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

Top of 22 (MTH02)

Lat: 37.63707°NLon: 119.0174°WElev: 10100.0ft.

NA

26°F

-3°C

Humidity 98%
Wind Speed S 18 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Wind Chill13°F (-11°C)
Last update 24 Dec 09:45 AM PST
Extended Forecast for

2 Miles WNW Mammoth Lakes 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: 31 °F

    Heavy Snow
    and Very
    Windy

  • Tonight

    Tonight: Snow. The snow could be heavy at times. Low around 22. Very windy, with a southwest wind 40 to 45 mph, with gusts as high as 70 mph. Chance of precipitation is 90%. New snow accumulation of 11 to 17 inches possible.

    Low: 22 °F

    Heavy Snow
    and Very
    Windy

  • Christmas Day

    Christmas Day: Snow. The snow could be heavy at times. High near 26. Very windy, with a south wind 40 to 50 mph, with gusts as high as 70 mph. Chance of precipitation is 100%. New snow accumulation of 17 to 23 inches possible.

    High: 26 °F

    Heavy Snow
    and Very
    Windy

  • Thursday Night

    Thursday Night: Snow before 10pm, then snow showers after 10pm. The snow could be heavy at times. Some thunder is also possible. Low around 19. Strong and damaging winds, with a south wind 55 to 60 mph, with gusts as high as 90 mph. Chance of precipitation is 100%. New snow accumulation of 15 to 21 inches possible.

    Low: 19 °F

    Heavy Snow
    and Damaging
    Winds

  • Friday

    Friday: Snow. The snow could be heavy at times. High near 23. Very windy, with a southwest wind 40 to 45 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 65 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.

    High: 23 °F

    Heavy Snow
    and Very
    Windy

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 10. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 10 °F

    Snow Likely
    and Breezy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly before 4pm. Mostly sunny, with a high near 20. Little or no snow accumulation expected.

    High: 20 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A slight chance of snow before 10pm. Mostly clear, with a low around 12. Blustery.

    Low: 12 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Clear

Detailed Forecast

Today
Snow. The snow could be heavy at times. High near 31. Very windy, with a southwest wind 35 to 40 mph, with gusts as high as 60 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 17 to 23 inches possible.
Tonight
Snow. The snow could be heavy at times. Low around 22. Very windy, with a southwest wind 40 to 45 mph, with gusts as high as 70 mph. Chance of precipitation is 90%. New snow accumulation of 11 to 17 inches possible.
Christmas Day
Snow. The snow could be heavy at times. High near 26. Very windy, with a south wind 40 to 50 mph, with gusts as high as 70 mph. Chance of precipitation is 100%. New snow accumulation of 17 to 23 inches possible.
Thursday Night
Snow before 10pm, then snow showers after 10pm. The snow could be heavy at times. Some thunder is also possible. Low around 19. Strong and damaging winds, with a south wind 55 to 60 mph, with gusts as high as 90 mph. Chance of precipitation is 100%. New snow accumulation of 15 to 21 inches possible.
Friday
Snow. The snow could be heavy at times. High near 23. Very windy, with a southwest wind 40 to 45 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 65 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 10. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
A 30 percent chance of snow, mainly before 4pm. Mostly sunny, with a high near 20. Little or no snow accumulation expected.
Saturday Night
A slight chance of snow before 10pm. Mostly clear, with a low around 12. Blustery.
Sunday
Sunny, with a high near 24. Blustery.
Sunday Night
Mostly clear, with a low around 15. Blustery.
Monday
Sunny, with a high near 29.
Monday Night
Mostly clear, with a low around 21.
Tuesday
A slight chance of snow. Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Mammoth Lakes CA
 37.63°N 119.02°W (Elev. 9872 ft)
Last Update:
9:15 am PST Dec 24, 2025
Forecast Valid:
10am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
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