National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

KNOXVILLE CREEK (KNXC1)

Lat: 38.86194°NLon: 122.41722°WElev: 2200.0ft.

NA

43°F

6°C

Humidity 96%
Wind Speed SSW 13 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Wind Chill36°F (2°C)
Last update 26 Dec 03:09 AM PST
Extended Forecast for

Hidden Valley Lake CA

Flood Watch December 26, 04:00am until December 26, 10:00pm
Wind Advisory December 26, 04:00am until December 26, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 26, 04:00am until December 26, 10:00pm
    Wind Advisory December 26, 04:00am until December 26, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 42 °F

    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm. High near 49. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 49 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South southeast wind 8 to 11 mph becoming east after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 37 °F

    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Sunny, with a high near 50. North wind 3 to 6 mph.

    High: 50 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. North wind around 6 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 53. North northeast wind around 6 mph.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

Overnight
Showers. Low around 42. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers, with thunderstorms also possible after 4pm. High near 49. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South southeast wind 8 to 11 mph becoming east after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers before 10am. Sunny, with a high near 50. North wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 34. North wind around 6 mph.
Sunday
Sunny, with a high near 53. North northeast wind around 6 mph.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 57.
Monday Night
Clear, with a low around 36.
Tuesday
Sunny, with a high near 58.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
New Year's Day
A chance of rain. Mostly cloudy, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hidden Valley Lake CA
 38.82°N 122.54°W (Elev. 1781 ft)
Last Update:
1:10 am PST Dec 26, 2025
Forecast Valid:
4am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation