Rivermatics

USGS Streamgage 11062402

Lytle C Surface Diversion near Fontana, CA

Lytle C Surface Diversion near Fontana, CA is USGS streamgage 11062402 in California, monitoring river discharge in hydrologic subbasin 18070203. Discharge records at this site go back to 1971. Typical flow runs near 0 cfs in July and 1.2 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
Gauge elevation
2,240 ft
Subbasin (HUC-8)
18070203
Coordinates
34.20306, -117.44949
USGS site number
11062402
Records begin
1971-12-01 (55 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Lytle C Surface Diversion near Fontana, 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
18.9 20.2 21.2
17.5 19.8 21.6
16.1 19 21.3
15 18.6 21.2
13.9 18.1 21.2
13.3 17.8 21.4
12.6 17.5 21.4
11.9 17.2 21.4
11.4 16.9 21.4
11.2 16.8 21.8
10.8 16.7 21.9
10.7 16.6 22.3
10.6 16.7 22.6
10.2 16.5 22.7

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 54 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 0 0 12
February 0 0.4 15.3
March 0 1.4 18.7
April 0 1.2 23.9
May 0 0.2 26.7
June 0 0.1 23.1
July 0 0 20.7
August 0 0 21.9
September 0 0 22.6
October 0 0 20.6
November 0 0 13.9
December 0 0 10.7

All values in cubic feet per second (cfs).

Common questions

When does Lytle C Surface Diversion near Fontana, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 1.4 cfs, against 0 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Lytle C Surface Diversion near Fontana, CA?
It depends on the month. In January, half of days historically fall near 0 cfs, with the middle 80% of days between 0 and 12 cfs. The month-by-month table on this page gives the full range.
How long has Lytle C Surface Diversion near Fontana, CA been measured?
Discharge records at USGS site 11062402 begin in 1971, about 55 years, covering roughly 7,617 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Lytle C Surface Diversion near Fontana, 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 Lytle C Surface Diversion near Fontana, CA?
The gauge sits at 34.20306, -117.44949, in California, in hydrologic subbasin 18070203, at an elevation of about 2,240 feet.
Can I use Lytle C Surface Diversion near Fontana, 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