CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

LYTLE CREEK - COLTON (YTLC1)

Latitude: 34.08º N	Longitude: 117.30º W	Elevation: 975 Feet
Location: San Bernardino County in California		Bulletin Group: Southern California		River Group: Southern California

Issuance Time:

Nov 17 2025 at 1:47 PM PST

Next Issuance:

Nov 18 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: N/A

Moderate Flood: N/A

Major Flood: N/A

Plot Type:

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ048)

Tonight: Showers this evening, then showers and a slight chance of thunderstorms overnight. Locally heavy rainfall possible this evening. Lows 42 to 47. Areas of winds south 10 to 15 mph becoming southwest overnight.

Tuesday: Partly cloudy with a chance of showers and a slight chance of thunderstorms. Highs 55 to 60. Light winds. Chance of measurable precipitation 50 percent.

Tuesday Night: Partly cloudy. A chance of showers. Lows 37 to 44. Light winds. Chance of measurable precipitation 30 percent.

Wednesday: Partly cloudy in the morning and becoming mostly sunny. Highs 57 to 62. Light winds.

Wednesday Night: Mostly clear in the evening and becoming partly cloudy. Lows 39 to 45. Light winds.

Thursday: Partly cloudy. A slight chance of showers in the afternoon. Highs 55 to 61.

Thursday Night: Mostly cloudy. A chance of showers in the evening, then showers likely overnight. Lows 44 to 48.

Friday: Mostly cloudy in the morning and becoming partly cloudy. A chance of showers. Highs 56 to 62.

Friday Night: Partly cloudy. A chance of showers. Lows 42 to 47.

Saturday: Partly cloudy with a slight chance of showers. Highs 62 to 68.

Saturday Night: Partly cloudy with a slight chance of showers. Lows 43 to 48.

Sunday: Mostly sunny. Highs 64 to 69.

Sunday Night: Mostly clear. Lows 43 to 48.

Monday: Mostly sunny. Highs 66 to 71.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS San Diego Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.