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

DW5868 Mammoth Lakes (D5868)

Lat: 37.625°NLon: 118.98°WElev: 7973.0ft.

NA

N/A

Humidity NA
Wind Speed NA NA MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

Mammoth Lakes CA

Winter Storm Warning December 25, 05:24am until December 26, 10:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning December 25, 05:24am until December 26, 10:00am

    NOW until 10:00am Fri

    Winter Storm Warning

  • Overnight

    Low: 26 °F

    Heavy Snow
    and Breezy

  • Christmas Day

    Christmas Day: Snow. The snow could be heavy at times. Patchy fog before 7am. Patchy freezing fog between 7am and 10am. High near 33. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 11 to 17 inches possible.

    High: 33 °F

    Heavy Snow
    and Patchy
    Freezing Fog

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times. Low around 25. Breezy, with a southwest wind around 25 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.

    Low: 25 °F

    Heavy Snow
    and Breezy

  • Friday

    Friday: Snow, mainly before 4pm. The snow could be heavy at times. Patchy dense freezing fog before 10am. High near 33. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 33 °F

    Heavy Snow
    and Patchy
    Dense
    Freezing Fog

  • Friday Night

    Friday Night: A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 10. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

    Low: 10 °F

    Chance Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow. Mostly sunny, with a high near 32. West wind around 5 mph becoming calm.

    High: 32 °F

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 26. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 7 to 11 inches possible.
Christmas Day
Snow. The snow could be heavy at times. Patchy fog before 7am. Patchy freezing fog between 7am and 10am. High near 33. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 11 to 17 inches possible.
Thursday Night
Snow. The snow could be heavy at times. Low around 25. Breezy, with a southwest wind around 25 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.
Friday
Snow, mainly before 4pm. The snow could be heavy at times. Patchy dense freezing fog before 10am. High near 33. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Friday Night
A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 10. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.
Saturday
A 20 percent chance of snow. Mostly sunny, with a high near 32. West wind around 5 mph becoming calm.
Saturday Night
Mostly clear, with a low around 8.
Sunday
Sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 14.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 21.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Lakes CA
 37.66°N 118.97°W (Elev. 8301 ft)
Last Update:
1:16 am PST Dec 25, 2025
Forecast Valid:
5am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation