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

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

NA

33°F

1°C

Humidity 95%
Wind Speed NE 1 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 24 Dec 03:06 PM PST
Extended Forecast for

4 Miles NNW Winthrop WA

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Mostly cloudy, with a high near 29. Light southeast wind.

    High: 29 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Increasing clouds, with a low around 23. Calm wind.

    Low: 23 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Snow before 3pm, then rain and snow. Patchy freezing fog between 11am and noon. High near 29. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Snow Likely
    and Patchy
    Freezing Fog
    then
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow likely before 11pm, then a chance of snow. Mostly cloudy, with a low around 25. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Friday

    Friday: Snow, mainly after 10am. High near 27. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 27 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 16. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Mostly cloudy, with a high near 29. Light southeast wind.
Tonight
Increasing clouds, with a low around 23. Calm wind.
Christmas Day
Snow before 3pm, then rain and snow. Patchy freezing fog between 11am and noon. High near 29. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Rain and snow likely before 11pm, then a chance of snow. Mostly cloudy, with a low around 25. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow, mainly after 10am. High near 27. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 16. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Mostly sunny, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Partly sunny, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Mostly cloudy, with a high near 31.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 35. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Winthrop WA
 48.52°N 120.23°W (Elev. 2520 ft)
Last Update:
3:17 pm PST Dec 24, 2025
Forecast Valid:
4pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation