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

37°F

3°C

Humidity 98%
Wind Speed SSE 1 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 21 Jan 10:52 AM PST
Extended Forecast for

Illinois Valley OR

Air Stagnation Advisory January 21, 11:37am until January 23, 04:00pm
Freezing Fog Advisory January 21, 11:37am until January 21, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 21, 11:37am until January 23, 04:00pm
    Freezing Fog Advisory January 21, 11:37am until January 21, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Today

    High: 55 °F

    Patchy Fog

  • Tonight

    Tonight: Patchy dense fog.  Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Patchy Dense
    Fog

  • Thursday

    Thursday: Areas of fog before 10am.  Otherwise, sunny, with a high near 52. North northeast wind 3 to 5 mph.

    High: 52 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. Northeast wind 3 to 5 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50. North northeast wind around 6 mph.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy fog after 4pm. Otherwise, partly sunny, with a high near 55. Calm wind.
Tonight
Patchy dense fog. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 28. Calm wind.
Thursday
Areas of fog before 10am. Otherwise, sunny, with a high near 52. North northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 27. Northeast wind 3 to 5 mph.
Friday
Sunny, with a high near 50. North northeast wind around 6 mph.
Friday Night
Mostly clear, with a low around 27.
Saturday
Sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Partly sunny, with a high near 51.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Mostly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
Partly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.09°N 123.68°W (Elev. 1394 ft)
9:46 am PST Jan 21, 2026
11am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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