Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

37°F

3°C

Humidity 97%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 31 Jan 08:52 PM PST
Extended Forecast for

12 Miles NNE Happy Camp CA

  • Tonight

    Tonight: A slight chance of rain and snow between 2am and 4am, then a chance of snow.  Snow level 5900 feet lowering to 5200 feet after midnight . Mostly cloudy, with a low around 36. South southwest wind 14 to 16 mph.  Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow before 10am, then a slight chance of rain between 10am and 11am.  Snow level 5700 feet. Partly sunny, with a high near 42. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.  Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Southwest wind 6 to 8 mph.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. East southeast wind 6 to 9 mph becoming north in the afternoon.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Northeast wind 10 to 14 mph becoming east southeast after midnight.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of rain and snow between 2am and 4am, then a chance of snow. Snow level 5900 feet lowering to 5200 feet after midnight . Mostly cloudy, with a low around 36. South southwest wind 14 to 16 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
A chance of rain and snow before 10am, then a slight chance of rain between 10am and 11am. Snow level 5700 feet. Partly sunny, with a high near 42. Southwest wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly clear, with a low around 34. Southwest wind 6 to 8 mph.
Monday
Sunny, with a high near 49. East southeast wind 6 to 9 mph becoming north in the afternoon.
Monday Night
Mostly clear, with a low around 39. Northeast wind 10 to 14 mph becoming east southeast after midnight.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 53.
Friday Night
Partly cloudy, with a low around 40.
Saturday
A slight chance of rain. Snow level 6700 feet. Mostly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Happy Camp CA
 41.96°N 123.25°W (Elev. 5138 ft)
3:41 pm PST Jan 31, 2026
9pm PST Jan 31, 2026-6pm PST Feb 7, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database