Rivermatics

USGS Streamgage 11073495

Cucamonga C near Mira Loma, CA

Cucamonga C near Mira Loma, CA is USGS streamgage 11073495 in California, monitoring river discharge in hydrologic subbasin 18070203. It drains a watershed of about 76 square miles. Discharge records at this site go back to 1968. Typical flow runs near 24.1 cfs in July and 31.9 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.

View live conditions & forecast →

Gauge details

State
California
Drainage area
76 sq mi
Gauge elevation
641 ft
Subbasin (HUC-8)
18070203
Coordinates
33.98279, -117.5995
USGS site number
11073495
Records begin
1968-02-01 (58 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Cucamonga C near Mira Loma, 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
137 223 292
47.3 191 281
29.2 163 252
20.2 141 234
17.4 121 209
15.9 110 195
15 101 186
13.1 93.6 177
12.8 85.2 165
11.1 78.2 156
9.3 66.5 143
8.3 57.5 133
7.5 49.3 124
9.4 53.5 123

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 41 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 17.6 41.2 186.1
February 16.2 43.1 249.6
March 15.6 39.6 142.4
April 9.5 31.9 70
May 7.7 26.8 56.1
June 4 25.7 51.2
July 2.6 24.1 49.1
August 2.9 23.6 46.2
September 4.3 27.4 48.9
October 6.6 30.1 53.4
November 10.1 31.2 72.7
December 16.2 38.5 114.6

All values in cubic feet per second (cfs).

Common questions

When does Cucamonga C near Mira Loma, CA normally run highest?
February, on the long-term record. The median daily flow that month is about 43.1 cfs, against 23.6 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Cucamonga C near Mira Loma, CA?
It depends on the month. In January, half of days historically fall near 41.2 cfs, with the middle 80% of days between 17.6 and 186.1 cfs. The month-by-month table on this page gives the full range.
How long has Cucamonga C near Mira Loma, CA been measured?
Discharge records at USGS site 11073495 begin in 1968, about 58 years, covering roughly 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Cucamonga C near Mira Loma, 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 Cucamonga C near Mira Loma, CA?
The gauge sits at 33.98279, -117.5995, in California, in hydrologic subbasin 18070203, at an elevation of about 641 feet, draining roughly 76 square miles.
Can I use Cucamonga C near Mira Loma, 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