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

23°F

-5°C

Humidity 62%
Wind Speed SSE 2 MPH
Barometer NA
Dewpoint 11°F (-12°C)
Visibility NA
Last update 20 Jan 12:15 AM MST
Extended Forecast for

5 Miles SSW Mammoth Hot Springs WY

  • Overnight

    Overnight: Partly cloudy, with a low around 11. Wind chill values as low as -5. Breezy, with a south wind 11 to 16 mph, with gusts as high as 24 mph.

    Low: 11 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: A slight chance of snow showers between 11am and noon.  Mostly cloudy, then becoming sunny during the afternoon, with a high near 23. Wind chill values as low as -5. South wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    High: 23 °F

    Slight Chance
    Snow Showers
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: 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. 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.

    High: 21 °F

    Mostly Sunny

  • Friday Night

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

    Low: -5 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 11. Wind chill values as low as -5. Breezy, with a south wind 11 to 16 mph, with gusts as high as 24 mph.
Tuesday
A slight chance of snow showers between 11am and noon. Mostly cloudy, then becoming sunny during the afternoon, with a high near 23. Wind chill values as low as -5. South wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
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. 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.
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.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Mammoth Hot Springs WY
 44.89°N 110.74°W (Elev. 7402 ft)
11:47 pm MST Jan 19, 2026
12am MST Jan 20, 2026-6pm MST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database