USGS Streamgage 12302055
Fisher River near Libby, MT
Fisher River near Libby, MT is USGS streamgage 12302055 in Montana, monitoring river discharge in hydrologic subbasin 17010102. It drains a watershed of about 842 square miles. Discharge records at this site go back to 1948. Typical flow runs near 226 cfs in July and 932.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 842 sq mi
- Gauge elevation
- 2,142 ft
- Subbasin (HUC-8)
- 17010102
- Coordinates
- 48.3556, -115.31465
- USGS site number
- 12302055
- Records begin
- 1948-05-22 (78 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 58 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 | 85.6 | 162.3 | 427.6 | |
| February | 102.2 | 192.3 | 699.6 | |
| March | 158.2 | 387 | 1,169.5 | |
| April | 394.1 | 932.7 | 2,222.3 | |
| May | 527.6 | 1,151.9 | 2,410 | |
| June | 286.2 | 665.5 | 1,408.6 | |
| July | 117.1 | 226 | 478.6 | |
| August | 70.3 | 118.2 | 198.1 | |
| September | 64.8 | 105.7 | 151.4 | |
| October | 76.8 | 112.2 | 189.7 | |
| November | 97.5 | 150.1 | 368.4 | |
| December | 90.8 | 158.4 | 412.3 |
All values in cubic feet per second (cfs).