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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

32°F

0°C

Humidity 90%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 02 Jan 06:15 AM MST
Extended Forecast for

Mammoth WY

  • Today

    Today: A chance of rain and snow showers before noon, then a chance of rain showers between noon and 5pm. Snow level rising to 6700 feet in the afternoon. Mostly cloudy, with a high near 40. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.

    High: 40 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Tonight

    Tonight: A chance of rain and snow showers, mainly before 11pm. Snow level 6100 feet. Mostly cloudy, with a low around 34. South southwest wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 34 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: Partly sunny, with a high near 44. South wind 8 to 10 mph, with gusts as high as 24 mph.

    High: 44 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain and snow showers before 2am, then a chance of rain showers between 2am and 5am, then a chance of rain and snow showers after 5am. Snow level 6300 feet. Mostly cloudy, with a low around 35. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 35 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow showers. Snow level 6100 feet. Mostly cloudy, with a high near 42. South southwest wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 42 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain and snow showers before 11pm, then a slight chance of snow showers between 11pm and 2am, then a slight chance of rain and snow showers after 2am. Snow level 5800 feet. Mostly cloudy, with a low around 32. South southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Rain/Snow

  • Monday

    Monday: A 50 percent chance of snow showers. Mostly cloudy, with a high near 39. South southwest wind around 11 mph, with gusts as high as 25 mph.

    High: 39 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow showers after 11am. Partly sunny, with a high near 36.

    High: 36 °F

    Slight Chance
    Snow Showers

Detailed Forecast

Today
A chance of rain and snow showers before noon, then a chance of rain showers between noon and 5pm. Snow level rising to 6700 feet in the afternoon. Mostly cloudy, with a high near 40. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.
Tonight
A chance of rain and snow showers, mainly before 11pm. Snow level 6100 feet. Mostly cloudy, with a low around 34. South southwest wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 44. South wind 8 to 10 mph, with gusts as high as 24 mph.
Saturday Night
A chance of rain and snow showers before 2am, then a chance of rain showers between 2am and 5am, then a chance of rain and snow showers after 5am. Snow level 6300 feet. Mostly cloudy, with a low around 35. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Sunday
A chance of rain and snow showers. Snow level 6100 feet. Mostly cloudy, with a high near 42. South southwest wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Sunday Night
A chance of rain and snow showers before 11pm, then a slight chance of snow showers between 11pm and 2am, then a slight chance of rain and snow showers after 2am. Snow level 5800 feet. Mostly cloudy, with a low around 32. South southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Monday
A 50 percent chance of snow showers. Mostly cloudy, with a high near 39. South southwest wind around 11 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 27.
Tuesday
A 20 percent chance of snow showers after 11am. Partly sunny, with a high near 36.
Tuesday Night
A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 28.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 35.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 19.
Thursday
A chance of snow showers. Partly sunny, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
5:47 am MST Jan 2, 2026
Forecast Valid:
6am MST Jan 2, 2026-6pm MST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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