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 NW 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 19 Jan 07:52 AM PST
Extended Forecast for

Illinois Valley OR

Air Stagnation Advisory January 19, 08:48am until January 21, 04:00pm
Freezing Fog Advisory January 19, 08:48am until January 19, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 19, 08:48am until January 21, 04:00pm
    Freezing Fog Advisory January 19, 08:48am until January 19, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • M.L.King Day

    High: 56 °F

    Freezing Fog
    and Patchy
    Fog

  • Tonight

    Tonight: Patchy dense freezing fog. Partly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Patchy Dense
    Freezing Fog

  • Tuesday

    Tuesday: Patchy fog between 10am and 1pm. Patchy freezing fog before 10am.  Otherwise, mostly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Patchy fog after 7pm.  Otherwise, mostly cloudy, with a low around 29. Light east southeast wind.

    Low: 29 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 1pm.  Otherwise, partly sunny, with a high near 52. Calm wind.

    High: 52 °F

    Patchy Fog

  • Wednesday Night

    Wednesday Night: Patchy fog after 7pm.  Otherwise, partly cloudy, with a low around 29.

    Low: 29 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 1pm.  Otherwise, sunny, with a high near 51.

    High: 51 °F

    Patchy Fog

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

M.L.King Day
Patchy fog between 10am and 1pm. Widespread freezing fog before 10am. Otherwise, sunny, with a high near 56. North northeast wind 3 to 5 mph.
Tonight
Patchy dense freezing fog. Partly cloudy, with a low around 29. Calm wind.
Tuesday
Patchy fog between 10am and 1pm. Patchy freezing fog before 10am. Otherwise, mostly sunny, with a high near 52. Calm wind.
Tuesday Night
Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 29. Light east southeast wind.
Wednesday
Patchy fog before 1pm. Otherwise, partly sunny, with a high near 52. Calm wind.
Wednesday Night
Patchy fog after 7pm. Otherwise, partly cloudy, with a low around 29.
Thursday
Patchy fog before 1pm. Otherwise, sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 34.
Friday
Mostly sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 35.
Sunday
A slight chance of rain. Partly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.11°N 123.69°W (Elev. 1398 ft)
3:41 am PST Jan 19, 2026
8am PST Jan 19, 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