Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

21°F

-6°C

Humidity 68%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 20 Jan 05:15 AM MST
Extended Forecast for

5 Miles WNW Mount Holmes WY

  • Today

    Today: A slight chance of snow showers between 10am and 2pm.  Partly sunny, with a high near 17. Wind chill values as low as -5. Southwest wind 9 to 11 mph.  Chance of precipitation is 20%.

    High: 17 °F

    Slight Chance
    Snow Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 4. Wind chill values as low as -10. Southwest wind 6 to 8 mph becoming east southeast after midnight.

    Low: 4 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 18. Wind chill values as low as -5. West southwest wind 5 to 7 mph.

    High: 18 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 4. Wind chill values as low as -5. South southwest wind around 6 mph.

    Low: 4 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 19. South southwest wind around 6 mph becoming west northwest in the afternoon.

    High: 19 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 2. North wind 3 to 5 mph.

    Low: 2 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 16. North northwest wind 3 to 6 mph.

    High: 16 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around -5.

    Low: -5 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 15.

    High: 15 °F

    Sunny

Detailed Forecast

Today
A slight chance of snow showers between 10am and 2pm. Partly sunny, with a high near 17. Wind chill values as low as -5. Southwest wind 9 to 11 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 4. Wind chill values as low as -10. Southwest wind 6 to 8 mph becoming east southeast after midnight.
Wednesday
Mostly sunny, with a high near 18. Wind chill values as low as -5. West southwest wind 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 4. Wind chill values as low as -5. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 19. South southwest wind around 6 mph becoming west northwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 2. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 16. North northwest wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around -5.
Saturday
Sunny, with a high near 15.
Saturday Night
Partly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 17.
Sunday Night
A slight chance of snow showers. Mostly cloudy, with a low around 7.
Monday
A slight chance of snow showers. Partly sunny, with a high near 21.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Mount Holmes WY
 44.83°N 110.94°W (Elev. 8369 ft)
5:18 am MST Jan 20, 2026
6am MST Jan 20, 2026-6pm MST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database