Heavy Great Lakes Snow through Friday; Watching Potential for Major Winter Storm Late Week into this Weekend

Heavy lake effect snow will continue in the Great Lakes into Wednesday before another storm brings a widespread general snow followed by another round of heavy lake effect snow. A wide-ranging winter storm will produce great swaths of heavy snow, sleet, and treacherous freezing rain from the southern Rockies/Plains and Mid-South starting Friday and shifting toward the East Coast through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

28°F

-2°C

Humidity 58%
Wind Speed NNW 6 MPH
Barometer NA
Dewpoint 15°F (-9°C)
Visibility NA
Wind Chill21°F (-6°C)
Last update 20 Jan 02:15 PM MST
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 25. Northwest wind around 9 mph.

    High: 25 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 10. South southeast wind around 6 mph.

    Low: 10 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 28. South wind around 6 mph becoming calm  in the morning.

    High: 28 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12. South wind 3 to 5 mph.

    Low: 12 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 31. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 31 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8. North northeast wind 3 to 5 mph.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 25. North northwest wind 3 to 7 mph.

    High: 25 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 26.

    High: 26 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 25. Northwest wind around 9 mph.
Tonight
Mostly clear, with a low around 10. South southeast wind around 6 mph.
Wednesday
Mostly sunny, with a high near 28. South wind around 6 mph becoming calm in the morning.
Wednesday Night
Partly cloudy, with a low around 12. South wind 3 to 5 mph.
Thursday
Sunny, with a high near 31. Calm wind becoming north northwest around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 8. North northeast wind 3 to 5 mph.
Friday
Sunny, with a high near 25. North northwest wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 1.
Saturday
Sunny, with a high near 26.
Saturday Night
Partly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 29.
Sunday Night
Partly cloudy, with a low around 12.
Monday
Mostly sunny, with a high near 33.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
2:31 pm MST Jan 20, 2026
2pm MST Jan 20, 2026-6pm MST Jan 26, 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