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

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

39°F

4°C

Humidity 98%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 24 Dec 08:52 PM PST
Extended Forecast for

Happy Camp CA

Wind Advisory December 25, 01:00am until December 25, 01:00pm
Winter Storm Warning December 24, 09:30pm until December 26, 10:00am
Click here for hazard details and duration
Wind Advisory
Winter Storm Warning
  •  
    Winter Storm Warning December 24, 09:30pm until December 26, 10:00am

    NOW until 10:00am Fri

    Winter Storm Warning

  • Tonight

    Low: 39 °F

    Rain Likely
    then Rain

  • Christmas Day

    Christmas Day: Rain, mainly before 3pm. Snow level 4100 feet. High near 47. East southeast wind 6 to 9 mph becoming south southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Snow level 3800 feet. Low around 37. East southeast wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Rain

  • Friday

    Friday: Rain. Snow level 3800 feet. High near 46. South southwest wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain

  • Friday Night

    Friday Night: Rain, mainly before 10pm. Snow level 3300 feet. Low around 32. Light northwest wind. Chance of precipitation is 80%.

    Low: 32 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: A slight chance of rain and snow before 10am, then a slight chance of rain. Snow level 2600 feet rising to 3300 feet in the afternoon. Mostly sunny, with a high near 44. Chance of precipitation is 20%.

    High: 44 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

Detailed Forecast

Tonight
Rain. Low around 39. East northeast wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Christmas Day
Rain, mainly before 3pm. Snow level 4100 feet. High near 47. East southeast wind 6 to 9 mph becoming south southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain. Snow level 3800 feet. Low around 37. East southeast wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. Snow level 3800 feet. High near 46. South southwest wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain, mainly before 10pm. Snow level 3300 feet. Low around 32. Light northwest wind. Chance of precipitation is 80%.
Saturday
A slight chance of rain and snow before 10am, then a slight chance of rain. Snow level 2600 feet rising to 3300 feet in the afternoon. Mostly sunny, with a high near 44. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Mostly clear, with a low around 31.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Happy Camp CA
 41.81°N 123.36°W (Elev. 1299 ft)
Last Update:
5:21 pm PST Dec 24, 2025
Forecast Valid:
9pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation