National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Top Stn/Summit (MTH03)

Lat: 37.63059°NLon: 119.03282°WElev: 11034.0ft.

NA

24°F

-4°C

Humidity 99%
Wind Speed SSW 41 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Wind Chill4°F (-16°C)
Last update 24 Dec 12:25 AM PST
Extended Forecast for

3 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

  • Overnight

    Low: 31 °F

    Heavy Snow
    and Breezy

  • Wednesday

    Wednesday: Snow. The snow could be heavy at times. High near 35. Breezy, with a south wind 20 to 25 mph decreasing to 15 to 20 mph in the morning. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.

    High: 35 °F

    Heavy Snow
    and Breezy

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times. Low around 28. Breezy, with a south wind 20 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of 9 to 13 inches possible.

    Low: 28 °F

    Heavy Snow
    and Breezy

  • Christmas Day

    Christmas Day: Snow. The snow could be heavy at times. High near 30. 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 18 to 24 inches possible.

    High: 30 °F

    Heavy Snow
    and Breezy

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times. Low around 23. Windy, with a south wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.

    Low: 23 °F

    Heavy Snow
    and Windy

  • Friday

    Friday: Snow. The snow could be heavy at times. High near 26. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.

    High: 26 °F

    Heavy Snow
    and Breezy

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 14. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 14 °F

    Snow Likely
    then Chance
    Snow

  • Saturday

    Saturday: A slight chance of snow. Mostly sunny, with a high near 26.

    High: 26 °F

    Slight Chance
    Snow

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 31. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 7 to 11 inches possible.
Wednesday
Snow. The snow could be heavy at times. High near 35. Breezy, with a south wind 20 to 25 mph decreasing to 15 to 20 mph in the morning. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.
Wednesday Night
Snow. The snow could be heavy at times. Low around 28. Breezy, with a south wind 20 to 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. The snow could be heavy at times. High near 30. 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 18 to 24 inches possible.
Thursday Night
Snow. The snow could be heavy at times. Low around 23. Windy, with a south wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 16 to 22 inches possible.
Friday
Snow. The snow could be heavy at times. High near 26. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 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 14. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Saturday
A slight chance of snow. Mostly sunny, with a high near 26.
Saturday Night
Mostly clear, with a low around 15.
Sunday
Sunny, with a high near 30.
Sunday Night
Mostly clear, with a low around 20.
Monday
Sunny, with a high near 35.
Monday Night
Mostly clear, with a low around 25.
Tuesday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Mammoth Lakes CA
 37.65°N 119.03°W (Elev. 8809 ft)
Last Update:
9:15 pm PST Dec 23, 2025
Forecast Valid:
12am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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