National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

14°F

-10°C

Humidity 75%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 7°F (-14°C)
Visibility NA
Wind Chill7°F (-14°C)
Last update 22 Jan 03:15 AM MST
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Partly cloudy, with a low around 10. South southeast wind around 5 mph.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 27. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 27 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 6. Light north wind.

    Low: 6 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 19. Wind chill values as low as -5. North northwest wind 3 to 7 mph.

    High: 19 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around -1. North northwest wind around 6 mph becoming calm in the evening.

    Low: -1 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 22. Light and variable wind becoming northwest around 6 mph in the afternoon.

    High: 22 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 7. West southwest wind around 6 mph.

    Low: 7 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 28.

    High: 28 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 10. South southeast wind around 5 mph.
Thursday
Partly sunny, with a high near 27. Calm wind becoming northwest around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 6. Light north wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 19. Wind chill values as low as -5. North northwest wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around -1. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 22. Light and variable wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 7. West southwest wind around 6 mph.
Sunday
Sunny, with a high near 28.
Sunday Night
Mostly clear, with a low around 8.
Monday
Sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
3:01 am MST Jan 22, 2026
Forecast Valid:
3am MST Jan 22, 2026-6pm MST Jan 28, 2026
 
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