USGS Streamgage 06291500
Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT
Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT is USGS streamgage 06291500 in Montana, monitoring river discharge in hydrologic subbasin 10080016. It drains a watershed of about 84 square miles. Discharge records at this site go back to 1939. Typical flow runs near 57.7 cfs in July and 25 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 84 sq mi
- Gauge elevation
- 4,177 ft
- Subbasin (HUC-8)
- 10080016
- Coordinates
- 45.12775, -107.60192
- USGS site number
- 06291500
- Records begin
- 1939-04-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 70 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 | 9.2 | 15.4 | 23.2 | |
| February | 9.4 | 16 | 24.3 | |
| March | 11.2 | 17.9 | 31 | |
| April | 14.5 | 25 | 55 | |
| May | 47.9 | 101 | 215.2 | |
| June | 69 | 162.6 | 365.4 | |
| July | 26 | 57.7 | 107.4 | |
| August | 14.2 | 25.6 | 42.6 | |
| September | 11.9 | 20.9 | 33.7 | |
| October | 13.3 | 19.9 | 29.5 | |
| November | 12.1 | 18.5 | 25.7 | |
| December | 9.9 | 16.5 | 23.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 162.6 cfs, against 15.4 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT?
- It depends on the month. In January, half of days historically fall near 15.4 cfs, with the middle 80% of days between 9.2 and 23.2 cfs. The month-by-month table on this page gives the full range.
- How long has Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT been measured?
- Discharge records at USGS site 06291500 begin in 1939, about 87 years, covering roughly 3,046 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT?
- The gauge sits at 45.12775, -107.60192, in Montana, in hydrologic subbasin 10080016, at an elevation of about 4,177 feet, draining roughly 84 square miles.
- Can I use Lodge Grass Creek ab Willow Creek diversion, near Wyola, MT data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.