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

23°F

-5°C

Humidity 84%
Wind Speed NNE 3 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 20 Jan 12:15 PM MST
Extended Forecast for

5 Miles SSW Mammoth Hot Springs WY

  • This Afternoon

    This Afternoon: A 30 percent chance of snow showers before 1pm.  Mostly sunny, with a high near 20. North northwest wind 6 to 9 mph.

    High: 20 °F

    Chance Snow
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 3. Wind chill values as low as -10. South southwest wind 7 to 9 mph.

    Low: 3 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 22. Wind chill values as low as -10. South southwest wind around 8 mph.

    High: 22 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 5. South southwest wind 3 to 6 mph.

    Low: 5 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 23. Light and variable wind becoming northwest around 6 mph in the morning.

    High: 23 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 1. North northwest wind 3 to 5 mph.

    Low: 1 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 18. North northwest wind 5 to 7 mph.

    High: 18 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around -7.

    Low: -7 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of snow showers before 1pm. Mostly sunny, with a high near 20. North northwest wind 6 to 9 mph.
Tonight
Mostly clear, with a low around 3. Wind chill values as low as -10. South southwest wind 7 to 9 mph.
Wednesday
Mostly sunny, with a high near 22. Wind chill values as low as -10. South southwest wind around 8 mph.
Wednesday Night
Mostly cloudy, with a low around 5. South southwest wind 3 to 6 mph.
Thursday
Sunny, with a high near 23. Light and variable wind becoming northwest around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around 1. North northwest wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 18. North northwest wind 5 to 7 mph.
Friday Night
Mostly clear, with a low around -7.
Saturday
Mostly sunny, with a high near 17.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
Mostly sunny, with a high near 21.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Mostly sunny, with a high near 25.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Mammoth Hot Springs WY
 44.89°N 110.74°W (Elev. 7402 ft)
12:31 pm MST Jan 20, 2026
12pm 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