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

39°F

4°C

Humidity 70%
Wind Speed SSW 6 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 03 Jan 05:15 AM MST
Extended Forecast for

Mammoth WY

Winter Weather Advisory January 3, 11:00pm until January 5, 11:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: A 30 percent chance of showers, mainly between 1pm and 4pm. Snow level 6400 feet rising to 7300 feet in the afternoon. Partly sunny, with a high near 42. East southeast wind 7 to 10 mph, with gusts as high as 23 mph.

    High: 42 °F

    Chance
    Showers

  • Tonight

    Tonight: Rain and snow showers likely, mainly between 9pm and 1am. Snow level 6100 feet. Mostly cloudy, with a low around 35. Breezy, with an east southeast wind 8 to 13 mph becoming southwest 16 to 21 mph after midnight. Winds could gust as high as 44 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow
    Likely and
    Breezy

  • Sunday

    Sunday: A chance of rain and snow showers, mainly after 11am. Snow level 6100 feet. Partly sunny, with a high near 42. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 42 °F

    Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain and snow showers before 2am, then a slight chance of snow showers. Snow level 5800 feet. Mostly cloudy, with a low around 33. South southwest wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Rain/Snow

  • Monday

    Monday: A 40 percent chance of snow showers. Mostly cloudy, with a high near 40. South southwest wind 9 to 11 mph, with gusts as high as 25 mph. Little or no snow accumulation expected.

    High: 40 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of snow showers. Mostly cloudy, with a low around 29. South southwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 29 °F

    Chance Snow
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of snow showers. Mostly cloudy, with a high near 36. Breezy, with a southwest wind 10 to 15 mph, with gusts as high as 31 mph.

    High: 36 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Slight Chance
    Snow Showers

  • Wednesday

    Wednesday: Snow showers likely, mainly after 11am. Mostly cloudy, with a high near 35. Chance of precipitation is 60%.

    High: 35 °F

    Snow Showers
    Likely

Detailed Forecast

Today
A 30 percent chance of showers, mainly between 1pm and 4pm. Snow level 6400 feet rising to 7300 feet in the afternoon. Partly sunny, with a high near 42. East southeast wind 7 to 10 mph, with gusts as high as 23 mph.
Tonight
Rain and snow showers likely, mainly between 9pm and 1am. Snow level 6100 feet. Mostly cloudy, with a low around 35. Breezy, with an east southeast wind 8 to 13 mph becoming southwest 16 to 21 mph after midnight. Winds could gust as high as 44 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Sunday
A chance of rain and snow showers, mainly after 11am. Snow level 6100 feet. Partly sunny, with a high near 42. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday Night
A chance of rain and snow showers before 2am, then a slight chance of snow showers. Snow level 5800 feet. Mostly cloudy, with a low around 33. South southwest wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Monday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 40. South southwest wind 9 to 11 mph, with gusts as high as 25 mph. Little or no snow accumulation expected.
Monday Night
A 30 percent chance of snow showers. Mostly cloudy, with a low around 29. South southwest wind around 10 mph, with gusts as high as 22 mph.
Tuesday
A 20 percent chance of snow showers. Mostly cloudy, with a high near 36. Breezy, with a southwest wind 10 to 15 mph, with gusts as high as 31 mph.
Tuesday Night
A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 28.
Wednesday
Snow showers likely, mainly after 11am. Mostly cloudy, with a high near 35. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of snow showers, mainly before 11pm. Mostly cloudy, with a low around 13.
Thursday
A chance of snow showers. Partly sunny, with a high near 29.
Thursday Night
Mostly cloudy, with a low around 9.
Friday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
5:32 am MST Jan 3, 2026
Forecast Valid:
5am MST Jan 3, 2026-6pm MST Jan 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation