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

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

52°F

11°C

Humidity 94%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 11 Apr 03:52 PM PDT
Extended Forecast for

12 Miles NE Happy Camp CA

Winter Weather Advisory April 11, 08:00pm until April 12, 11:00am
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Snow showers. Some thunder is also possible. High near 38. South southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.

    High: 38 °F

    Snow Showers

  • Tonight

    Tonight: Snow showers. Low around 32. East wind 5 to 8 mph becoming light and variable. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Snow Showers
    then Snow
    Showers
    Likely

  • Sunday

    Sunday: Snow showers, mainly after 9am. Some thunder is also possible. High near 38. Southeast wind around 6 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Chance Snow
    Showers then
    Snow Showers

  • Sunday Night

    Sunday Night: Snow showers, mainly before 11pm. Low around 34. West southwest wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 34 °F

    Snow Showers
    then Chance
    Snow Showers

  • Monday

    Monday: Snow showers likely. Mostly cloudy, with a high near 38. West wind 3 to 5 mph. Winds could gust as high as 22 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 38 °F

    Snow Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 35. Little or no snow accumulation expected.

    Low: 35 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Snow

  • Wednesday

    Wednesday: Snow. Cloudy, with a high near 36.

    High: 36 °F

    Snow

Detailed Forecast

This Afternoon
Snow showers. Some thunder is also possible. High near 38. South southwest wind around 7 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow showers. Low around 32. East wind 5 to 8 mph becoming light and variable. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday
Snow showers, mainly after 9am. Some thunder is also possible. High near 38. Southeast wind around 6 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow showers, mainly before 11pm. Low around 34. West southwest wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Monday
Snow showers likely. Mostly cloudy, with a high near 38. West wind 3 to 5 mph. Winds could gust as high as 22 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday Night
A 30 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 35. Little or no snow accumulation expected.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 35.
Wednesday
Snow. Cloudy, with a high near 36.
Wednesday Night
Snow likely, mainly before 11pm. Mostly cloudy, with a low around 26.
Thursday
Sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 28.
Friday
Sunny, with a high near 52.
Friday Night
Partly cloudy, with a low around 36.
Saturday
A chance of rain. Snow level rising to 6700 feet in the afternoon. Mostly sunny, with a high near 53.
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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:
4:41 pm PDT Apr 11, 2026
Forecast Valid:
4pm PDT Apr 11, 2026-6pm PDT Apr 18, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation