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

37°F

3°C

Humidity 98%
Wind Speed E 1 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 19 Jan 11:52 AM PST
Extended Forecast for

17 Miles SSE Agness OR

Air Stagnation Advisory January 19, 12:33pm until January 21, 04:00pm
Freezing Fog Advisory January 19, 08:00pm until January 20, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 19, 12:33pm until January 21, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • M.L.King Day

    High: 61 °F

    Sunny

  • Tonight

    Tonight: 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. East wind around 6 mph becoming light and variable  in the afternoon.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain after 10pm.  Snow level 5200 feet. Partly cloudy, with a low around 37.

    Low: 37 °F

    Slight Chance
    Rain

Detailed Forecast

M.L.King Day
Sunny, with a high near 61. Light north wind.
Tonight
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. East wind around 6 mph becoming light and variable in the afternoon.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
A slight chance of rain after 10pm. Snow level 5200 feet. Partly cloudy, with a low around 37.
Friday
A slight chance of rain before 10am. Snow level 4900 feet. Mostly sunny, with a high near 49.
Friday Night
A slight chance of rain between 10pm and 4am. Snow level 5000 feet. Partly cloudy, with a low around 39.
Saturday
A slight chance of rain. Snow level 4900 feet. Mostly sunny, with a high near 52.
Saturday Night
A chance of rain. Snow level 5200 feet. Mostly cloudy, with a low around 41.
Sunday
A chance of rain. Snow level 5200 feet. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
11:51 am PST Jan 19, 2026
12pm PST Jan 19, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

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