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

24°F

-4°C

Humidity 97%
Wind Speed S 28 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Wind Chill7°F (-14°C)
Last update 24 Dec 05:25 PM PST
Extended Forecast for

2 Miles NW Mammoth Lakes CA

Winter Storm Warning December 24, 05:52pm until December 26, 10:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning December 24, 05:52pm until December 26, 10:00am

    NOW until 10:00am Fri

    Winter Storm Warning

  • This Afternoon

    High: 37 °F

    Chance Snow
    and Breezy

  • Tonight

    Tonight: Snow, mainly after 7pm. The snow could be heavy at times. Widespread dense freezing fog after 5am. Low around 27. Breezy, with a south wind around 25 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 9 to 13 inches possible.

    Low: 27 °F

    Heavy Snow
    and Dense
    Freezing Fog

  • Christmas Day

    Christmas Day: Snow before 4pm, then snow showers after 4pm. The snow could be heavy at times. Some thunder is also possible. Patchy fog before 7am. Widespread dense freezing fog between 7am and 10am. High near 31. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.

    High: 31 °F

    Heavy Snow
    and Dense
    Freezing Fog

  • Thursday Night

    Thursday Night: Snow showers before 10pm, then snow after 10pm. The snow could be heavy at times. Some thunder is also possible. Low around 26. Windy, with a southwest wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 inches possible.

    Low: 26 °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 40 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 31 °F

    Heavy Snow
    and Breezy

  • Friday Night

    Friday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 11. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

    Low: 11 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow. Mostly sunny, with a high near 30.

    High: 30 °F

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 50 percent chance of snow. Partly sunny, with a high near 37. Breezy, with a southwest wind around 25 mph, with gusts as high as 35 mph. Total daytime snow accumulation of 11 to 17 inches possible.
Tonight
Snow, mainly after 7pm. The snow could be heavy at times. Widespread dense freezing fog after 5am. Low around 27. Breezy, with a south wind around 25 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 9 to 13 inches possible.
Christmas Day
Snow before 4pm, then snow showers after 4pm. The snow could be heavy at times. Some thunder is also possible. Patchy fog before 7am. Widespread dense freezing fog between 7am and 10am. High near 31. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.
Thursday Night
Snow showers before 10pm, then snow after 10pm. The snow could be heavy at times. Some thunder is also possible. Low around 26. Windy, with a southwest wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 14 to 20 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 40 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 11. 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 30.
Saturday Night
Mostly clear, with a low around 11.
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 22.
Tuesday
Sunny, with a high near 45.
Tuesday Night
Mostly clear, with a low around 27.
Wednesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Mammoth Lakes CA
 37.66°N 119°W (Elev. 8681 ft)
Last Update:
1:15 pm PST Dec 24, 2025
Forecast Valid:
5pm PST Dec 24, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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