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

4°F

-16°C

Humidity 72%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint -3°F (-19°C)
Visibility NA
Wind Chill-4°F (-20°C)
Last update 23 Jan 10:15 AM MST
Extended Forecast for

Mammoth WY

  • Today

    Today: Sunny, with a high near 13. Wind chill values as low as -5. Northwest wind 6 to 8 mph.

    High: 13 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -3. North northwest wind around 6 mph becoming calm  in the evening.

    Low: -3 °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: A 20 percent chance of snow showers after 11pm.  Mostly cloudy, with a low around 6. West wind around 6 mph.

    Low: 6 °F

    Slight Chance
    Snow Showers

  • Sunday

    Sunday: Sunny, with a high near 24. West wind around 6 mph.

    High: 24 °F

    Sunny

  • Sunday Night

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

    Low: 8 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 31. South wind around 7 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 13. Wind chill values as low as -5. Northwest wind 6 to 8 mph.
Tonight
Mostly clear, with a low around -3. 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
A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 6. West wind around 6 mph.
Sunday
Sunny, with a high near 24. West wind around 6 mph.
Sunday Night
Mostly clear, with a low around 8. South wind around 7 mph.
Monday
Mostly sunny, with a high near 31. South wind around 7 mph.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Mostly sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 15.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 37.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
10:31 am MST Jan 23, 2026
10am MST Jan 23, 2026-6pm MST Jan 29, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database