Rivermatics

USGS Streamgage 11063510

Cajon C below Lone Pine C near Keenbrook, CA

Cajon C below Lone Pine C near Keenbrook, CA is USGS streamgage 11063510 in California, monitoring river discharge in hydrologic subbasin 18070203. It drains a watershed of about 57 square miles. Discharge records at this site go back to 1971. Typical flow runs near 3.7 cfs in July and 7.7 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
2,567 ft
Subbasin (HUC-8)
18070203
Coordinates
34.26334, -117.46699
USGS site number
11063510
Records begin
1971-10-01 (55 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 55 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 2.7 6.4 39.1
February 3 8.8 47.5
March 3.4 8.9 36
April 2.6 7.7 24
May 2.3 5.8 15.9
June 1.9 4.4 10.1
July 1.9 3.7 7.6
August 1.9 3.2 7.4
September 1.5 3.4 7.1
October 1.8 3.6 7.8
November 2 3.7 10.1
December 2.3 4.8 15.5

All values in cubic feet per second (cfs).

Common questions

When does Cajon C below Lone Pine C near Keenbrook, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 8.9 cfs, against 3.2 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Cajon C below Lone Pine C near Keenbrook, CA?
It depends on the month. In January, half of days historically fall near 6.4 cfs, with the middle 80% of days between 2.7 and 39.1 cfs. The month-by-month table on this page gives the full range.
How long has Cajon C below Lone Pine C near Keenbrook, CA been measured?
Discharge records at USGS site 11063510 begin in 1971, about 55 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 Cajon C below Lone Pine C near Keenbrook, CA?
The gauge sits at 34.26334, -117.46699, in California, in hydrologic subbasin 18070203, at an elevation of about 2,567 feet, draining roughly 57 square miles.
Can I use Cajon C below Lone Pine C near Keenbrook, 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