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

41°F

5°C

Humidity 99%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 25 Dec 03:52 AM PST
Extended Forecast for

14 Miles S Murphy OR

Wind Advisory December 25, 09:00am until December 25, 01:00pm
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: Showers. Snow level 5100 feet. Low around 37. South southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Showers

  • Christmas Day

    Christmas Day: Rain and snow showers, mainly before 3pm. Snow level 4100 feet. High near 40. South wind 10 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow showers. Snow level 3800 feet. Low around 35. South wind 8 to 11 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Rain/Snow

  • Friday

    Friday: Rain and snow. Snow level 3700 feet. High near 38. Southwest wind around 10 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow

  • Friday Night

    Friday Night: Rain and snow, becoming all snow after 7pm. Low around 31. West southwest wind 5 to 7 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Snow
    then Chance
    Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 35. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow

  • Saturday Night

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

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers. Snow level 5100 feet. Low around 37. South southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Christmas Day
Rain and snow showers, mainly before 3pm. Snow level 4100 feet. High near 40. South wind 10 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Rain and snow showers. Snow level 3800 feet. Low around 35. South wind 8 to 11 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Rain and snow. Snow level 3700 feet. High near 38. Southwest wind around 10 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday Night
Rain and snow, becoming all snow after 7pm. Low around 31. West southwest wind 5 to 7 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 35. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 31.
Monday
Sunny, with a high near 45.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Sunny, with a high near 50.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles S Murphy OR
 42.15°N 123.34°W (Elev. 3570 ft)
Last Update:
3:41 am PST Dec 25, 2025
Forecast Valid:
4am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Chance of Precipitation