Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NP (YLAW4)

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

NA

54°F

12°C

Humidity 68%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 20 Jun 06:15 AM MDT
Extended Forecast for

Mammoth WY

  • Today

    Today: A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms after 5pm.  Mostly sunny, with a high near 78. Breezy, with a northwest wind 7 to 12 mph becoming south southwest 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.  Chance of precipitation is 50%.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Increasing clouds, with a low around 43. Breezy, with a southwest wind 6 to 16 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.  Chance of precipitation is 50%.

    Low: 43 °F

    Chance
    T-storms and
    Breezy then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 66. Breezy, with a southwest wind 10 to 18 mph, with gusts as high as 26 mph.  Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Showers likely, mainly after midnight.  Mostly cloudy, with a low around 40. West southwest wind 6 to 14 mph, with gusts as high as 26 mph.  Chance of precipitation is 70%.

    Low: 40 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after noon.  High near 56. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 80%.

    High: 56 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 34. West wind 5 to 10 mph becoming south after midnight.  Chance of precipitation is 30%.

    Low: 34 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 67. South southeast wind 5 to 9 mph becoming west southwest in the afternoon.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 73.

    High: 73 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 78. Breezy, with a northwest wind 7 to 12 mph becoming south southwest 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 50%.
Tonight
A chance of showers and thunderstorms. Increasing clouds, with a low around 43. Breezy, with a southwest wind 6 to 16 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 66. Breezy, with a southwest wind 10 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 40. West southwest wind 6 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Sunday
Showers likely, then showers and possibly a thunderstorm after noon. High near 56. Southwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 34. West wind 5 to 10 mph becoming south after midnight. Chance of precipitation is 30%.
Monday
Sunny, with a high near 67. South southeast wind 5 to 9 mph becoming west southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
A chance of showers and thunderstorms. Sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
6:45 am MDT Jun 20, 2025
7am MDT Jun 20, 2025-6pm MDT Jun 26, 2025
 
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Additional Resources

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