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

ROCK CREEK (RCEC1)

Lat: 37.55983°NLon: 118.67841°WElev: 7103.0ft.

NA

32°F

0°C

Humidity 100%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 24 Dec 07:04 AM PST
Extended Forecast for

12 Miles ESE Chalfant CA

Winter Storm Warning until December 26, 10:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning until December 26, 10:00am

    NOW until 10:00am Fri

    Winter Storm Warning

  • Today

    High: 30 °F

    Heavy Snow
    and Very
    Windy

  • Tonight

    Tonight: Snow, mainly before 4am. Low around 22. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 22 °F

    Snow and
    Windy

  • Christmas Day

    Christmas Day: Snow, mainly after 7am. High near 27. Windy, with a south wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 27 °F

    Snow and
    Windy

  • Thursday Night

    Thursday Night: Snow. Low around 24. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.

    Low: 24 °F

    Snow and
    Windy

  • Friday

    Friday: Snow. High near 27. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 27 °F

    Snow and
    Breezy

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 15. West wind 10 to 15 mph. Little or no snow accumulation expected.

    Low: 15 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow before 10am. Mostly sunny, with a high near 23.

    High: 23 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 13.

    Low: 13 °F

    Mostly Clear

Detailed Forecast

Today
Snow. The snow could be heavy at times. High near 30. Very windy, with a south wind 40 to 45 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 70 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 6 to 10 inches possible.
Tonight
Snow, mainly before 4am. Low around 22. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Christmas Day
Snow, mainly after 7am. High near 27. Windy, with a south wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
Snow. Low around 24. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.
Friday
Snow. High near 27. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday Night
A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 15. West wind 10 to 15 mph. Little or no snow accumulation expected.
Saturday
A 20 percent chance of snow before 10am. Mostly sunny, with a high near 23.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Sunny, with a high near 24.
Sunday Night
Mostly clear, with a low around 15.
Monday
Sunny, with a high near 28.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles ESE Chalfant CA
 37.46°N 118.16°W (Elev. 9800 ft)
Last Update:
1:15 am PST Dec 24, 2025
Forecast Valid:
8am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation