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 >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

25°F

-4°C

Humidity 50%
Wind Speed S 7 MPH
Barometer NA
Dewpoint 9°F (-13°C)
Visibility NA
Wind Chill17°F (-8°C)
Last update 21 Jan 08:15 PM MST
Extended Forecast for

Mammoth WY

  • Tonight

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

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 26. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 26 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 7. Light north wind.

    Low: 7 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of snow showers. Mostly sunny, with a high near 21. Wind chill values as low as zero. North northwest wind 5 to 8 mph.

    High: 21 °F

    Slight Chance
    Snow Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around -1. North northwest wind 5 to 7 mph becoming light and variable in the evening.

    Low: -1 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 23. Light and variable wind becoming northwest around 6 mph in the afternoon.

    High: 23 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 5. Southwest wind around 6 mph.

    Low: 5 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 6.

    Low: 6 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 10. South southeast wind around 5 mph.
Thursday
Mostly sunny, with a high near 26. Calm wind becoming northwest around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 7. Light north wind.
Friday
A 20 percent chance of snow showers. Mostly sunny, with a high near 21. Wind chill values as low as zero. North northwest wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around -1. North northwest wind 5 to 7 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 23. Light and variable wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 5. Southwest wind around 6 mph.
Sunday
Mostly sunny, with a high near 25.
Sunday Night
Mostly clear, with a low around 6.
Monday
Sunny, with a high near 30.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 14.
Wednesday
Mostly sunny, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
7:47 pm MST Jan 21, 2026
Forecast Valid:
9pm MST Jan 21, 2026-6pm MST Jan 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation