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

38°F

3°C

Humidity 82%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 28 Dec 09:52 AM PST
Extended Forecast for

11 Miles NNE Happy Camp CA

  • Today

    Today: Sunny, with a high near 38. East northeast wind 6 to 8 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 31. East wind around 10 mph.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 44. East northeast wind 7 to 9 mph.

    High: 44 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. East southeast wind around 10 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 47. South wind 6 to 10 mph.

    High: 47 °F

    Sunny

  • Tuesday Night

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

    Low: 35 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 4am.  Snow level 6500 feet. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • New Year's Day

    New Year's Day: A slight chance of rain before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm.  Snow level 6200 feet. Mostly cloudy, with a high near 42.

    High: 42 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 38. East northeast wind 6 to 8 mph.
Tonight
Mostly clear, with a low around 31. East wind around 10 mph.
Monday
Sunny, with a high near 44. East northeast wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 33. East southeast wind around 10 mph.
Tuesday
Sunny, with a high near 47. South wind 6 to 10 mph.
Tuesday Night
Mostly clear, with a low around 35.
Wednesday
Partly sunny, with a high near 46.
Wednesday Night
A slight chance of rain after 4am. Snow level 6500 feet. Mostly cloudy, with a low around 34.
New Year's Day
A slight chance of rain before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Snow level 6200 feet. Mostly cloudy, with a high near 42.
Thursday Night
Rain likely before 7pm, then rain and snow likely. Snow level 6200 feet lowering to 5600 feet after midnight . Mostly cloudy, with a low around 34.
Friday
Rain and snow likely. Snow level 4900 feet. Mostly cloudy, with a high near 38.
Friday Night
Snow likely. Mostly cloudy, with a low around 32.
Saturday
A chance of snow. Mostly cloudy, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNE Happy Camp CA
 41.95°N 123.28°W (Elev. 4839 ft)
9:41 am PST Dec 28, 2025
10am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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