USGS Streamgage 13211205
Boise River at Caldwell, ID
Boise River at Caldwell, ID is USGS streamgage 13211205 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. It drains a watershed of about 3,363 square miles. Discharge records at this site go back to 2015. Typical flow runs near 504 cfs in July and 2,477.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 3,363 sq mi
- Subbasin (HUC-8)
- 17050114
- Coordinates
- 43.67735, -116.70113
- USGS site number
- 13211205
- Records begin
- 2015-11-16 (11 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 11 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 | 506.5 | 556.5 | 654.2 | |
| February | 471.5 | 556.8 | 2,264 | |
| March | 335.5 | 620.7 | 7,317.1 | |
| April | 223.9 | 2,477.7 | 8,144.7 | |
| May | 342.3 | 1,904.2 | 8,147.4 | |
| June | 398.5 | 1,565.8 | 6,414 | |
| July | 234.6 | 504 | 1,464.8 | |
| August | 323.3 | 475 | 659.9 | |
| September | 395.5 | 645.4 | 878 | |
| October | 385.2 | 588.4 | 765.6 | |
| November | 505 | 564.3 | 604.9 | |
| December | 496 | 548.3 | 636.9 |
All values in cubic feet per second (cfs).