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

35°F

2°C

Humidity 97%
Wind Speed W 0 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 18 Jan 06:52 PM PST
Extended Forecast for

17 Miles SSE Agness OR

Air Stagnation Advisory January 18, 07:53pm until January 21, 04:00pm
Freezing Fog Advisory January 18, 08:00pm until January 19, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 18, 07:53pm until January 21, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • Tonight

    Low: 51 °F

    Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 62. East wind around 6 mph becoming calm  in the morning.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. East wind 3 to 6 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Light and variable wind.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. East southeast wind around 6 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 51. East northeast wind around 6 mph.
M.L.King Day
Sunny, with a high near 62. East wind around 6 mph becoming calm in the morning.
Monday Night
Mostly clear, with a low around 50. East wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 61. Light and variable wind.
Tuesday Night
Mostly cloudy, with a low around 49. East southeast wind around 6 mph.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Sunny, with a high near 53.
Thursday Night
A slight chance of rain after 10pm. Snow level 5000 feet. Partly cloudy, with a low around 37.
Friday
A chance of rain. Snow level 4800 feet. Partly sunny, with a high near 49.
Friday Night
A chance of rain. Snow level 4600 feet. Mostly cloudy, with a low around 39.
Saturday
A chance of rain and snow. Snow level 4400 feet. Partly sunny, with a high near 49.
Saturday Night
A chance of rain and snow. Snow level 4700 feet. Mostly cloudy, with a low around 40.
Sunday
A chance of rain and snow. Snow level 4800 feet. Partly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
6:46 pm PST Jan 18, 2026
7pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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