Rivermatics

USGS Streamgage 11465750

Laguna de Santa Rosa C near Sebastopol, CA

Laguna de Santa Rosa C near Sebastopol, CA is USGS streamgage 11465750 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 80 square miles. Discharge records at this site go back to 1998. Typical flow runs near 0.5 cfs in July and 21.5 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
80 sq mi
Gauge elevation
0 ft
Subbasin (HUC-8)
18010110
Coordinates
38.42547, -122.82916
USGS site number
11465750
Records begin
1998-11-18 (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.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 4 62.4 701.1
February 7.8 69.3 826.7
March 6.8 69.4 456.6
April 4.3 21.5 155.4
May 1.2 6.3 38.8
June 0.2 1.7 7.1
July 0 0.5 2.8
August 0 0.1 1.3
September 0 0 1
October 0 0.2 17.5
November 0.1 4.3 95.4
December 1.9 43.5 612.4

All values in cubic feet per second (cfs).

Common questions

When does Laguna de Santa Rosa C near Sebastopol, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 69.4 cfs, against 0 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 C near Sebastopol, CA?
It depends on the month. In January, half of days historically fall near 62.4 cfs, with the middle 80% of days between 4 and 701.1 cfs. The month-by-month table on this page gives the full range.
How long has Laguna de Santa Rosa C near Sebastopol, CA been measured?
Discharge records at USGS site 11465750 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 C near Sebastopol, CA?
The gauge sits at 38.42547, -122.82916, in California, in hydrologic subbasin 18010110, at an elevation of about 0 feet, draining roughly 80 square miles.
Can I use Laguna de Santa Rosa C near Sebastopol, 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.

Other gauges in this subbasin