Rivermatics

USGS Streamgage 11276600

Tuolumne River Ab Early Intake near Mather, CA

Tuolumne River Ab Early Intake near Mather, CA is USGS streamgage 11276600 in California, monitoring river discharge in hydrologic subbasin 18040009. It drains a watershed of about 484 square miles. Discharge records at this site go back to 1943. Typical flow runs near 140.7 cfs in July and 156.9 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
484 sq mi
Gauge elevation
2,406 ft
Subbasin (HUC-8)
18040009
Coordinates
37.87935, -119.94709
USGS site number
11276600
Records begin
1943-06-01 (83 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 56 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 42.5 72.2 290.1
February 48.3 97.6 316.3
March 51.4 120.7 369.3
April 48.6 156.9 1,141.5
May 64.5 351.1 3,993.9
June 80.8 734.8 5,238.7
July 78.6 140.7 2,830
August 79.2 129.3 226.8
September 59.9 86.6 116.8
October 37.6 54.2 73.8
November 38.4 59.5 89
December 41.2 60 155.9

All values in cubic feet per second (cfs).

Common questions

When does Tuolumne River Ab Early Intake near Mather, CA normally run highest?
June, on the long-term record. The median daily flow that month is about 734.8 cfs, against 54.2 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Tuolumne River Ab Early Intake near Mather, CA?
It depends on the month. In January, half of days historically fall near 72.2 cfs, with the middle 80% of days between 42.5 and 290.1 cfs. The month-by-month table on this page gives the full range.
How long has Tuolumne River Ab Early Intake near Mather, CA been measured?
Discharge records at USGS site 11276600 begin in 1943, about 83 years, covering roughly 9,073 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Tuolumne River Ab Early Intake near Mather, CA?
The gauge sits at 37.87935, -119.94709, in California, in hydrologic subbasin 18040009, at an elevation of about 2,406 feet, draining roughly 484 square miles.
Can I use Tuolumne River Ab Early Intake near Mather, 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