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

34°F

1°C

Humidity 84%
Wind Speed S 4 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Wind Chill30°F (-1°C)
Last update 01 Jan 11:15 PM MST
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Scattered rain and snow showers. Snow level 5800 feet. Mostly cloudy, with a low around 33. South wind 5 to 7 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 33 °F

    Scattered
    Rain/Snow

  • Friday

    Friday: Scattered rain and snow showers, mainly before 10am. Snow level 5900 feet rising to 6800 feet in the afternoon. Mostly cloudy, with a high near 40. South wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 40 °F

    Scattered
    Rain/Snow
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. South southwest wind around 9 mph.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 45. South wind 8 to 10 mph, with gusts as high as 24 mph.

    High: 45 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain showers before 8pm, then a chance of rain and snow showers. Snow level 6400 feet. Mostly cloudy, with a low around 34. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 34 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow showers. Snow level 6200 feet. Mostly cloudy, with a high near 42. South southwest wind 10 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    High: 42 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain and snow showers. Snow level 6100 feet. Mostly cloudy, with a low around 33. South wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Rain/Snow

  • Monday

    Monday: A chance of rain and snow showers before 11am, then a chance of snow showers. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.

    High: 40 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Monday Night

    Monday Night: A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Scattered rain and snow showers. Snow level 5800 feet. Mostly cloudy, with a low around 33. South wind 5 to 7 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
Scattered rain and snow showers, mainly before 10am. Snow level 5900 feet rising to 6800 feet in the afternoon. Mostly cloudy, with a high near 40. South wind 3 to 8 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 35. South southwest wind around 9 mph.
Saturday
Partly sunny, with a high near 45. South wind 8 to 10 mph, with gusts as high as 24 mph.
Saturday Night
A slight chance of rain showers before 8pm, then a chance of rain and snow showers. Snow level 6400 feet. Mostly cloudy, with a low around 34. 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 6200 feet. Mostly cloudy, with a high near 42. South southwest wind 10 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Sunday Night
A chance of rain and snow showers. Snow level 6100 feet. Mostly cloudy, with a low around 33. South wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Monday
A chance of rain and snow showers before 11am, then a chance of snow showers. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.
Monday Night
A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 26.
Tuesday
A 20 percent chance of snow showers after 11am. Partly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
A chance of snow showers. Partly sunny, with a high near 36.
Wednesday Night
A slight chance of snow showers. Mostly cloudy, with a low around 19.
Thursday
A chance of snow showers. Partly sunny, with a high near 33.
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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:
10:47 pm MST Jan 1, 2026
Forecast Valid:
12am MST Jan 2, 2026-6pm MST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation