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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Mammoth Yosemite Airport (KMMH)

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

snow,fog

32°F

0°C

Humidity 100%
Wind Speed WNW 20 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 32°F (0°C)
Visibility 0.25 mi
Wind Chill20°F (-7°C)
Last update 01 Jan 11:55 AM PST
Extended Forecast for

12 Miles ENE Mammoth Lakes CA

Winter Storm Warning January 3, 12:00am until January 5, 10:00am
Click here for hazard details and duration
Winter Storm Warning

  • New Year's Day

    New Year's Day: Rain and snow before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and snow after 4pm. Snow level 7100 feet. High near 42. South wind around 5 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 42 °F

    Rain/Snow

  • Tonight

    Tonight: A 10 percent chance of snow before 7pm. Partly cloudy, with a low around 18. Northwest wind around 5 mph becoming calm in the evening.

    Low: 18 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43. Calm wind becoming south around 5 mph in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Snow likely, mainly after 4am. Snow level 6800 feet. Mostly cloudy, with a low around 22. South wind around 5 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 22 °F

    Chance Snow
    then Snow
    Likely

  • Saturday

    Saturday: Rain and snow likely before 10am, then rain. Snow level 7500 feet. High near 43. South wind 5 to 15 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 43 °F

    Rain/Snow
    then Rain

  • Saturday Night

    Saturday Night: Rain and snow, becoming all snow after 10pm. Snow level 6900 feet. Low around 22. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Rain/Snow
    then Snow
    Likely

  • Sunday

    Sunday: Snow before 1pm, then rain and snow. High near 41. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 41 °F

    Snow then
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow, becoming all snow after 7pm. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Rain/Snow
    then Snow

  • Monday

    Monday: Snow likely, mainly before 4pm. Mostly cloudy, with a high near 39.

    High: 39 °F

    Snow Likely

Detailed Forecast

New Year's Day
Rain and snow before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and snow after 4pm. Snow level 7100 feet. High near 42. South wind around 5 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tonight
A 10 percent chance of snow before 7pm. Partly cloudy, with a low around 18. Northwest wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 43. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Snow likely, mainly after 4am. Snow level 6800 feet. Mostly cloudy, with a low around 22. South wind around 5 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Rain and snow likely before 10am, then rain. Snow level 7500 feet. High near 43. South wind 5 to 15 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Saturday Night
Rain and snow, becoming all snow after 10pm. Snow level 6900 feet. Low around 22. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday
Snow before 1pm, then rain and snow. High near 41. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Rain and snow, becoming all snow after 7pm. Mostly cloudy, with a low around 20.
Monday
Snow likely, mainly before 4pm. Mostly cloudy, with a high near 39.
Monday Night
Snow likely, mainly after 10pm. Mostly cloudy, with a low around 14.
Tuesday
A chance of snow. Partly sunny, with a high near 38.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 13.
Wednesday
A slight chance of snow. Partly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles ENE Mammoth Lakes CA
 37.69°N 118.75°W (Elev. 6824 ft)
Last Update:
9:15 am PST Jan 1, 2026
Forecast Valid:
12pm PST Jan 1, 2026-6pm PST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation