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

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

56°F

13°C

Humidity 29%
Wind Speed SSE 5 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 21 Apr 10:15 AM MDT
Extended Forecast for

Mammoth WY

Winter Weather Advisory April 22, 12:00pm until April 23, 11:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Increasing clouds, with a high near 70. Breezy, with a south southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 70 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Isolated showers between 8pm and 10pm. Partly cloudy, with a low around 42. Breezy, with a southeast wind 12 to 17 mph becoming south 6 to 11 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Isolated
    Showers and
    Breezy then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers likely after 3pm. Increasing clouds, with a high near 55. Breezy, with a southeast wind 9 to 18 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%.

    High: 55 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow showers before midnight, then snow showers between midnight and 3am, then rain and snow showers after 3am. Snow level 6900 feet lowering to 5700 feet after midnight . Low around 35. Breezy, with a southwest wind 9 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Snow showers. Some thunder is also possible. High near 44. West northwest wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Snow Showers

  • Thursday Night

    Thursday Night: Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 23. North northwest wind 6 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 23 °F

    Snow Showers
    Likely

  • Friday

    Friday: Snow showers likely. Some thunder is also possible. Partly sunny, with a high near 38. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    High: 38 °F

    Snow Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of snow showers before midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow showers after noon. Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Today
Increasing clouds, with a high near 70. Breezy, with a south southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tonight
Isolated showers between 8pm and 10pm. Partly cloudy, with a low around 42. Breezy, with a southeast wind 12 to 17 mph becoming south 6 to 11 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers likely after 3pm. Increasing clouds, with a high near 55. Breezy, with a southeast wind 9 to 18 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%.
Wednesday Night
Rain, possibly mixed with snow showers before midnight, then snow showers between midnight and 3am, then rain and snow showers after 3am. Snow level 6900 feet lowering to 5700 feet after midnight . Low around 35. Breezy, with a southwest wind 9 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Snow showers. Some thunder is also possible. High near 44. West northwest wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 23. North northwest wind 6 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Friday
Snow showers likely. Some thunder is also possible. Partly sunny, with a high near 38. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of snow showers before midnight. Mostly cloudy, with a low around 19.
Saturday
A 20 percent chance of snow showers after noon. Mostly sunny, with a high near 44.
Saturday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 24.
Sunday
A chance of snow showers. Partly sunny, with a high near 47.
Sunday Night
A slight chance of snow showers. Mostly cloudy, with a low around 27.
Monday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 51.
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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:
8:48 am MDT Apr 21, 2026
Forecast Valid:
10am MDT Apr 21, 2026-6pm MDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation