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

STEHEKIN-AIRSTRIP (STRW1)

Lat: 48.34694°NLon: 120.72028°WElev: 1230.0ft.

NA

30°F

-1°C

Humidity 98%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 25 Dec 12:01 AM PST
Extended Forecast for

Trinity WA

Winter Weather Advisory December 26, 04:00am until December 26, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 24. Light east wind.

    Low: 24 °F

    Partly Cloudy

  • Christmas Day

    Christmas Day: Snow likely before 11am, then rain and snow. High near 33. East wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 33 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow, becoming all snow after midnight. Low around 28. Light southwest wind. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 28 °F

    Rain/Snow
    then Snow
    Likely

  • Friday

    Friday: Snow. The snow could be heavy at times. High near 32. Southwest wind 5 to 8 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.

    High: 32 °F

    Heavy Snow

  • Friday Night

    Friday Night: Snow, mainly before 10pm. Low around 19. 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: 19 °F

    Snow then
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 24. Light east wind.
Christmas Day
Snow likely before 11am, then rain and snow. High near 33. East wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
Rain and snow, becoming all snow after midnight. Low around 28. Light southwest wind. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow. The snow could be heavy at times. High near 32. Southwest wind 5 to 8 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.
Friday Night
Snow, mainly before 10pm. Low around 19. 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
Mostly sunny, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Partly sunny, with a high near 36.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 38.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 10%.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trinity WA
 48.08°N 120.84°W (Elev. 3346 ft)
Last Update:
1:07 am PST Dec 25, 2025
Forecast Valid:
1am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation