Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. 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 60%
Wind Speed S 4 MPH
Barometer NA
Dewpoint 2°F (-17°C)
Visibility NA
Wind Chill7°F (-14°C)
Last update 29 Dec 03:15 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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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Hot Springs WY
 44.98°N 110.69°W (Elev. 5745 ft)
2:32 am MST Dec 29, 2025
4am MST Dec 29, 2025-6pm MST Jan 4, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database