Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

49°F

9°C

Humidity 72%
Wind Speed ESE 2 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 21 Jan 12:52 PM PST
Extended Forecast for

17 Miles WNW Illinois Valley OR

Air Stagnation Advisory January 21, 01:29pm until January 23, 04:00pm
Freezing Fog Advisory January 21, 07:00pm until January 22, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 21, 01:29pm until January 23, 04:00pm

    NOW until 4:00pm Fri

    Air Stagnation Advisory

  • This Afternoon

    High: 54 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Light east northeast wind becoming northeast 6 to 11 mph in the evening.

    Low: 45 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 53. North wind 9 to 13 mph.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. North northeast wind 17 to 20 mph.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 47. Northeast wind 16 to 20 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 34. Breezy.

    Low: 34 °F

    Clear and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 49. Breezy.

    High: 49 °F

    Sunny and
    Breezy then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 54. Calm wind.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Light east northeast wind becoming northeast 6 to 11 mph in the evening.
Thursday
Sunny, with a high near 53. North wind 9 to 13 mph.
Thursday Night
Mostly clear, with a low around 40. North northeast wind 17 to 20 mph.
Friday
Sunny, with a high near 47. Northeast wind 16 to 20 mph.
Friday Night
Clear, with a low around 34. Breezy.
Saturday
Sunny, with a high near 49. Breezy.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Partly sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
A slight chance of showers. Snow level 5100 feet. Partly sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles WNW Illinois Valley OR
 42.18°N 123.98°W (Elev. 4344 ft)
12:41 pm PST Jan 21, 2026
1pm PST Jan 21, 2026-6pm PST Jan 27, 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