Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

37°F

3°C

Humidity 90%
Wind Speed NE 3 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 27 Dec 06:52 PM PST
Extended Forecast for

2 Miles WSW Happy Camp CA

  • Tonight

    Tonight: Patchy fog between 8pm and 10pm. Widespread freezing fog after midnight.  Otherwise, mostly cloudy, with a low around 28. North wind around 5 mph.

    Low: 28 °F

    Freezing Fog
    and Patchy
    Fog

  • Sunday

    Sunday: Widespread freezing fog before 11am. Mostly sunny, with a high near 49. North wind around 6 mph.

    High: 49 °F

    Freezing Fog
    then Sunny

  • Sunday Night

    Sunday Night: Widespread freezing fog after 10pm. Partly cloudy, with a low around 30. Northeast wind around 7 mph.

    Low: 30 °F

    Freezing Fog

  • Monday

    Monday: Widespread freezing fog before 11am. Sunny, with a high near 53. East wind 3 to 6 mph.

    High: 53 °F

    Freezing Fog
    then Sunny

  • Monday Night

    Monday Night: Widespread freezing fog after 10pm. Mostly clear, with a low around 33. East wind around 6 mph.

    Low: 33 °F

    Freezing Fog

  • Tuesday

    Tuesday: Widespread freezing fog before 11am. Sunny, with a high near 57.

    High: 57 °F

    Freezing Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 10pm.  Mostly cloudy, with a low around 37.

    Low: 37 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Patchy fog between 8pm and 10pm. Widespread freezing fog after midnight. Otherwise, mostly cloudy, with a low around 28. North wind around 5 mph.
Sunday
Widespread freezing fog before 11am. Mostly sunny, with a high near 49. North wind around 6 mph.
Sunday Night
Widespread freezing fog after 10pm. Partly cloudy, with a low around 30. Northeast wind around 7 mph.
Monday
Widespread freezing fog before 11am. Sunny, with a high near 53. East wind 3 to 6 mph.
Monday Night
Widespread freezing fog after 10pm. Mostly clear, with a low around 33. East wind around 6 mph.
Tuesday
Widespread freezing fog before 11am. Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 35.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 37.
New Year's Day
A chance of rain. Mostly cloudy, with a high near 53.
Thursday Night
Rain likely. Mostly cloudy, with a low around 37.
Friday
Rain likely. Snow level 4300 feet. Mostly cloudy, with a high near 49.
Friday Night
A chance of rain. Snow level 3700 feet. Mostly cloudy, with a low around 34.
Saturday
A chance of rain. Snow level 3200 feet rising to 3800 feet in the afternoon. Partly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Happy Camp CA
 41.78°N 123.38°W (Elev. 1381 ft)
3:41 pm PST Dec 27, 2025
7pm PST Dec 27, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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