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

29°F

-2°C

Humidity 98%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 18 Jan 08:52 PM PST
Extended Forecast for

3 Miles SE Illinois Valley OR

Air Stagnation Advisory January 18, 09:10pm until January 21, 04:00pm
Freezing Fog Advisory until January 19, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 18, 09:10pm until January 21, 04:00pm
    Freezing Fog Advisory until January 19, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 27 °F

    Freezing Fog

  • M.L.King Day

    M.L.King Day: Patchy dense fog between 10am and 1pm. Widespread dense freezing fog before 10am.  Otherwise, sunny, with a high near 52. Light north wind.

    High: 52 °F

    Dense
    Freezing Fog
    and Patchy
    Dense Fog

  • Monday Night

    Monday Night: Patchy freezing fog. Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Patchy
    Freezing Fog

  • Tuesday

    Tuesday: Patchy fog between 10am and 1pm. Patchy freezing fog before 10am.  Otherwise, mostly sunny, with a high near 50. Calm wind.

    High: 50 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Patchy fog after 7pm.  Otherwise, mostly cloudy, with a low around 27. Light southeast wind.

    Low: 27 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 1pm.  Otherwise, partly sunny, with a high near 49.

    High: 49 °F

    Patchy Fog

  • Wednesday Night

    Wednesday Night: Patchy fog after 7pm.  Otherwise, partly cloudy, with a low around 28.

    Low: 28 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 1pm.  Otherwise, sunny, with a high near 50.

    High: 50 °F

    Patchy Fog

Detailed Forecast

Tonight
Widespread freezing fog, mainly after 1am. Mostly cloudy, with a low around 27. Calm wind.
M.L.King Day
Patchy dense fog between 10am and 1pm. Widespread dense freezing fog before 10am. Otherwise, sunny, with a high near 52. Light north wind.
Monday Night
Patchy freezing fog. Mostly clear, with a low around 27. Calm wind.
Tuesday
Patchy fog between 10am and 1pm. Patchy freezing fog before 10am. Otherwise, mostly sunny, with a high near 50. Calm wind.
Tuesday Night
Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 27. Light southeast wind.
Wednesday
Patchy fog before 1pm. Otherwise, partly sunny, with a high near 49.
Wednesday Night
Patchy fog after 7pm. Otherwise, partly cloudy, with a low around 28.
Thursday
Patchy fog before 1pm. Otherwise, sunny, with a high near 50.
Thursday Night
Mostly clear, with a low around 33.
Friday
A slight chance of rain. Snow level 4800 feet. Mostly sunny, with a high near 49.
Friday Night
A slight chance of rain. Snow level 4700 feet. Mostly cloudy, with a low around 34.
Saturday
A slight chance of rain. Snow level 4500 feet. Partly sunny, with a high near 50.
Saturday Night
A slight chance of rain. Snow level 4700 feet. Mostly cloudy, with a low around 34.
Sunday
A chance of rain. Snow level 4600 feet rising to 5100 feet in the afternoon. Partly sunny, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Illinois Valley OR
 42.08°N 123.65°W (Elev. 1644 ft)
6:46 pm PST Jan 18, 2026
9pm 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

National Digital Forecast Database