Rivermatics

USGS Streamgage 11466800

Mark West C near Mirabel Heights, CA

Mark West C near Mirabel Heights, CA is USGS streamgage 11466800 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 251 square miles. Discharge records at this site go back to 2005. Typical flow runs near 2.9 cfs in July and 105.3 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
California
Drainage area
251 sq mi
Gauge elevation
2 ft
Subbasin (HUC-8)
18010110
Coordinates
38.49404, -122.85329
USGS site number
11466800
Records begin
2005-10-01 (21 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Mark West C near Mirabel Heights, CA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
0.8 0.9 1
0.8 0.9 1
0.7 0.9 1
0.7 0.8 1
0.7 0.8 1
0.6 0.8 1
0.6 0.8 1
0.6 0.7 0.9
0.5 0.7 0.9
0.5 0.7 0.9
0.5 0.7 1
0.5 0.8 1.1
0.5 0.7 1.1
0.5 0.7 1.1

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 21 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 14.6 183.8 2,647.2
February 35.1 160 3,090
March 31.6 156.6 2,240.6
April 24.2 105.3 681.9
May 10.8 36 95.4
June 3.9 10.2 36.9
July 0.5 2.9 11
August 0 0.9 4.4
September 0 0.6 2.7
October 0 2 71
November 2 19 211.6
December 10.4 131.1 1,884.4

All values in cubic feet per second (cfs).

Common questions

When does Mark West C near Mirabel Heights, CA normally run highest?
January, on the long-term record. The median daily flow that month is about 183.8 cfs, against 0.6 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 Mark West C near Mirabel Heights, CA?
It depends on the month. In January, half of days historically fall near 183.8 cfs, with the middle 80% of days between 14.6 and 2,647.2 cfs. The month-by-month table on this page gives the full range.
How long has Mark West C near Mirabel Heights, CA been measured?
Discharge records at USGS site 11466800 begin in 2005, about 21 years, covering roughly 7,136 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Mark West C near Mirabel Heights, CA?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Mark West C near Mirabel Heights, CA?
The gauge sits at 38.49404, -122.85329, in California, in hydrologic subbasin 18010110, at an elevation of about 2 feet, draining roughly 251 square miles.
Can I use Mark West C near Mirabel Heights, 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