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

40°F

4°C

Humidity 97%
Wind Speed ESE 2 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 01 Feb 03:52 AM PST
Extended Forecast for

11 Miles NNE Happy Camp CA

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 5am.  Snow level 5400 feet. Mostly cloudy, with a low around 37. South wind around 9 mph.

    Low: 37 °F

    Chance Rain

  • Sunday

    Sunday: A 30 percent chance of rain, mainly before 10am.  Snow level 5800 feet. Partly sunny, with a high near 44. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 44 °F

    Chance Rain
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Light and variable wind becoming east southeast around 5 mph after midnight.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51. East northeast wind 3 to 5 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. East southeast wind around 5 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Snow level 5400 feet. Mostly cloudy, with a low around 37. South wind around 9 mph.
Sunday
A 30 percent chance of rain, mainly before 10am. Snow level 5800 feet. Partly sunny, with a high near 44. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 34. Light and variable wind becoming east southeast around 5 mph after midnight.
Monday
Sunny, with a high near 51. East northeast wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 39. East southeast wind around 5 mph.
Tuesday
Sunny, with a high near 56.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Sunny, with a high near 58.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 55.
Friday Night
Partly cloudy, with a low around 39.
Saturday
A slight chance of rain. Snow level 6500 feet. Mostly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNE Happy Camp CA
 41.94°N 123.25°W (Elev. 4360 ft)
3:41 am PST Feb 1, 2026
4am PST Feb 1, 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