USGS Streamgage 06307662
Tongue River at Ashland, MT
Tongue River at Ashland, MT is USGS streamgage 06307662 in Montana, monitoring river discharge in hydrologic subbasin 10090102. It drains a watershed of about 2,900 square miles. Discharge records at this site go back to 2021. Typical flow runs near 520 cfs in July and 161.9 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 2,900 sq mi
- Gauge elevation
- 2,902 ft
- Subbasin (HUC-8)
- 10090102
- Coordinates
- 45.59775, -106.27494
- USGS site number
- 06307662
- Records begin
- 2021-09-28 (5 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 5 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 | — | 129.5 | — | |
| February | — | 136.5 | — | |
| March | — | 134.4 | — | |
| April | — | 161.9 | — | |
| May | — | 793.9 | — | |
| June | — | 1,675.1 | — | |
| July | — | 520 | — | |
| August | — | 364.9 | — | |
| September | — | 306 | — | |
| October | — | 203.6 | — | |
| November | — | 182.2 | — | |
| December | — | 141.3 | — |
All values in cubic feet per second (cfs).