USGS Streamgage 11335000
Cosumnes River A Michigan Bar, CA
Cosumnes River A Michigan Bar, CA is USGS streamgage 11335000 in California, monitoring river discharge in hydrologic subbasin 18040013. It drains a watershed of about 536 square miles. Discharge records at this site go back to 1907. Typical flow runs near 43.2 cfs in July and 833.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 536 sq mi
- Gauge elevation
- 171 ft
- Subbasin (HUC-8)
- 18040013
- Coordinates
- 38.50017, -121.04519
- USGS site number
- 11335000
- Records begin
- 1907-03-19 (119 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 119 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 | 53.3 | 250.9 | 2,359.4 | |
| February | 110.8 | 571.7 | 2,697.9 | |
| March | 216.3 | 750 | 2,715.5 | |
| April | 218.5 | 833.9 | 2,205 | |
| May | 104 | 534.8 | 1,482.3 | |
| June | 31.7 | 171.4 | 587.6 | |
| July | 5.5 | 43.2 | 129.2 | |
| August | 0.2 | 13 | 53.8 | |
| September | 0.2 | 8.5 | 40 | |
| October | 4.2 | 20 | 61.1 | |
| November | 15.7 | 46.1 | 197.7 | |
| December | 32.3 | 97.5 | 957.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Cosumnes River A Michigan Bar, CA normally run highest?
- April, on the long-term record. The median daily flow that month is about 833.9 cfs, against 8.5 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 Cosumnes River A Michigan Bar, CA?
- It depends on the month. In January, half of days historically fall near 250.9 cfs, with the middle 80% of days between 53.3 and 2,359.4 cfs. The month-by-month table on this page gives the full range.
- How long has Cosumnes River A Michigan Bar, CA been measured?
- Discharge records at USGS site 11335000 begin in 1907, about 119 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Cosumnes River A Michigan Bar, CA?
- The gauge sits at 38.50017, -121.04519, in California, in hydrologic subbasin 18040013, at an elevation of about 171 feet, draining roughly 536 square miles.
- Can I use Cosumnes River A Michigan Bar, 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.