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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

48°F

9°C

Humidity 97%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 01 Jan 03:52 PM PST
Extended Forecast for

16 Miles NE Happy Camp CA

Winter Storm Watch January 3, 04:00pm until January 4, 10:00pm
Click here for hazard details and duration
Winter Storm Watch

  • New Year's Day

    New Year's Day: Rain. High near 47. South wind around 9 mph. Chance of precipitation is 80%.

    High: 47 °F

    Rain

  • Tonight

    Tonight: Rain likely, mainly before 4am. Mostly cloudy, with a low around 42. South wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain Likely

  • Friday

    Friday: A slight chance of rain before 8am, then rain likely after 10am. Partly sunny, with a high near 48. South southeast wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 48 °F

    Slight Chance
    Rain then
    Rain Likely

  • Friday Night

    Friday Night: Rain. Low around 39. South southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Saturday

    Saturday: Rain. Snow level 5500 feet. High near 44. South southeast wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Snow level 5400 feet lowering to 4800 feet after midnight . Low around 38. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain

  • Sunday

    Sunday: Rain. Snow level 4600 feet. High near 40. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 40 °F

    Rain

  • Sunday Night

    Sunday Night: Rain before 10pm, then rain, possibly mixed with snow. Snow level 4100 feet. Cloudy, with a low around 33.

    Low: 33 °F

    Rain/Snow

  • Monday

    Monday: Rain, possibly mixed with snow, becoming all rain after 1pm. Snow level 3900 feet. Mostly cloudy, with a high near 40.

    High: 40 °F

    Rain/Snow

Detailed Forecast

New Year's Day
Rain. High near 47. South wind around 9 mph. Chance of precipitation is 80%.
Tonight
Rain likely, mainly before 4am. Mostly cloudy, with a low around 42. South wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A slight chance of rain before 8am, then rain likely after 10am. Partly sunny, with a high near 48. South southeast wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday Night
Rain. Low around 39. South southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain. Snow level 5500 feet. High near 44. South southeast wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Snow level 5400 feet lowering to 4800 feet after midnight . Low around 38. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain. Snow level 4600 feet. High near 40. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain before 10pm, then rain, possibly mixed with snow. Snow level 4100 feet. Cloudy, with a low around 33.
Monday
Rain, possibly mixed with snow, becoming all rain after 1pm. Snow level 3900 feet. Mostly cloudy, with a high near 40.
Monday Night
A chance of rain before 10pm, then a slight chance of rain and snow. Snow level 4000 feet. Mostly cloudy, with a low around 33.
Tuesday
A chance of rain and snow. Snow level 3700 feet rising to 4500 feet in the afternoon. Partly sunny, with a high near 42.
Tuesday Night
A chance of rain and snow. Snow level 4400 feet. Mostly cloudy, with a low around 35.
Wednesday
Rain and snow likely. Snow level 3600 feet. Mostly cloudy, with a high near 40.
Wednesday Night
Snow likely, possibly mixed with rain. Mostly cloudy, with a low around 30.
Thursday
A chance of snow. Partly sunny, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles NE Happy Camp CA
 41.97°N 123.17°W (Elev. 2999 ft)
Last Update:
3:41 pm PST Jan 1, 2026
Forecast Valid:
4pm PST Jan 1, 2026-6pm PST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation