Rivermatics

USGS Streamgage 11123000

Santa Ynez River below Gibraltar Dam near Santa Barbara, CA

Santa Ynez River below Gibraltar Dam near Santa Barbara, CA is USGS streamgage 11123000 in California, monitoring river discharge in hydrologic subbasin 18060010. It drains a watershed of about 216 square miles. Discharge records at this site go back to 1933. Typical flow runs near 0.4 cfs in July and 12.6 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
216 sq mi
Gauge elevation
1,229 ft
Subbasin (HUC-8)
18060010
Coordinates
34.52443, -119.68732
USGS site number
11123000
Records begin
1933-10-01 (93 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 93 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 0 0 192.8
February 0 6.1 539.4
March 0 19.9 637.4
April 0 12.6 294
May 0 1.4 89.1
June 0 0.2 26.1
July 0 0.4 9.8
August 0 0.1 5.8
September 0 0 1.2
October 0 0 0.5
November 0 0 0.5
December 0 0 22.5

All values in cubic feet per second (cfs).

Common questions

When does Santa Ynez River below Gibraltar Dam near Santa Barbara, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 19.9 cfs, against 0 cfs in January, 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 Ynez River below Gibraltar Dam near Santa Barbara, CA?
It depends on the month. In January, half of days historically fall near 0 cfs, with the middle 80% of days between 0 and 192.8 cfs. The month-by-month table on this page gives the full range.
How long has Santa Ynez River below Gibraltar Dam near Santa Barbara, CA been measured?
Discharge records at USGS site 11123000 begin in 1933, about 93 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 Santa Ynez River below Gibraltar Dam near Santa Barbara, CA?
The gauge sits at 34.52443, -119.68732, in California, in hydrologic subbasin 18060010, at an elevation of about 1,229 feet, draining roughly 216 square miles.
Can I use Santa Ynez River below Gibraltar Dam near Santa Barbara, 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