Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

43°F

6°C

Humidity 71%
Wind Speed SSW 9 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 10 Dec 05:15 PM MST
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. South wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers, mainly after 3pm.  Snow level 6600 feet rising to 7400 feet in the afternoon. Mostly cloudy, with a high near 43. South wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 43 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely.  Mostly cloudy, with a low around 37. Southwest wind around 10 mph, with gusts as high as 22 mph.  Chance of precipitation is 60%.

    Low: 37 °F

    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers, mainly before 11am.  Mostly cloudy, with a high near 45. Southwest wind around 10 mph, with gusts as high as 23 mph.

    High: 45 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. Southwest wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 44. South southwest wind 6 to 8 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. South southeast wind 8 to 10 mph.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. South wind 11 to 14 mph, with gusts as high as 23 mph.
Thursday
A 50 percent chance of showers, mainly after 3pm. Snow level 6600 feet rising to 7400 feet in the afternoon. Mostly cloudy, with a high near 43. South wind 11 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Showers likely. Mostly cloudy, with a low around 37. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 45. Southwest wind around 10 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 32. Southwest wind 9 to 11 mph, with gusts as high as 23 mph.
Saturday
Mostly sunny, with a high near 44. South southwest wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 25. South southeast wind 8 to 10 mph.
Sunday
Sunny, with a high near 47.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 45.
Monday Night
A slight chance of rain and snow showers. Snow level 6000 feet. Mostly cloudy, with a low around 32.
Tuesday
A chance of rain and snow showers. Snow level 5900 feet rising to 6600 feet in the afternoon. Partly sunny, with a high near 44.
Tuesday Night
A chance of rain and snow showers. Snow level 6400 feet lowering to 5800 feet after midnight . Mostly cloudy, with a low around 33.
Wednesday
A chance of snow showers. Partly sunny, with a high near 42. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
5:18 pm MST Dec 10, 2025
5pm MST Dec 10, 2025-6pm MST Dec 17, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database