Rivermatics

USGS Streamgage 11466200

Santa Rosa C A Santa Rosa, CA

Santa Rosa C A Santa Rosa, CA is USGS streamgage 11466200 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 57 square miles. Discharge records at this site go back to 1939. Typical flow runs near 1 cfs in July and 28.3 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
57 sq mi
Gauge elevation
102 ft
Subbasin (HUC-8)
18010110
Coordinates
38.43654, -122.72467
USGS site number
11466200
Records begin
1939-10-01 (87 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 87 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 4.4 49.1 594.7
February 8.8 57.5 686.6
March 8.5 47.9 450.8
April 6 28.3 185.2
May — 21.8 —
June — 4.6 —
July — 1 —
August — 0.5 —
September — 0.4 —
October 0.1 0.9 23.5
November 0.3 3.4 72.8
December 1.3 33.4 569.3

All values in cubic feet per second (cfs).

Common questions

When does Santa Rosa C A Santa Rosa, CA normally run highest?
February, on the long-term record. The median daily flow that month is about 57.5 cfs, against 0.4 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 Santa Rosa C A Santa Rosa, CA?
It depends on the month. In January, half of days historically fall near 49.1 cfs, with the middle 80% of days between 4.4 and 594.7 cfs. The month-by-month table on this page gives the full range.
How long has Santa Rosa C A Santa Rosa, CA been measured?
Discharge records at USGS site 11466200 begin in 1939, about 87 years, covering roughly 5,274 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Santa Rosa C A Santa Rosa, CA?
The gauge sits at 38.43654, -122.72467, in California, in hydrologic subbasin 18010110, at an elevation of about 102 feet, draining roughly 57 square miles.
Can I use Santa Rosa C A Santa Rosa, 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