USGS Streamgage 11316670
NF Mokelumne River below Tiger C Reservoir near West Pt, CA
NF Mokelumne River below Tiger C Reservoir near West Pt, CA is USGS streamgage 11316670 in California, monitoring river discharge in hydrologic subbasin 18040012. It drains a watershed of about 357 square miles. Discharge records at this site go back to 1985. Typical flow runs near 52.6 cfs in July and 243.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 357 sq mi
- Subbasin (HUC-8)
- 18040012
- Coordinates
- 38.44019, -120.50493
- USGS site number
- 11316670
- Records begin
- 1985-09-30 (41 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 41 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 | 12.1 | 48.9 | 421.5 | |
| February | 12 | 48.6 | 503.6 | |
| March | 12.1 | 85.5 | 1,118.8 | |
| April | 12.4 | 243.8 | 1,514 | |
| May | 12.7 | 275.1 | 1,841 | |
| June | 12.6 | 123.4 | 1,435.1 | |
| July | 12.7 | 52.6 | 709.4 | |
| August | 13.8 | 46.7 | 285.8 | |
| September | 13.9 | 45.5 | 201.2 | |
| October | 14 | 44.4 | 106.5 | |
| November | 12.1 | 39.1 | 128.9 | |
| December | 12.2 | 44.7 | 348.8 |
All values in cubic feet per second (cfs).
Common questions
- When does NF Mokelumne River below Tiger C Reservoir near West Pt, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 275.1 cfs, against 39.1 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for NF Mokelumne River below Tiger C Reservoir near West Pt, CA?
- It depends on the month. In January, half of days historically fall near 48.9 cfs, with the middle 80% of days between 12.1 and 421.5 cfs. The month-by-month table on this page gives the full range.
- How long has NF Mokelumne River below Tiger C Reservoir near West Pt, CA been measured?
- Discharge records at USGS site 11316670 begin in 1985, about 41 years, covering roughly 7,968 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is NF Mokelumne River below Tiger C Reservoir near West Pt, CA?
- The gauge sits at 38.44019, -120.50493, in California, in hydrologic subbasin 18040012, draining roughly 357 square miles.
- Can I use NF Mokelumne River below Tiger C Reservoir near West Pt, CA 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.