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

47°F

8°C

Humidity 95%
Wind Speed S 3 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 09 Dec 01:52 AM PST
Extended Forecast for

13 Miles W Happy Camp CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. West southwest wind around 17 mph, with gusts as high as 26 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly between 11am and 4pm.  Snow level 8200 feet. Partly sunny, with a high near 45. West wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 45 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 10 percent chance of rain before 7pm.  Snow level 8300 feet. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 44. West wind around 8 mph.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 50. North wind 5 to 8 mph becoming west in the afternoon.

    High: 50 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39. West southwest wind 8 to 10 mph becoming northeast after midnight.

    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 41.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Friday Night

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

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. West southwest wind around 17 mph, with gusts as high as 26 mph.
Tuesday
A 30 percent chance of rain, mainly between 11am and 4pm. Snow level 8200 feet. Partly sunny, with a high near 45. West wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
A 10 percent chance of rain before 7pm. Snow level 8300 feet. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 44. West wind around 8 mph.
Wednesday
Sunny, with a high near 50. North wind 5 to 8 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 39. West southwest wind 8 to 10 mph becoming northeast after midnight.
Thursday
Sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 51.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 48.
Saturday Night
A chance of rain and snow. Snow level 6800 feet. Partly cloudy, with a low around 39.
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 6900 feet. Mostly cloudy, with a low around 41.
Monday
Rain likely. Snow level 7600 feet. Mostly cloudy, with a high near 44. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
13 Miles W Happy Camp CA
 41.84°N 123.61°W (Elev. 5978 ft)
1:21 am PST Dec 9, 2025
2am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
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