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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

46°F

8°C

Humidity 99%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 02 Jan 04:52 AM PST
Extended Forecast for

9 Miles WNW Illinois Valley OR

  • Overnight

    Overnight: A 30 percent chance of rain. Mostly cloudy, with a low around 44. South wind around 11 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Chance Rain

  • Friday

    Friday: A 40 percent chance of rain, mainly between 10am and 4pm. Snow level 7000 feet lowering to 6300 feet in the afternoon . Partly sunny, with a high near 48. South southeast wind 9 to 14 mph, with gusts as high as 29 mph.

    High: 48 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain. Snow level 6700 feet lowering to 5500 feet after midnight . Low around 41. South wind 14 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 41 °F

    Rain

  • Saturday

    Saturday: Rain. Snow level 5200 feet. High near 42. Breezy, with a south wind 17 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 42 °F

    Rain and
    Breezy

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could produce heavy rainfall. Snow level 5500 feet lowering to 4900 feet after midnight . Low around 38. Breezy, with a south southwest wind 20 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.

    Low: 38 °F

    Heavy Rain
    and Breezy

  • Sunday

    Sunday: Rain, possibly mixed with snow, becoming all rain after 10am. Snow level 4200 feet. High near 39. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 39 °F

    Rain/Snow
    then Rain

  • Sunday Night

    Sunday Night: Rain, possibly mixed with snow. Snow level 3900 feet. Low around 36. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain/Snow

  • Monday

    Monday: Rain and snow, mainly before 4pm. Snow level 3900 feet. Mostly cloudy, with a high near 39.

    High: 39 °F

    Rain/Snow

  • Monday Night

    Monday Night: A chance of rain and snow, mainly before 10pm. Snow level 4000 feet. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance
    Rain/Snow

Detailed Forecast

Overnight
A 30 percent chance of rain. Mostly cloudy, with a low around 44. South wind around 11 mph, with gusts as high as 20 mph.
Friday
A 40 percent chance of rain, mainly between 10am and 4pm. Snow level 7000 feet lowering to 6300 feet in the afternoon . Partly sunny, with a high near 48. South southeast wind 9 to 14 mph, with gusts as high as 29 mph.
Friday Night
Rain. Snow level 6700 feet lowering to 5500 feet after midnight . Low around 41. South wind 14 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Saturday
Rain. Snow level 5200 feet. High near 42. Breezy, with a south wind 17 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Saturday Night
Showers and possibly a thunderstorm before 1am, then rain after 1am. Some of the storms could produce heavy rainfall. Snow level 5500 feet lowering to 4900 feet after midnight . Low around 38. Breezy, with a south southwest wind 20 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Sunday
Rain, possibly mixed with snow, becoming all rain after 10am. Snow level 4200 feet. High near 39. Chance of precipitation is 100%. Little or no snow accumulation expected.
Sunday Night
Rain, possibly mixed with snow. Snow level 3900 feet. Low around 36. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday
Rain and snow, mainly before 4pm. Snow level 3900 feet. Mostly cloudy, with a high near 39.
Monday Night
A chance of rain and snow, mainly before 10pm. Snow level 4000 feet. Mostly cloudy, with a low around 33.
Tuesday
Rain likely, possibly mixed with snow, mainly after 4pm. Snow level 4100 feet. Mostly cloudy, with a high near 39.
Tuesday Night
Rain and snow. Snow level 4300 feet. Mostly cloudy, with a low around 35.
Wednesday
Rain and snow. Snow level 3400 feet. Mostly cloudy, with a high near 37.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 32.
Thursday
Snow likely. Partly sunny, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
Last Update:
3:41 am PST Jan 2, 2026
Forecast Valid:
5am PST Jan 2, 2026-6pm PST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation