Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Current conditions at

DW5868 Mammoth Lakes (D5868)

Lat: 37.625°NLon: 118.98°WElev: 7973.0ft.

NA

44°F

7°C

Humidity 24%
Wind Speed E 0 MPH
Barometer 30.5 in (1032.85 mb)
Dewpoint 9°F (-13°C)
Visibility NA
Last update 30 Dec 11:15 AM PST
Extended Forecast for

Mammoth Lakes CA

  • Today

    Today: Mostly cloudy, with a high near 45. Calm wind.

    High: 45 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain and snow likely after 10am.  Snow level 8100 feet rising to 8900 feet in the afternoon. Cloudy, with a high near 45. Calm wind.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 45 °F

    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all rain after 10pm.  Snow level 9400 feet. Cloudy, with a low around 33. Calm wind becoming south around 5 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 33 °F

    Rain/Snow
    Likely then
    Rain Likely

  • New Year's Day

    New Year's Day: Rain likely before 1pm, then rain and snow likely.  Snow level 8800 feet. Cloudy, with a high near 43. South wind around 5 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 43 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow, mainly before 4am.  Snow level 8200 feet. Mostly cloudy, with a low around 30. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 30 °F

    Chance
    Rain/Snow

  • Friday

    Friday: A slight chance of rain and snow before 7am, then a chance of snow.  Partly sunny, with a high near 42. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    High: 42 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow likely.  Mostly cloudy, with a low around 28.

    Low: 28 °F

    Snow Likely

  • Saturday

    Saturday: Snow.  Mostly cloudy, with a high near 39.

    High: 39 °F

    Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 45. Calm wind.
Tonight
Mostly cloudy, with a low around 28. Calm wind.
Wednesday
Rain and snow likely after 10am. Snow level 8100 feet rising to 8900 feet in the afternoon. Cloudy, with a high near 45. Calm wind. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow likely, becoming all rain after 10pm. Snow level 9400 feet. Cloudy, with a low around 33. Calm wind becoming south around 5 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
New Year's Day
Rain likely before 1pm, then rain and snow likely. Snow level 8800 feet. Cloudy, with a high near 43. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow, mainly before 4am. Snow level 8200 feet. Mostly cloudy, with a low around 30. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Friday
A slight chance of rain and snow before 7am, then a chance of snow. Partly sunny, with a high near 42. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Friday Night
Snow likely. Mostly cloudy, with a low around 28.
Saturday
Snow. Mostly cloudy, with a high near 39.
Saturday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 22.
Sunday
A chance of snow. Partly sunny, with a high near 39.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 20.
Monday
A chance of snow. Partly sunny, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Lakes CA
 37.64°N 118.97°W (Elev. 7913 ft)
9:15 am PST Dec 30, 2025
11am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
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Additional Resources

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