USGS Streamgage 13062500
Snake River at Blackfoot, ID
Snake River at Blackfoot, ID is USGS streamgage 13062500 in Idaho, monitoring river discharge in hydrologic subbasin 17040206. It drains a watershed of about 9,950 square miles. Discharge records at this site go back to 1978. Typical flow runs near 3,253.5 cfs in July and 4,281.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 9,950 sq mi
- Subbasin (HUC-8)
- 17040206
- Coordinates
- 43.1975, -112.36917
- USGS site number
- 13062500
- Records begin
- 1978-08-01 (48 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 48 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 | 1,469.4 | 2,314.8 | 5,970.6 | |
| February | 1,614.5 | 2,454.1 | 5,985.9 | |
| March | 1,743.2 | 2,575.2 | 10,655.8 | |
| April | 1,510 | 4,281.7 | 15,456.7 | |
| May | 1,752.9 | 6,762.9 | 19,648.4 | |
| June | 1,961 | 5,749.3 | 20,186.7 | |
| July | 1,731 | 3,253.5 | 10,950.6 | |
| August | 1,432.9 | 2,684.8 | 6,010 | |
| September | 1,068 | 2,446 | 4,698.7 | |
| October | 1,212.5 | 2,354.5 | 4,742.9 | |
| November | 2,059.3 | 2,641.3 | 5,477.3 | |
| December | 1,660.3 | 2,434.5 | 5,573.2 |
All values in cubic feet per second (cfs).