Rivermatics

USGS Streamgage 11433930

Mormon Ravine near Newcastle, CA

Mormon Ravine near Newcastle, CA is USGS streamgage 11433930 in California, monitoring river discharge in hydrologic subbasin 18020128. It drains a watershed of about 4 square miles. Discharge records at this site go back to 1989. Typical flow runs near 9.5 cfs in July and 11.9 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
4 sq mi
Gauge elevation
500 ft
Subbasin (HUC-8)
18020128
Coordinates
38.83657, -121.09439
USGS site number
11433930
Records begin
1989-10-01 (37 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 36 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 7.3 11.7 22.4
February — 12.9 —
March — 12.5 —
April 4.4 11.9 25.4
May 6.2 10.1 19.2
June 6.2 8.4 24.1
July 6.1 9.5 25.7
August 6.4 10.2 24.9
September 6.2 7.4 24.2
October 2.7 4.9 10.4
November 1.1 4.5 11.4
December 5.9 7.7 18.4

All values in cubic feet per second (cfs).

Common questions

When does Mormon Ravine near Newcastle, CA normally run highest?
February, on the long-term record. The median daily flow that month is about 12.9 cfs, against 4.5 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 Mormon Ravine near Newcastle, CA?
It depends on the month. In January, half of days historically fall near 11.7 cfs, with the middle 80% of days between 7.3 and 22.4 cfs. The month-by-month table on this page gives the full range.
How long has Mormon Ravine near Newcastle, CA been measured?
Discharge records at USGS site 11433930 begin in 1989, about 37 years, covering roughly 2,472 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Mormon Ravine near Newcastle, CA?
The gauge sits at 38.83657, -121.09439, in California, in hydrologic subbasin 18020128, at an elevation of about 500 feet, draining roughly 4 square miles.
Can I use Mormon Ravine near Newcastle, 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