USGS Streamgage 06078500
North Fork Sun River near Augusta, MT
North Fork Sun River near Augusta, MT is USGS streamgage 06078500 in Montana, monitoring river discharge in hydrologic subbasin 10030104. It drains a watershed of about 259 square miles. Discharge records at this site go back to 1911. Typical flow runs near 355.6 cfs in July and 221.2 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 259 sq mi
- Gauge elevation
- 4,782 ft
- Subbasin (HUC-8)
- 10030104
- Coordinates
- 47.63986, -112.85933
- USGS site number
- 06078500
- Records begin
- 1911-06-03 (115 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 115 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 | 46.1 | 62.2 | 91.1 | |
| February | 45.6 | 64.4 | 91.4 | |
| March | 46.8 | 63.7 | 138.6 | |
| April | 79.3 | 221.2 | 620 | |
| May | 514.7 | 1,096 | 2,221.6 | |
| June | 538 | 1,161.2 | 2,315 | |
| July | 176.1 | 355.6 | 838.3 | |
| August | 94.8 | 149.6 | 229.1 | |
| September | 75.2 | 104.3 | 168.3 | |
| October | 66.4 | 97.9 | 168.3 | |
| November | 60 | 91 | 161.8 | |
| December | 52.6 | 76 | 126.9 |
All values in cubic feet per second (cfs).