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

20°F

-7°C

Humidity 75%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Last update 18 Jan 11:15 PM MST
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Mostly clear, with a low around 10. Northwest wind around 5 mph becoming light and variable  after midnight.

    Low: 10 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 34. Southeast wind 3 to 8 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. South wind around 7 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow showers.  Mostly sunny, with a high near 33. South southwest wind around 6 mph becoming west in the morning.

    High: 33 °F

    Slight Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 13. Southwest wind around 6 mph.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 31. West northwest wind 3 to 6 mph.

    High: 31 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 12. South wind around 6 mph.

    Low: 12 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 10. Northwest wind around 5 mph becoming light and variable after midnight.
M.L.King Day
Sunny, with a high near 34. Southeast wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 17. South wind around 7 mph.
Tuesday
A 20 percent chance of snow showers. Mostly sunny, with a high near 33. South southwest wind around 6 mph becoming west in the morning.
Tuesday Night
Mostly clear, with a low around 13. Southwest wind around 6 mph.
Wednesday
Mostly sunny, with a high near 31. West northwest wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 12. South wind around 6 mph.
Thursday
Mostly sunny, with a high near 35.
Thursday Night
Mostly cloudy, with a low around 17.
Friday
A 30 percent chance of snow showers, mainly after 11am. Partly sunny, with a high near 32.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 14.
Saturday
A chance of snow showers. Partly sunny, with a high near 30.
Saturday Night
A slight chance of snow showers. Partly cloudy, with a low around 15.
Sunday
A slight chance of snow showers. Partly sunny, with a high near 33.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
10:47 pm MST Jan 18, 2026
11pm MST Jan 18, 2026-6pm MST Jan 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

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