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

15 Miles W 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: 40 °F

    Rain/Snow and
    Breezy

  • Tonight

    Tonight: Rain, possibly mixed with snow, becoming all snow after 7pm. Low around 30. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Rain/Snow
    then Snow and
    Breezy

  • Christmas Day

    Christmas Day: Snow, mainly after 7am. High near 38. Breezy, with a south wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 38 °F

    Snow and
    Breezy

  • Thursday Night

    Thursday Night: Snow. Low around 29. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 29 °F

    Snow and
    Breezy

  • Friday

    Friday: Snow. High near 37. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Snow

  • Friday Night

    Friday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 16. West wind around 10 mph. Little or no snow accumulation expected.

    Low: 16 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow. Mostly sunny, with a high near 34.

    High: 34 °F

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

Detailed Forecast

Today
Rain and snow. Snow level 8100 feet lowering to 7600 feet. High near 40. Breezy, with a southeast wind 20 to 25 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tonight
Rain, possibly mixed with snow, becoming all snow after 7pm. Low around 30. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Christmas Day
Snow, mainly after 7am. High near 38. Breezy, with a south wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Thursday Night
Snow. Low around 29. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Friday
Snow. High near 37. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 16. West wind around 10 mph. Little or no snow accumulation expected.
Saturday
A 20 percent chance of snow. Mostly sunny, with a high near 34.
Saturday Night
Mostly clear, with a low around 17.
Sunday
Sunny, with a high near 36.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 40.
Monday Night
Mostly clear, with a low around 24.
Tuesday
Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles W Chalfant CA
 37.55°N 118.63°W (Elev. 7014 ft)
Last Update:
9:15 am PST Dec 24, 2025
Forecast Valid:
9am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation