USGS Streamgage 11465680
Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA
Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA is USGS streamgage 11465680 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 41 square miles. Discharge records at this site go back to 1998. Typical flow runs near 0.4 cfs in July and 8.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 41 sq mi
- Gauge elevation
- 2 ft
- Subbasin (HUC-8)
- 18010110
- Coordinates
- 38.3521, -122.74412
- USGS site number
- 11465680
- Records begin
- 1998-11-06 (28 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 28 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 | 1.5 | 18.3 | 260.3 | |
| February | 3.8 | 21.1 | 349.8 | |
| March | 3.7 | 19.2 | 202.4 | |
| April | 2.1 | 8.5 | 57.1 | |
| May | 0.7 | 3.4 | 15.8 | |
| June | 0.1 | 1.2 | 4.3 | |
| July | 0 | 0.4 | 1.8 | |
| August | 0 | 0.2 | 1 | |
| September | 0 | 0.1 | 0.8 | |
| October | 0 | 0.3 | 14.3 | |
| November | 0.1 | 1.5 | 37.1 | |
| December | 0.4 | 9.2 | 261.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA normally run highest?
- February, on the long-term record. The median daily flow that month is about 21.1 cfs, against 0.1 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 Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA?
- It depends on the month. In January, half of days historically fall near 18.3 cfs, with the middle 80% of days between 1.5 and 260.3 cfs. The month-by-month table on this page gives the full range.
- How long has Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA been measured?
- Discharge records at USGS site 11465680 begin in 1998, about 28 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 Laguna de Santa Rosa A Stony Pt Rd near Cotati, CA?
- The gauge sits at 38.3521, -122.74412, in California, in hydrologic subbasin 18010110, at an elevation of about 2 feet, draining roughly 41 square miles.
- Can I use Laguna de Santa Rosa A Stony Pt Rd near Cotati, 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.