USGS Streamgage 06027600
Jefferson River at Parsons Bdg near Silver Star, MT
Jefferson River at Parsons Bdg near Silver Star, MT is USGS streamgage 06027600 in Montana, monitoring river discharge in hydrologic subbasin 10020005. It drains a watershed of about 7,759 square miles. Discharge records at this site go back to 2006. Typical flow runs near 909 cfs in July and 1,658.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 7,759 sq mi
- Gauge elevation
- 4,427 ft
- Subbasin (HUC-8)
- 10020005
- Coordinates
- 45.7475, -112.18723
- USGS site number
- 06027600
- Records begin
- 2006-07-01 (20 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 20 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
Only 8 of 12 months have enough record to summarize; the rest are omitted.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| April | — | 1,658.3 | — | |
| May | — | 3,035.5 | — | |
| June | 341.7 | 3,640 | 9,466.7 | |
| July | 148.8 | 909 | 2,559.5 | |
| August | 45.8 | 200.2 | 769.1 | |
| September | 125.7 | 390.3 | 1,044.5 | |
| October | — | 1,270.1 | — | |
| November | — | 761.7 | — |
All values in cubic feet per second (cfs).