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

Heavy lake effect snow will continue in the Great Lakes into Wednesday before another storm brings a widespread general snow followed by another round of heavy lake effect snow. A wide-ranging winter storm will produce great swaths of heavy snow, sleet, and treacherous freezing rain from the southern Rockies/Plains and Mid-South starting Friday and shifting toward the East Coast through Sunday. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

34°F

1°C

Humidity 96%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 20 Jan 10:52 AM PST
Extended Forecast for

14 Miles SE Agness OR

Air Stagnation Advisory January 20, 11:45am until January 21, 04:00pm
Freezing Fog Advisory January 20, 07:00pm until January 21, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 20, 11:45am until January 21, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • Today

    High: 58 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Calm wind becoming east southeast around 5 mph after midnight.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 56. Light and variable wind.

    High: 56 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Light east northeast wind.

    Low: 45 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 54. North northeast wind 3 to 5 mph.

    High: 54 °F

    Sunny

  • Thursday Night

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

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Today
Partly sunny, with a high near 58. Light southeast wind.
Tonight
Mostly cloudy, with a low around 49. Calm wind becoming east southeast around 5 mph after midnight.
Wednesday
Mostly cloudy, with a high near 56. Light and variable wind.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Light east northeast wind.
Thursday
Sunny, with a high near 54. North northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 40.
Friday
Sunny, with a high near 50.
Friday Night
Mostly clear, with a low around 36.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
A slight chance of rain after 10pm. Snow level 5200 feet. Mostly cloudy, with a low around 42.
Sunday
A chance of rain. Snow level 5200 feet. Mostly cloudy, with a high near 52.
Sunday Night
A chance of rain. Snow level 5500 feet. Mostly cloudy, with a low around 43.
Monday
A slight chance of rain. Snow level 5500 feet. Partly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
14 Miles SE Agness OR
 42.42°N 123.87°W (Elev. 2461 ft)
11:11 am PST Jan 20, 2026
11am PST Jan 20, 2026-6pm PST Jan 26, 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