Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East

A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

20°F

-7°C

Humidity 66%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 11°F (-12°C)
Visibility NA
Wind Chill10°F (-12°C)
Last update 22 Jan 05:15 PM MST
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Increasing clouds, with a low around 7. Calm wind.

    Low: 7 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 18. Northwest wind 5 to 8 mph, with gusts as high as 20 mph.

    High: 18 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around -1. North northwest wind around 6 mph becoming calm  in the evening.

    Low: -1 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 21. Wind chill values as low as -10. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 21 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 4. West northwest wind around 6 mph.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 26. Southwest wind around 6 mph.

    High: 26 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7. South wind around 8 mph.

    Low: 7 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 31.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 7. Calm wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 18. Northwest wind 5 to 8 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around -1. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 21. Wind chill values as low as -10. Calm wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 4. West northwest wind around 6 mph.
Sunday
Sunny, with a high near 26. Southwest wind around 6 mph.
Sunday Night
Mostly clear, with a low around 7. South wind around 8 mph.
Monday
Sunny, with a high near 31.
Monday Night
Mostly cloudy, with a low around 14.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
4:47 pm MST Jan 22, 2026
5pm MST Jan 22, 2026-6pm MST Jan 29, 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