Rivermatics

USGS Streamgage 11427000

NF American River A North Fork Dam, CA

NF American River A North Fork Dam, CA is USGS streamgage 11427000 in California, monitoring river discharge in hydrologic subbasin 18020128. It drains a watershed of about 342 square miles. Discharge records at this site go back to 1941. Typical flow runs near 113.1 cfs in July and 1,398.3 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
342 sq mi
Gauge elevation
717 ft
Subbasin (HUC-8)
18020128
Coordinates
38.93599, -121.0238
USGS site number
11427000
Records begin
1941-10-01 (85 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 85 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 108.6 509.9 3,205.2
February 253.6 806 3,010
March 485.4 1,134.3 2,985.8
April 665.8 1,398.3 2,809
May 445.9 1,349.4 2,952.9
June 130.9 490.8 1,714.2
July 47.8 113.1 354.9
August 29.7 56.3 107.1
September 26.4 46.4 76.2
October 30.5 52.9 128.3
November 47.6 97.2 636.8
December 73.5 242.2 1,974.2

All values in cubic feet per second (cfs).

Common questions

When does NF American River A North Fork Dam, CA normally run highest?
April, on the long-term record. The median daily flow that month is about 1,398.3 cfs, against 46.4 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for NF American River A North Fork Dam, CA?
It depends on the month. In January, half of days historically fall near 509.9 cfs, with the middle 80% of days between 108.6 and 3,205.2 cfs. The month-by-month table on this page gives the full range.
How long has NF American River A North Fork Dam, CA been measured?
Discharge records at USGS site 11427000 begin in 1941, about 85 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 NF American River A North Fork Dam, CA?
The gauge sits at 38.93599, -121.0238, in California, in hydrologic subbasin 18020128, at an elevation of about 717 feet, draining roughly 342 square miles.
Can I use NF American River A North Fork Dam, 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