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

Mammoth Yosemite Airport (KMMH)

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

Clear

3°F

-16°C

Humidity 84%
Wind Speed N 0 MPH
Barometer 30.44 in (1030.82 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Last update 30 Dec 07:55 AM PST
Extended Forecast for

4 Miles ENE Mammoth Lakes CA

  • Today

    Today: Partly sunny, with a high near 44. Calm wind becoming north around 5 mph.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Snow likely after 10am, mixing with rain after 1pm.  Cloudy, with a high near 44. Calm wind becoming east around 5 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 44 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain likely.  Snow level 8900 feet rising to 9400 feet after midnight. Cloudy, with a low around 31. Calm wind becoming south around 5 mph.  Chance of precipitation is 60%.

    Low: 31 °F

    Rain Likely

  • New Year's Day

    New Year's Day: Rain likely.  Snow level 8800 feet. Cloudy, with a high near 43. South wind around 5 mph.  Chance of precipitation is 60%.

    High: 43 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow, mainly before 4am.  Snow level 8200 feet. Mostly cloudy, with a low around 28. Southwest wind around 5 mph.  Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 28 °F

    Chance
    Rain/Snow

  • Friday

    Friday: Rain likely, possibly mixed with snow, mainly after 4pm.  Partly sunny, with a high near 42. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain and snow likely, becoming all snow after 7pm.  Mostly cloudy, with a low around 26.

    Low: 26 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Saturday

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

    High: 39 °F

    Snow

Detailed Forecast

Today
Partly sunny, with a high near 44. Calm wind becoming north around 5 mph.
Tonight
Mostly cloudy, with a low around 24. Calm wind.
Wednesday
Snow likely after 10am, mixing with rain after 1pm. Cloudy, with a high near 44. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Rain likely. Snow level 8900 feet rising to 9400 feet after midnight. Cloudy, with a low around 31. Calm wind becoming south around 5 mph. Chance of precipitation is 60%.
New Year's Day
Rain likely. Snow level 8800 feet. Cloudy, with a high near 43. South wind around 5 mph. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow, mainly before 4am. Snow level 8200 feet. Mostly cloudy, with a low around 28. Southwest wind around 5 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Friday
Rain likely, possibly mixed with snow, mainly after 4pm. Partly sunny, with a high near 42. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Rain and snow likely, becoming all snow after 7pm. Mostly cloudy, with a low around 26.
Saturday
Snow. Mostly cloudy, with a high near 39.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 21.
Sunday
A chance of snow. Partly sunny, with a high near 40.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 19.
Monday
A chance of snow. Partly sunny, with a high near 42.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Mammoth Lakes CA
 37.67°N 118.89°W (Elev. 7671 ft)
1:15 am PST Dec 30, 2025
8am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
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Additional Resources

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