Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

26°F

-3°C

Humidity 98%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 20 Jan 01:52 AM PST
Extended Forecast for

16 Miles SE Agness OR

Air Stagnation Advisory January 20, 02:28am until January 21, 04:00pm
Freezing Fog Advisory January 20, 02:28am until January 20, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 20, 02:28am until January 21, 04:00pm
    Freezing Fog Advisory January 20, 02:28am until January 20, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 57. East wind around 5 mph becoming calm  in the morning.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. East wind 3 to 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 54. Light and variable wind.

    High: 54 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. Light east northeast wind.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Thursday Night

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

    Low: 39 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 48. East wind around 7 mph.
Tuesday
Partly sunny, with a high near 57. East wind around 5 mph becoming calm in the morning.
Tuesday Night
Mostly cloudy, with a low around 48. East wind 3 to 5 mph.
Wednesday
Mostly cloudy, with a high near 54. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 44. Light east northeast wind.
Thursday
Sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 39.
Friday
Sunny, with a high near 49.
Friday Night
Mostly clear, with a low around 35.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
A slight chance of rain. Snow level 5300 feet. Mostly cloudy, with a low around 41.
Sunday
A chance of rain. Snow level 5200 feet. Mostly cloudy, with a high near 51.
Sunday Night
A chance of rain. Snow level 5500 feet. Mostly cloudy, with a low around 42.
Monday
A slight chance of rain. Snow level 5500 feet. Mostly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles SE Agness OR
 42.4°N 123.83°W (Elev. 2582 ft)
2:21 am PST Jan 20, 2026
2am PST Jan 20, 2026-6pm PST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database