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 85%
Wind Speed ENE 4 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 27 Dec 10:52 PM PST
Extended Forecast for

Happy Camp CA

  • Tonight

    Tonight: Widespread freezing fog after midnight. Mostly cloudy, with a low around 30. North wind 3 to 5 mph.

    Low: 30 °F

    Freezing Fog

  • Sunday

    Sunday: Widespread freezing fog before 11am. Mostly sunny, with a high near 49. Northeast wind 3 to 5 mph.

    High: 49 °F

    Freezing Fog
    then Sunny

  • Sunday Night

    Sunday Night: Widespread freezing fog after 10pm. Partly cloudy, with a low around 32. East northeast wind around 7 mph.

    Low: 32 °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 35. East wind around 7 mph.

    Low: 35 °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 37.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 10pm.  Mostly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Widespread freezing fog after midnight. Mostly cloudy, with a low around 30. North wind 3 to 5 mph.
Sunday
Widespread freezing fog before 11am. Mostly sunny, with a high near 49. Northeast wind 3 to 5 mph.
Sunday Night
Widespread freezing fog after 10pm. Partly cloudy, with a low around 32. East 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 35. East wind around 7 mph.
Tuesday
Widespread freezing fog before 11am. Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Mostly sunny, with a high near 58.
Wednesday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 38.
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 38.
Friday
Rain likely. Snow level 4300 feet. Mostly cloudy, with a high near 50.
Friday Night
A chance of rain. Snow level 3700 feet. Mostly cloudy, with a low around 36.
Saturday
A chance of rain. Snow level 3200 feet rising to 3800 feet in the afternoon. Partly sunny, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Happy Camp CA
 41.81°N 123.36°W (Elev. 1299 ft)
9:41 pm PST Dec 27, 2025
11pm PST Dec 27, 2025-6pm PST Jan 3, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database