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

28°F

-2°C

Humidity 99%
Wind Speed SSE 22 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill14°F (-10°C)
Last update 24 Dec 07:25 AM PST
Extended Forecast for

4 Miles NW 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: 38 °F

    Heavy Snow
    and Breezy

  • Tonight

    Tonight: Snow. The snow could be heavy at times. Low around 25. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 10 to 14 inches possible.

    Low: 25 °F

    Heavy Snow
    and Breezy

  • Christmas Day

    Christmas Day: Snow. The snow could be heavy at times. High near 33. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 inches possible.

    High: 33 °F

    Heavy Snow
    and Breezy

  • Thursday Night

    Thursday Night: Snow before 10pm, then snow showers between 10pm and 4am, then snow after 4am. The snow could be heavy at times. Some thunder is also possible. Low around 23. Windy, with a south wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.

    Low: 23 °F

    Heavy Snow
    and Windy

  • Friday

    Friday: Snow. The snow could be heavy at times. High near 31. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 31 °F

    Heavy Snow
    and Breezy

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 8. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 8 °F

    Snow Likely

  • Saturday

    Saturday: A 30 percent chance of snow, mainly before 4pm. Mostly sunny, with a high near 31. Little or no snow accumulation expected.

    High: 31 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A slight chance of snow before 10pm. Mostly clear, with a low around 9.

    Low: 9 °F

    Slight Chance
    Snow then
    Mostly Clear

Detailed Forecast

Today
Snow. The snow could be heavy at times. High near 38. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 11 to 17 inches possible.
Tonight
Snow. The snow could be heavy at times. Low around 25. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of 10 to 14 inches possible.
Christmas Day
Snow. The snow could be heavy at times. High near 33. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 inches possible.
Thursday Night
Snow before 10pm, then snow showers between 10pm and 4am, then snow after 4am. The snow could be heavy at times. Some thunder is also possible. Low around 23. Windy, with a south wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.
Friday
Snow. The snow could be heavy at times. High near 31. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 8. Southwest wind 5 to 10 mph, with gusts as high as 20 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 31. Little or no snow accumulation expected.
Saturday Night
A slight chance of snow before 10pm. Mostly clear, with a low around 9.
Sunday
Sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 15.
Monday
Sunny, with a high near 40.
Monday Night
Mostly clear, with a low around 20.
Tuesday
A slight chance of rain and snow. Mostly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Mammoth Lakes CA
 37.7°N 119.01°W (Elev. 8448 ft)
Last Update:
1:15 am PST Dec 24, 2025
Forecast Valid:
7am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation