USGS Streamgage 06036650
Jefferson River near Three Forks, MT
Jefferson River near Three Forks, MT is USGS streamgage 06036650 in Montana, monitoring river discharge in hydrologic subbasin 10020005. It drains a watershed of about 9,558 square miles. Discharge records at this site go back to 1978. Typical flow runs near 1,267.1 cfs in July and 2,077 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 9,558 sq mi
- Gauge elevation
- 4,081 ft
- Subbasin (HUC-8)
- 10020005
- Coordinates
- 45.89714, -111.59567
- USGS site number
- 06036650
- Records begin
- 1978-10-01 (48 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 48 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 | 712 | 1,085.2 | 1,633.5 | |
| February | 792.7 | 1,126.2 | 1,732.8 | |
| March | 962.8 | 1,342.9 | 2,076.8 | |
| April | 1,177.3 | 2,077 | 3,583.7 | |
| May | 1,255.6 | 3,306.8 | 7,031 | |
| June | 1,469.6 | 4,080.7 | 9,869.7 | |
| July | 353 | 1,267.1 | 4,543.9 | |
| August | 157.9 | 441.1 | 1,763.5 | |
| September | 308.7 | 703.3 | 1,928 | |
| October | 819.6 | 1,290 | 2,240 | |
| November | 1,018.3 | 1,389 | 2,206.3 | |
| December | 783.3 | 1,142.6 | 1,827.7 |
All values in cubic feet per second (cfs).