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

Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

14°F

-10°C

Humidity 64%
Wind Speed SSW 3 MPH
Barometer NA
Dewpoint 4°F (-16°C)
Visibility NA
Last update 29 Dec 08:15 AM MST
Extended Forecast for

Mammoth Hot Springs WY

  • Today

    Today: Sunny, with a high near 31. South southeast wind 5 to 7 mph.

    High: 31 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 20. South southeast wind around 8 mph.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 38. South southeast wind 3 to 7 mph.

    High: 38 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 20. South wind 6 to 8 mph.

    Low: 20 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 43. South southeast wind 5 to 8 mph.

    High: 43 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23. South southeast wind around 8 mph.

    Low: 23 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 42. South southeast wind 6 to 8 mph.

    High: 42 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain and snow showers. Snow level 5900 feet rising to 6500 feet in the afternoon. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 31. South southeast wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 20. South southeast wind around 8 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 38. South southeast wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 20. South wind 6 to 8 mph.
Wednesday
Sunny, with a high near 43. South southeast wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 23. South southeast wind around 8 mph.
New Year's Day
Partly sunny, with a high near 42. South southeast wind 6 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
A slight chance of rain and snow showers. Snow level 5900 feet rising to 6500 feet in the afternoon. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Friday Night
A slight chance of rain and snow showers after 11pm. Snow level 6700 feet. Mostly cloudy, with a low around 33. Chance of precipitation is 20%.
Saturday
A chance of rain and snow showers. Snow level 6300 feet. Partly sunny, with a high near 42.
Saturday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 29.
Sunday
A slight chance of snow showers. Mostly cloudy, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Hot Springs WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
7:47 am MST Dec 29, 2025
Forecast Valid:
8am MST Dec 29, 2025-6pm MST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation