National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

35°F

2°C

Humidity 90%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 28 Dec 02:52 AM PST
Extended Forecast for

12 Miles NE Happy Camp CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 27. North northeast wind around 10 mph.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 38. East wind 8 to 11 mph.

    High: 38 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. East southeast wind 14 to 16 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 44. East northeast wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 44 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. East wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Tuesday Night

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

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Wednesday Night

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

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 27. North northeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 38. East wind 8 to 11 mph.
Sunday Night
Mostly clear, with a low around 33. East southeast wind 14 to 16 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 44. East northeast wind 9 to 15 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 33. East wind 13 to 16 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 46.
Tuesday Night
Mostly clear, with a low around 34.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
A slight chance of rain and snow after 4am. Snow level 6500 feet. Mostly cloudy, with a low around 34.
New Year's Day
A chance of rain and snow, mainly after 10am. Snow level 6200 feet. Mostly cloudy, with a high near 41.
Thursday Night
Rain and snow likely. Snow level 6200 feet lowering to 5700 feet after midnight . Mostly cloudy, with a low around 33.
Friday
Snow likely. Mostly cloudy, with a high near 37.
Friday Night
Snow likely. Mostly cloudy, with a low around 32.
Saturday
A chance of snow. Mostly cloudy, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Happy Camp CA
 41.92°N 123.21°W (Elev. 5666 ft)
Last Update:
2:22 am PST Dec 28, 2025
Forecast Valid:
3am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation