USGS Streamgage 06025500
Big Hole River near Melrose, MT
Big Hole River near Melrose, MT is USGS streamgage 06025500 in Montana, monitoring river discharge in hydrologic subbasin 10020004. It drains a watershed of about 2,472 square miles. Discharge records at this site go back to 1923. Typical flow runs near 1,081.6 cfs in July and 1,220.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 2,472 sq mi
- Gauge elevation
- 5,037 ft
- Subbasin (HUC-8)
- 10020004
- Coordinates
- 45.52658, -112.70172
- USGS site number
- 06025500
- Records begin
- 1923-10-01 (103 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 102 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 | 224.9 | 341.6 | 479.9 | |
| February | 244.8 | 341.6 | 478.4 | |
| March | 307.3 | 413.5 | 762 | |
| April | 569.9 | 1,220.4 | 2,730 | |
| May | 1,271.7 | 2,781.3 | 5,899.4 | |
| June | 1,232.2 | 3,407.3 | 7,147.3 | |
| July | 370.3 | 1,081.6 | 2,317.1 | |
| August | 176.9 | 372.7 | 779.7 | |
| September | 171.4 | 305.5 | 602.6 | |
| October | 273.1 | 451.3 | 751.5 | |
| November | 301.9 | 463.3 | 698.8 | |
| December | 243.9 | 363.3 | 532.9 |
All values in cubic feet per second (cfs).