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 >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

12°F

-11°C

Humidity 73%
Wind Speed SSW 3 MPH
Barometer NA
Dewpoint 5°F (-15°C)
Visibility NA
Last update 19 Jan 07:15 AM MST
Extended Forecast for

Mammoth WY

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 34. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 18. South southwest wind around 7 mph.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 32. South wind around 5 mph becoming calm  in the morning.

    High: 32 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12. South southwest wind around 5 mph.

    Low: 12 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 32. Light west wind.

    High: 32 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. South wind 3 to 5 mph.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 34. South wind around 5 mph becoming calm.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

M.L.King Day
Sunny, with a high near 34. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 18. South southwest wind around 7 mph.
Tuesday
Mostly sunny, with a high near 32. South wind around 5 mph becoming calm in the morning.
Tuesday Night
Mostly clear, with a low around 12. South southwest wind around 5 mph.
Wednesday
Mostly sunny, with a high near 32. Light west wind.
Wednesday Night
Partly cloudy, with a low around 13. South wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 34. South wind around 5 mph becoming calm.
Thursday Night
Partly cloudy, with a low around 11.
Friday
Mostly sunny, with a high near 31.
Friday Night
Mostly clear, with a low around 11.
Saturday
Mostly sunny, with a high near 32.
Saturday Night
Partly cloudy, with a low around 15.
Sunday
A slight chance of snow showers. Mostly sunny, with a high near 34.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
7:33 am MST Jan 19, 2026
8am MST Jan 19, 2026-6pm MST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database