Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East; Severe Storm Threat in the Gulf States Sunday

A significant winter storm is underway, bringing widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Extremely cold air will follow, prolonging dangerous travel and infrastructure impacts into next week. Severe thunderstorms may produce damaging gusts and tornadoes across the eastern Gulf Coast states Sunday morning and afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

10°F

-12°C

Humidity 82%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 5°F (-15°C)
Visibility NA
Last update 25 Jan 03:15 AM MST
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: A 20 percent chance of snow showers.  Mostly cloudy, with a low around 9. Wind chill values as low as zero. West northwest wind around 5 mph.

    Low: 9 °F

    Slight Chance
    Snow Showers

  • Sunday

    Sunday: A 10 percent chance of snow showers before 7am.  Partly sunny, then gradually becoming sunny, with a high near 15. Wind chill values as low as -5. Northwest wind 5 to 10 mph becoming light west northwest  in the afternoon.

    High: 15 °F

    Slight Chance
    Snow Showers
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 7. Wind chill values as low as -5. South southeast wind 6 to 9 mph.

    Low: 7 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values as low as -5. South southwest wind 7 to 9 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 13. South wind around 7 mph.

    Low: 13 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35. South wind around 6 mph.

    High: 35 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 13. South wind around 7 mph.

    Low: 13 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow showers. Mostly cloudy, with a low around 9. Wind chill values as low as zero. West northwest wind around 5 mph.
Sunday
A 10 percent chance of snow showers before 7am. Partly sunny, then gradually becoming sunny, with a high near 15. Wind chill values as low as -5. Northwest wind 5 to 10 mph becoming light west northwest in the afternoon.
Sunday Night
Clear, with a low around 7. Wind chill values as low as -5. South southeast wind 6 to 9 mph.
Monday
Sunny, with a high near 29. Wind chill values as low as -5. South southwest wind 7 to 9 mph.
Monday Night
Mostly cloudy, with a low around 13. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 35. South wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 13. South wind around 7 mph.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
Mostly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 40.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
2:31 am MST Jan 25, 2026
4am MST Jan 25, 2026-6pm MST Jan 31, 2026
 
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Additional Resources

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Hourly Weather Forecast

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