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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

37°F

3°C

Humidity 98%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 26 Dec 01:52 AM PST
Extended Forecast for

8 Miles NW Cave Junction OR

  • Overnight

    Overnight: Snow. Low around 31. Breezy, with a south wind around 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.

    Low: 31 °F

    Snow and
    Breezy

  • Friday

    Friday: Snow. High near 34. East southeast wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 34 °F

    Snow

  • Friday Night

    Friday Night: Snow showers likely, mainly before 10pm. Mostly cloudy, with a low around 29. West northwest wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Snow Showers
    Likely

  • Saturday

    Saturday: A 50 percent chance of snow showers. Partly sunny, with a high near 33. North northeast wind around 8 mph. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27. Northeast wind around 11 mph, with gusts as high as 18 mph.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Snow. Low around 31. Breezy, with a south wind around 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.
Friday
Snow. High near 34. East southeast wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow showers likely, mainly before 10pm. Mostly cloudy, with a low around 29. West northwest wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
A 50 percent chance of snow showers. Partly sunny, with a high near 33. North northeast wind around 8 mph. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 27. Northeast wind around 11 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 37.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Mostly sunny, with a high near 46.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
A slight chance of rain. Snow level 6300 feet. Partly sunny, with a high near 45.
Wednesday Night
A chance of rain and snow. Snow level 6000 feet lowering to 5500 feet after midnight . Mostly cloudy, with a low around 37.
New Year's Day
Rain and snow. Snow level 4700 feet. Mostly cloudy, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NW Cave Junction OR
 42.24°N 123.75°W (Elev. 4163 ft)
Last Update:
2:21 am PST Dec 26, 2025
Forecast Valid:
2am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation