Rivermatics

USGS Streamgage 11273400

San Joaquin River Ab Merced River near Newman, CA

San Joaquin River Ab Merced River near Newman, CA is USGS streamgage 11273400 in California, monitoring river discharge in hydrologic subbasin 18040001. It drains a watershed of about 7,949 square miles. Discharge records at this site go back to 2009. Typical flow runs near 145.8 cfs in July and 418.1 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
7,949 sq mi
Gauge elevation
3 ft
Subbasin (HUC-8)
18040001
Coordinates
37.34719, -120.97614
USGS site number
11273400
Records begin
2009-01-21 (17 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 17 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 185.9 431.5 1,146.7
February 199.1 473.1 1,496.9
March 179.8 632.4 1,756.1
April 128.4 418.1 1,179.7
May 61.6 241.2 1,250.9
June 29.6 175.5 1,276.1
July 23.2 145.8 797.4
August 20.8 157.5 392.5
September 16.8 160.4 424.3
October 28 237.4 472.3
November 66.6 273 565.3
December 157.2 369.4 935.6

All values in cubic feet per second (cfs).

Common questions

When does San Joaquin River Ab Merced River near Newman, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 632.4 cfs, against 145.8 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for San Joaquin River Ab Merced River near Newman, CA?
It depends on the month. In January, half of days historically fall near 431.5 cfs, with the middle 80% of days between 185.9 and 1,146.7 cfs. The month-by-month table on this page gives the full range.
How long has San Joaquin River Ab Merced River near Newman, CA been measured?
Discharge records at USGS site 11273400 begin in 2009, about 17 years, covering roughly 6,017 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is San Joaquin River Ab Merced River near Newman, CA?
The gauge sits at 37.34719, -120.97614, in California, in hydrologic subbasin 18040001, at an elevation of about 3 feet, draining roughly 7,949 square miles.
Can I use San Joaquin River Ab Merced River near Newman, 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