USGS Streamgage 13186000
SF Boise River near Featherville, ID
SF Boise River near Featherville, ID is USGS streamgage 13186000 in Idaho, monitoring river discharge in hydrologic subbasin 17050113. It drains a watershed of about 641 square miles. Discharge records at this site go back to 1945. Typical flow runs near 601.2 cfs in July and 1,071.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 641 sq mi
- Subbasin (HUC-8)
- 17050113
- Coordinates
- 43.49583, -115.30806
- USGS site number
- 13186000
- Records begin
- 1945-05-01 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 81 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 | 168.2 | 219.7 | 316.7 | |
| February | 181.7 | 232.8 | 353 | |
| March | 234.4 | 346 | 716.4 | |
| April | 493.7 | 1,071.2 | 2,427 | |
| May | 1,045.9 | 2,254.8 | 4,464.5 | |
| June | 817.6 | 1,958.3 | 3,991.7 | |
| July | 249.3 | 601.2 | 1,352 | |
| August | 157.2 | 254.4 | 428.3 | |
| September | 145.4 | 207.1 | 313.2 | |
| October | 164.6 | 226.3 | 316.1 | |
| November | 169 | 233.7 | 324.3 | |
| December | 155.5 | 219.6 | 313.6 |
All values in cubic feet per second (cfs).