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

24°F

-4°C

Humidity 59%
Wind Speed S 7 MPH
Barometer NA
Dewpoint 11°F (-12°C)
Visibility NA
Wind Chill16°F (-9°C)
Last update 19 Jan 11:15 PM MST
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Mostly clear, with a low around 17. South southeast wind 8 to 11 mph.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of snow showers between 11am and noon.  Mostly cloudy, then gradually becoming sunny, with a high near 30. South wind 6 to 13 mph becoming north northwest in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    High: 30 °F

    Slight Chance
    Snow Showers
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12. South southeast wind 7 to 9 mph.

    Low: 12 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 32. South wind around 5 mph becoming calm.

    High: 32 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12. South wind around 6 mph.

    Low: 12 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 32. South wind around 5 mph becoming calm.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 10. North northwest wind around 5 mph becoming light and variable  in the evening.

    Low: 10 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 3.

    Low: 3 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 17. South southeast wind 8 to 11 mph.
Tuesday
A slight chance of snow showers between 11am and noon. Mostly cloudy, then gradually becoming sunny, with a high near 30. South wind 6 to 13 mph becoming north northwest in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 12. South southeast wind 7 to 9 mph.
Wednesday
Sunny, with a high near 32. South wind around 5 mph becoming calm.
Wednesday Night
Partly cloudy, with a low around 12. South wind around 6 mph.
Thursday
Mostly sunny, with a high near 32. South wind around 5 mph becoming calm.
Thursday Night
Partly cloudy, with a low around 10. North northwest wind around 5 mph becoming light and variable in the evening.
Friday
Mostly sunny, with a high near 28.
Friday Night
Mostly clear, with a low around 3.
Saturday
Sunny, with a high near 29.
Saturday Night
Partly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 32.
Sunday Night
Partly cloudy, with a low around 17.
Monday
A slight chance of snow showers. Partly sunny, with a high near 35.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
11:47 pm MST Jan 19, 2026
12am MST Jan 20, 2026-6pm MST Jan 26, 2026
 
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Additional Resources

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