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

9°F

-13°C

Humidity 84%
Wind Speed N 0 MPH
Barometer 30.46 in (1031.49 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 30 Dec 10:15 AM PST
Extended Forecast for

10 Miles ESE Mammoth Lakes CA

  • Today

    Today: Partly sunny, with a high near 41. Southeast wind 10 to 15 mph becoming west in the afternoon.

    High: 41 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 25. Southwest wind around 10 mph.

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Snow likely after 10am.  Cloudy, with a high near 40. Southwest wind 5 to 10 mph becoming northwest in the afternoon.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Snow Likely

  • Wednesday Night

    Wednesday Night: Snow likely.  Cloudy, with a low around 29. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 29 °F

    Snow Likely

  • New Year's Day

    New Year's Day: Snow likely.  Mostly cloudy, with a high near 38. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 38 °F

    Snow Likely
    and Breezy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow, mainly before 4am.  Mostly cloudy, with a low around 25. Breezy, with a southwest wind around 25 mph, with gusts as high as 35 mph.  Little or no snow accumulation expected.

    Low: 25 °F

    Chance Snow
    and Breezy

  • Friday

    Friday: A 40 percent chance of snow, mainly after 10am.  Partly sunny, with a high near 37. Breezy.  New snow accumulation of 1 to 2 inches possible.

    High: 37 °F

    Chance Snow
    and Breezy

  • Friday Night

    Friday Night: Snow likely.  Mostly cloudy, with a low around 23. Very windy.

    Low: 23 °F

    Snow Likely
    and Very
    Windy

  • Saturday

    Saturday: Snow.  Mostly cloudy, with a high near 34. Very windy.

    High: 34 °F

    Snow and Very
    Windy

Detailed Forecast

Today
Partly sunny, with a high near 41. Southeast wind 10 to 15 mph becoming west in the afternoon.
Tonight
Mostly cloudy, with a low around 25. Southwest wind around 10 mph.
Wednesday
Snow likely after 10am. Cloudy, with a high near 40. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow likely. Cloudy, with a low around 29. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
New Year's Day
Snow likely. Mostly cloudy, with a high near 38. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday Night
A 40 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 25. Breezy, with a southwest wind around 25 mph, with gusts as high as 35 mph. Little or no snow accumulation expected.
Friday
A 40 percent chance of snow, mainly after 10am. Partly sunny, with a high near 37. Breezy. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow likely. Mostly cloudy, with a low around 23. Very windy.
Saturday
Snow. Mostly cloudy, with a high near 34. Very windy.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 19. Breezy.
Sunday
A chance of snow. Partly sunny, with a high near 35. Breezy.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 17.
Monday
A chance of snow. Partly sunny, with a high near 36. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles ESE Mammoth Lakes CA
 37.57°N 118.81°W (Elev. 10469 ft)
9:15 am PST Dec 30, 2025
10am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database