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 >

Hazardous Weather Conditions

Current conditions at

Ken Jernstedt Airfield (K4S2)

Lat: 45.67457°NLon: 121.53493°WElev: 600.0ft.

Mist

39°F

4°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.7 in (1005.76 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Last update 25 Dec 10:35 PM PST
Extended Forecast for

9 Miles ENE Cascade Locks OR

Winter Weather Advisory December 26, 04:00am until December 27, 04:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Showers likely, mainly after 3am. Snow level 3400 feet. Mostly cloudy, with a low around 35. East wind around 10 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Rain before 1pm, then rain and snow. Snow level 2900 feet lowering to 2300 feet in the afternoon . High near 37. Windy, with a west wind 14 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Rain and
    Breezy then
    Rain/Snow and
    Windy

  • Friday Night

    Friday Night: Snow, mainly before 4am. Low around 32. Very windy, with a west wind 28 to 30 mph, with gusts as high as 47 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 32 °F

    Snow and Very
    Windy

  • Saturday

    Saturday: A chance of snow before 10am, then a slight chance of snow showers after 10am. Mostly cloudy, with a high near 34. Windy, with a west wind 18 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Chance Snow
    and Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28. West wind around 10 mph.

    Low: 28 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 34.

    High: 34 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 33. Breezy.

    High: 33 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly after 3am. Snow level 3400 feet. Mostly cloudy, with a low around 35. East wind around 10 mph. Chance of precipitation is 60%.
Friday
Rain before 1pm, then rain and snow. Snow level 2900 feet lowering to 2300 feet in the afternoon . High near 37. Windy, with a west wind 14 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday Night
Snow, mainly before 4am. Low around 32. Very windy, with a west wind 28 to 30 mph, with gusts as high as 47 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Saturday
A chance of snow before 10am, then a slight chance of snow showers after 10am. Mostly cloudy, with a high near 34. Windy, with a west wind 18 to 26 mph, with gusts as high as 41 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 28. West wind around 10 mph.
Sunday
Mostly cloudy, with a high near 34.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Mostly cloudy, with a high near 33. Breezy.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 29.
Wednesday
A chance of rain. Mostly cloudy, with a high near 38.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 33.
New Year's Day
Rain likely. Snow level 3800 feet. Mostly cloudy, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles ENE Cascade Locks OR
 45.73°N 121.7°W (Elev. 1893 ft)
Last Update:
9:45 pm PST Dec 25, 2025
Forecast Valid:
10pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation