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

CASTLE ROCK (TR950)

Lat: 46.27139°NLon: 122.89194°WElev: 213.0ft.

NA

37°F

3°C

Humidity 100%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 26 Dec 01:09 AM PST
Extended Forecast for

16 Miles ENE Kelso WA

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

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 3am. Snow level 3300 feet. Mostly cloudy, with a low around 35. South southeast wind around 6 mph.

    Low: 35 °F

    Chance Rain

  • Friday

    Friday: Rain and snow showers, becoming all snow after 3pm. Snow level 3200 feet lowering to 2000 feet in the afternoon . Temperature falling to around 33 by 5pm. South wind 7 to 9 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 36 °F⇓

    Rain/Snow

  • Friday Night

    Friday Night: Snow showers. Some thunder is also possible. Steady temperature around 32. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 32 °F

    Snow Showers

  • Saturday

    Saturday: Snow showers likely, mainly before 10am. Widespread frost after 4pm. Otherwise, partly sunny, with a high near 33. West wind 3 to 6 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Showers
    Likely then
    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: Widespread frost before 7pm. Otherwise, mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Frost then
    Mostly Cloudy

  • Sunday

    Sunday: Widespread frost, mainly before noon. Otherwise, partly sunny, with a high near 37.

    High: 37 °F

    Frost

  • Sunday Night

    Sunday Night: Widespread frost between 10pm and midnight. Otherwise, mostly cloudy, with a low around 29.

    Low: 29 °F

    Frost then
    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 3am. Snow level 3300 feet. Mostly cloudy, with a low around 35. South southeast wind around 6 mph.
Friday
Rain and snow showers, becoming all snow after 3pm. Snow level 3200 feet lowering to 2000 feet in the afternoon . Temperature falling to around 33 by 5pm. South wind 7 to 9 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Friday Night
Snow showers. Some thunder is also possible. Steady temperature around 32. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Saturday
Snow showers likely, mainly before 10am. Widespread frost after 4pm. Otherwise, partly sunny, with a high near 33. West wind 3 to 6 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
Widespread frost before 7pm. Otherwise, mostly cloudy, with a low around 30. Calm wind.
Sunday
Widespread frost, mainly before noon. Otherwise, partly sunny, with a high near 37.
Sunday Night
Widespread frost between 10pm and midnight. Otherwise, mostly cloudy, with a low around 29.
Monday
Mostly cloudy, with a high near 39.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A chance of rain. Mostly cloudy, with a high near 41.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 37.
New Year's Day
Rain. Snow level 3600 feet. Cloudy, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles ENE Kelso WA
 46.21°N 122.59°W (Elev. 2031 ft)
Last Update:
1:41 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