Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

56°F

13°C

Humidity 76%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 08 Dec 05:52 PM PST
Extended Forecast for

13 Miles W Happy Camp CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. West southwest wind around 9 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain before 10am, then a slight chance of rain after 1pm.  Snow level 8300 feet. Partly sunny, with a high near 45. West wind around 8 mph.  Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 10pm.  Snow level 8500 feet. Mostly cloudy, with a low around 42. West southwest wind around 7 mph.

    Low: 42 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. Northeast wind around 5 mph becoming light and variable  in the afternoon.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39. West wind around 6 mph.

    Low: 39 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. West southwest wind around 9 mph.
Tuesday
A slight chance of rain before 10am, then a slight chance of rain after 1pm. Snow level 8300 feet. Partly sunny, with a high near 45. West wind around 8 mph. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of rain before 10pm. Snow level 8500 feet. Mostly cloudy, with a low around 42. West southwest wind around 7 mph.
Wednesday
Mostly sunny, with a high near 49. Northeast wind around 5 mph becoming light and variable in the afternoon.
Wednesday Night
Mostly clear, with a low around 39. West wind around 6 mph.
Thursday
Sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 40.
Friday
Sunny, with a high near 50.
Friday Night
Mostly clear, with a low around 40.
Saturday
A slight chance of rain after 4pm. Snow level 7200 feet. Mostly sunny, with a high near 47.
Saturday Night
A chance of rain. Snow level 6900 feet. Mostly cloudy, with a low around 38.
Sunday
A chance of rain and snow. Snow level 6600 feet. Partly sunny, with a high near 41.
Sunday Night
A chance of rain and snow. Snow level 6700 feet. Mostly cloudy, with a low around 39.
Monday
Rain likely. Snow level 7300 feet. Mostly cloudy, with a high near 43.
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ABOUT THIS FORECAST

 
Point Forecast:
13 Miles W Happy Camp CA
 41.84°N 123.61°W (Elev. 5978 ft)
3:41 pm PST Dec 8, 2025
6pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database