USGS Streamgage 11319500
Mokelumne River near Mokelumne Hill, CA
Mokelumne River near Mokelumne Hill, CA is USGS streamgage 11319500 in California, monitoring river discharge in hydrologic subbasin 18040012. It drains a watershed of about 544 square miles. Discharge records at this site go back to 1901. Typical flow runs near 586.8 cfs in July and 1,221 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 544 sq mi
- Gauge elevation
- 585 ft
- Subbasin (HUC-8)
- 18040012
- Coordinates
- 38.31269, -120.72021
- USGS site number
- 11319500
- Records begin
- 1901-02-19 (125 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 98 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 | 214 | 636.9 | 1,922.9 | |
| February | 219.4 | 725 | 1,929.3 | |
| March | 310.3 | 928.6 | 2,402.6 | |
| April | 332.2 | 1,221 | 2,723 | |
| May | 328.5 | 1,596.5 | 3,950.3 | |
| June | 364.1 | 1,324.9 | 3,795.7 | |
| July | 281.2 | 586.8 | 1,310.7 | |
| August | 282.4 | 547 | 867.1 | |
| September | 238.4 | 535.3 | 743.1 | |
| October | 166 | 536.5 | 708.1 | |
| November | 161.5 | 557.6 | 780.9 | |
| December | 188.5 | 589.8 | 1,256 |
All values in cubic feet per second (cfs).
Common questions
- When does Mokelumne River near Mokelumne Hill, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 1,596.5 cfs, against 535.3 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Mokelumne River near Mokelumne Hill, CA?
- It depends on the month. In January, half of days historically fall near 636.9 cfs, with the middle 80% of days between 214 and 1,922.9 cfs. The month-by-month table on this page gives the full range.
- How long has Mokelumne River near Mokelumne Hill, CA been measured?
- Discharge records at USGS site 11319500 begin in 1901, about 125 years, covering roughly 8,821 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Mokelumne River near Mokelumne Hill, CA?
- The gauge sits at 38.31269, -120.72021, in California, in hydrologic subbasin 18040012, at an elevation of about 585 feet, draining roughly 544 square miles.
- Can I use Mokelumne River near Mokelumne Hill, 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.