Rivermatics

USGS Streamgage 11526250

Trinity River A Junction City, CA

Trinity River A Junction City, CA is USGS streamgage 11526250 in California, monitoring river discharge in hydrologic subbasin 18010211. It drains a watershed of about 1,057 square miles. Discharge records at this site go back to 2002. Typical flow runs near 757.1 cfs in July and 1,145.7 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
1,057 sq mi
Gauge elevation
1,445 ft
Subbasin (HUC-8)
18010211
Coordinates
40.72848, -123.06197
USGS site number
11526250
Records begin
2002-10-01 (24 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 24 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 396.1 739.6 2,997.4
February 410.1 796 3,774.3
March 414.2 909.9 2,979.7
April 528.1 1,145.7 5,082.7
May 1,316.1 2,993.2 6,173.9
June 638.5 1,813 2,996.3
July 443.4 757.1 1,424.2
August 444 530 1,027.5
September 458.3 511.7 973.4
October 369.5 411.7 503.4
November 324.6 370.1 515.9
December 360.7 480.5 1,828.2

All values in cubic feet per second (cfs).

Common questions

When does Trinity River A Junction City, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 2,993.2 cfs, against 370.1 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Trinity River A Junction City, CA?
It depends on the month. In January, half of days historically fall near 739.6 cfs, with the middle 80% of days between 396.1 and 2,997.4 cfs. The month-by-month table on this page gives the full range.
How long has Trinity River A Junction City, CA been measured?
Discharge records at USGS site 11526250 begin in 2002, about 24 years, covering roughly 8,706 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Trinity River A Junction City, CA?
The gauge sits at 40.72848, -123.06197, in California, in hydrologic subbasin 18010211, at an elevation of about 1,445 feet, draining roughly 1,057 square miles.
Can I use Trinity River A Junction City, 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