Rivermatics

USGS Streamgage 11300500

S San Joaquin Cn near Knights Ferry, CA

S San Joaquin Cn near Knights Ferry, CA is USGS streamgage 11300500 in California, monitoring river discharge in hydrologic subbasin 18040010. Discharge records at this site go back to 1914. Typical flow runs near 961.8 cfs in July and 742.7 cfs in April, with the higher of the two arriving in July.

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Gauge details

State
California
Subbasin (HUC-8)
18040010
Coordinates
37.85437, -120.63826
USGS site number
11300500
Records begin
1914-05-01 (112 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 112 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 0.5 286.1
February 0 1 441.9
March 0.2 192.4 725.2
April 158.4 742.7 1,073.1
May 541.8 899.4 1,166.8
June 653.7 947.8 1,186.7
July 556.8 961.8 1,181.3
August 239 865.5 1,123.5
September 148.2 563.1 837.1
October 2.4 103.1 371.9
November 0 1.5 168.8
December 0 0.5 42.3

All values in cubic feet per second (cfs).

Common questions

When does S San Joaquin Cn near Knights Ferry, CA normally run highest?
July, on the long-term record. The median daily flow that month is about 961.8 cfs, against 0.5 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 S San Joaquin Cn near Knights Ferry, CA?
It depends on the month. In January, half of days historically fall near 0.5 cfs, with the middle 80% of days between 0 and 286.1 cfs. The month-by-month table on this page gives the full range.
How long has S San Joaquin Cn near Knights Ferry, CA been measured?
Discharge records at USGS site 11300500 begin in 1914, about 112 years, covering roughly 8,457 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is S San Joaquin Cn near Knights Ferry, CA?
The gauge sits at 37.85437, -120.63826, in California, in hydrologic subbasin 18040010.
Can I use S San Joaquin Cn near Knights Ferry, 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