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

Mammoth Yosemite Airport (KMMH)

Lat: 37.6241°NLon: 118.8423°WElev: 7112.0ft.

Overcast

36°F

2°C

Humidity 80%
Wind Speed ESE 13 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 23 Dec 11:55 PM PST
Extended Forecast for

12 Miles SE 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: 21 °F

    Heavy Snow
    and Windy

  • Wednesday

    Wednesday: Snow. The snow could be heavy at times. High near 25. Very windy, with a south wind 35 to 40 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 25 to 31 inches possible.

    High: 25 °F

    Heavy Snow
    and Very
    Windy

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times. Low around 17. Windy, with a south wind 30 to 35 mph, with gusts as high as 50 mph. Chance of precipitation is 90%. New snow accumulation of 10 to 14 inches possible.

    Low: 17 °F

    Heavy Snow
    and Windy

  • Christmas Day

    Christmas Day: Snow. The snow could be heavy at times. High near 18. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 21 to 27 inches possible.

    High: 18 °F

    Heavy Snow
    and Windy

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times. Low around 13. Very windy, with a southwest wind 35 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 19 to 25 inches possible.

    Low: 13 °F

    Heavy Snow
    and Very
    Windy

  • Friday

    Friday: Snow. The snow could be heavy at times. High near 14. Windy, with a southwest wind 25 to 30 mph decreasing to 20 to 25 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.

    High: 14 °F

    Heavy Snow
    and Windy

  • Friday Night

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

    Low: 2 °F

    Snow Likely
    then Chance
    Snow

  • Saturday

    Saturday: A slight chance of snow. Mostly sunny, with a high near 15.

    High: 15 °F

    Slight Chance
    Snow

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 21. Windy, with a south wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 12 to 18 inches possible.
Wednesday
Snow. The snow could be heavy at times. High near 25. Very windy, with a south wind 35 to 40 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 25 to 31 inches possible.
Wednesday Night
Snow. The snow could be heavy at times. Low around 17. Windy, with a south wind 30 to 35 mph, with gusts as high as 50 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 18. Windy, with a south wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 21 to 27 inches possible.
Thursday Night
Snow. The snow could be heavy at times. Low around 13. Very windy, with a southwest wind 35 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 19 to 25 inches possible.
Friday
Snow. The snow could be heavy at times. High near 14. Windy, with a southwest wind 25 to 30 mph decreasing to 20 to 25 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 2. 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 15.
Saturday Night
Mostly clear, with a low around 2. Breezy.
Sunday
Sunny, with a high near 19. Blustery.
Sunday Night
Mostly clear, with a low around 9. Blustery.
Monday
Sunny, with a high near 24. Blustery.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Mostly sunny, with a high near 28.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles SE Mammoth Lakes CA
 37.5°N 118.85°W (Elev. 11572 ft)
Last Update:
9:15 pm PST Dec 23, 2025
Forecast Valid:
12am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation