6 cfs in July and 38.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Idaho
- Drainage area
- 40 sq mi
- Subbasin (HUC-8)
- 17040219
- Coordinates
- 43.78611, -114.41917
- USGS site number
- 13135520
- Records begin
- 2011-04-19 (15 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 15 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 | 11.2 | 15 | 19.3 | |
| February | 10.8 | 13.6 | 18.7 | |
| March | 11.9 | 15.5 | 36.6 | |
| April | 19.8 | 38.8 | 97.8 | |
| May | 60.4 | 126.5 | 333.1 | |
| June | 86.8 | 177.2 | 520 | |
| July | 37 | 65.6 | 237.7 | |
| August | 23.6 | 31.7 | 73.7 | |
| September | 18.1 | 23.8 | 40.9 | |
| October | 16.5 | 23 | 33.5 | |
| November | 13.8 | 19.5 | 29.4 | |
| December | 12 | 16.3 | 22.3 |
All values in cubic feet per second (cfs).