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.

Rain

37°F

3°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.62 in (1003.05 mb)
Dewpoint 36°F (2°C)
Visibility 5.00 mi
Last update 25 Dec 04:35 AM 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

  • Overnight

    Overnight: Rain and snow likely. Snow level 4100 feet. Mostly cloudy, with a low around 33. Breezy, with an east wind around 21 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 33 °F

    Rain/Snow
    Likely and
    Breezy

  • Christmas Day

    Christmas Day: Rain and snow likely before 9am, then rain. Snow level 4800 feet lowering to 4200 feet in the afternoon . High near 37. Breezy, with an east wind 9 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 37 °F

    Rain/Snow and
    Breezy then
    Rain Likely

  • Thursday Night

    Thursday Night: A slight chance of rain before 1am, then rain and snow likely. Snow level 3700 feet lowering to 3100 feet after midnight . Mostly cloudy, with a low around 33. North northeast wind 8 to 11 mph becoming southeast in the evening. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Slight Chance
    Rain then
    Rain/Snow
    Likely

  • Friday

    Friday: Snow showers. High near 34. Breezy, with a west wind 14 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 34 °F

    Snow Showers
    and Breezy

  • Friday Night

    Friday Night: Snow showers, mainly before 4am. Low around 29. Very windy, with a west wind 30 to 33 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 29 °F

    Snow Showers
    and Very
    Windy

  • Saturday

    Saturday: A 50 percent chance of snow showers, mainly before 10am. Mostly cloudy, with a high near 32. Windy. New snow accumulation of less than a half inch possible.

    High: 32 °F

    Chance Snow
    Showers and
    Windy

  • Saturday Night

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

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. Breezy.

    Low: 26 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
Rain and snow likely. Snow level 4100 feet. Mostly cloudy, with a low around 33. Breezy, with an east wind around 21 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Christmas Day
Rain and snow likely before 9am, then rain. Snow level 4800 feet lowering to 4200 feet in the afternoon . High near 37. Breezy, with an east wind 9 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
A slight chance of rain before 1am, then rain and snow likely. Snow level 3700 feet lowering to 3100 feet after midnight . Mostly cloudy, with a low around 33. North northeast wind 8 to 11 mph becoming southeast in the evening. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow showers. High near 34. Breezy, with a west wind 14 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow showers, mainly before 4am. Low around 29. Very windy, with a west wind 30 to 33 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday
A 50 percent chance of snow showers, mainly before 10am. Mostly cloudy, with a high near 32. Windy. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 26. Breezy.
Monday
Mostly cloudy, with a high near 32. Breezy.
Monday Night
Mostly cloudy, with a low around 26. Breezy.
Tuesday
Mostly cloudy, with a high near 33.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 28.
Wednesday
A slight chance of rain and snow. Mostly cloudy, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles ENE Cascade Locks OR
 45.75°N 121.71°W (Elev. 3081 ft)
Last Update:
4:41 am PST Dec 25, 2025
Forecast Valid:
4am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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