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

Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

33°F

1°C

Humidity 99%
Wind Speed SSE 2 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 14 Jan 11:52 AM PST
Extended Forecast for

12 Miles NNE Happy Camp CA

Freezing Fog Advisory January 14, 10:00pm until January 15, 12:00pm
Click here for hazard details and duration
Freezing Fog Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 56. North northeast wind 7 to 9 mph.

    High: 56 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 44. East northeast wind 11 to 16 mph, with gusts as high as 24 mph.

    Low: 44 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 54. East southeast wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 44. East southeast wind 17 to 20 mph, with gusts as high as 30 mph.

    Low: 44 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 53. Southeast wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 53 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 56. North northeast wind 7 to 9 mph.
Tonight
Clear, with a low around 44. East northeast wind 11 to 16 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 54. East southeast wind 13 to 17 mph, with gusts as high as 26 mph.
Thursday Night
Clear, with a low around 44. East southeast wind 17 to 20 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 53. Southeast wind 14 to 20 mph, with gusts as high as 30 mph.
Friday Night
Clear, with a low around 38.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 36.
M.L.King Day
Sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Happy Camp CA
 41.96°N 123.25°W (Elev. 5138 ft)
Last Update:
12:06 pm PST Jan 14, 2026
Forecast Valid:
12pm PST Jan 14, 2026-6pm PST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation