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

Tracking Late Season Winter Storms

A moderate atmospheric river will continue to bring heavy snow over the Olympics, northern Cascades and northern Rockies Friday while heavy rain may bring flooding to coastal Oregon and Washington. A winter storm will continue to push across the Great Lakes and Northeast U.S. Friday and Saturday with areas of heavy snow and high winds. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

49°F

9°C

Humidity 28%
Wind Speed NW 3 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Last update 12 Mar 07:15 PM MDT
Extended Forecast for

Mammoth WY

Winter Weather Advisory March 12, 07:54pm until March 13, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory March 12, 07:54pm until March 13, 12:00am

    NOW until 12:00am Fri

    Winter Weather Advisory

  • Tonight

    Low: 38 °F

    Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain showers before 11am, then a chance of rain and snow showers. Snow level 6300 feet rising to 7400 feet in the afternoon. Mostly cloudy, with a high near 48. Breezy, with a south southeast wind 8 to 18 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 48 °F

    Chance
    Rain/Snow and
    Breezy

  • Friday Night

    Friday Night: Rain, possibly mixed with snow showers before 9pm, then rain showers between 9pm and midnight, then rain and snow showers likely after midnight. Snow level 7400 feet lowering to 6500 feet after midnight . Low around 39. Breezy, with a west northwest wind 13 to 15 mph becoming southwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 39 °F

    Rain/Snow and
    Breezy

  • Saturday

    Saturday: Rain and snow showers, becoming all snow after 3pm. Some thunder is also possible. Snow level 6300 feet lowering to 5700 feet in the afternoon . High near 44. Breezy, with a southwest wind 14 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow and
    Breezy

  • Saturday Night

    Saturday Night: Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 14. Blustery, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 14 °F

    Snow Showers
    Likely and
    Blustery then
    Chance Snow
    Showers

  • Sunday

    Sunday: A 20 percent chance of snow showers after noon. Partly sunny, with a high near 33. West northwest wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 33 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of snow showers, mainly after midnight. Mostly cloudy, with a low around 23. South southwest wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Chance Snow
    Showers

  • Monday

    Monday: A chance of snow showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 45. Chance of precipitation is 50%.

    High: 45 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
A chance of rain and snow showers before 5am, then a chance of rain showers. Snow level 6200 feet. Mostly cloudy, with a low around 38. West wind 6 to 10 mph becoming east in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
A chance of rain showers before 11am, then a chance of rain and snow showers. Snow level 6300 feet rising to 7400 feet in the afternoon. Mostly cloudy, with a high near 48. Breezy, with a south southeast wind 8 to 18 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday Night
Rain, possibly mixed with snow showers before 9pm, then rain showers between 9pm and midnight, then rain and snow showers likely after midnight. Snow level 7400 feet lowering to 6500 feet after midnight . Low around 39. Breezy, with a west northwest wind 13 to 15 mph becoming southwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Saturday
Rain and snow showers, becoming all snow after 3pm. Some thunder is also possible. Snow level 6300 feet lowering to 5700 feet in the afternoon . High near 44. Breezy, with a southwest wind 14 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Saturday Night
Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 14. Blustery, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Sunday
A 20 percent chance of snow showers after noon. Partly sunny, with a high near 33. West northwest wind 6 to 10 mph, with gusts as high as 22 mph.
Sunday Night
A 40 percent chance of snow showers, mainly after midnight. Mostly cloudy, with a low around 23. South southwest wind 7 to 9 mph, with gusts as high as 21 mph.
Monday
A chance of snow showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 45. Chance of precipitation is 50%.
Monday Night
A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Sunny, with a high near 64.
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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:
7:35 pm MDT Mar 12, 2026
Forecast Valid:
7pm MDT Mar 12, 2026-6pm MDT Mar 19, 2026
 
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Additional Resources

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