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 >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

21°F

-6°C

Humidity 68%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 20 Jan 04:15 AM MST
Extended Forecast for

5 Miles SSW Mammoth Hot Springs WY

  • Today

    Today: A 30 percent chance of snow showers, mainly before 1pm.  Mostly cloudy, then becoming sunny during the afternoon, with a high near 23. Wind chill values as low as zero. South wind 7 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 23 °F

    Chance Snow
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 6. Wind chill values as low as -10. South wind 9 to 14 mph, with gusts as high as 21 mph.

    Low: 6 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24. Wind chill values as low as -5. South southwest wind around 6 mph.

    High: 24 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 5. Wind chill values as low as -5. South southwest wind around 6 mph.

    Low: 5 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 24. South wind around 6 mph becoming west northwest in the afternoon.

    High: 24 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 3. Northwest wind around 5 mph becoming light and variable  in the evening.

    Low: 3 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 21. Northeast wind around 6 mph becoming northwest in the afternoon.

    High: 21 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around -5.

    Low: -5 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 21.

    High: 21 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of snow showers, mainly before 1pm. Mostly cloudy, then becoming sunny during the afternoon, with a high near 23. Wind chill values as low as zero. South wind 7 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 6. Wind chill values as low as -10. South wind 9 to 14 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 24. Wind chill values as low as -5. South southwest wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 5. Wind chill values as low as -5. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 24. South wind around 6 mph becoming west northwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 3. Northwest wind around 5 mph becoming light and variable in the evening.
Friday
Mostly sunny, with a high near 21. Northeast wind around 6 mph becoming northwest in the afternoon.
Friday Night
Mostly clear, with a low around -5.
Saturday
Sunny, with a high near 21.
Saturday Night
Partly cloudy, with a low around 4.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
A slight chance of snow showers. Partly cloudy, with a low around 10.
Monday
A slight chance of snow showers. Partly sunny, with a high near 27.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Mammoth Hot Springs WY
 44.89°N 110.74°W (Elev. 7402 ft)
4:17 am MST Jan 20, 2026
4am MST Jan 20, 2026-6pm MST Jan 26, 2026
 
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