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

7 Miles SW Illinois Valley OR

Air Stagnation Advisory January 19, 12:34pm 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, 12:34pm until January 21, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • M.L.King Day

    High: 52 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. North northeast wind around 6 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52. Light east southeast wind.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. East southeast wind 3 to 6 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. East wind around 6 mph becoming calm  in the morning.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °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 35.

    Low: 35 °F

    Mostly Clear

Detailed Forecast

M.L.King Day
Sunny, with a high near 52. Northeast wind around 6 mph.
Tonight
Mostly clear, with a low around 39. North northeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 52. Light east southeast wind.
Tuesday Night
Mostly cloudy, with a low around 40. East southeast wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 50. East wind around 6 mph becoming calm in the morning.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 35.
Friday
Sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
A chance of rain. Snow level 5300 feet. Mostly cloudy, with a low around 37.
Sunday
A chance of rain. Snow level 5300 feet. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SW Illinois Valley OR
 42.03°N 123.78°W (Elev. 2428 ft)
11:51 am PST Jan 19, 2026
12pm 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