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

47°F

8°C

Humidity 88%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 21 Jun 03:15 AM MDT
Extended Forecast for

Mammoth WY

  • Overnight

    Overnight: Scattered showers.  Mostly cloudy, with a steady temperature around 45. Southeast wind 9 to 14 mph, with gusts as high as 25 mph.  Chance of precipitation is 50%.

    Low: 45 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers, mainly before 8am.  Mostly sunny, with a high near 65. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 33 mph.  Chance of precipitation is 40%.

    High: 65 °F

    Breezy.
    Scattered
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am.  Cloudy, with a low around 34. Breezy, with a southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 28 mph.  Chance of precipitation is 70%.

    Low: 34 °F

    Scattered
    Showers and
    Breezy then
    Showers
    Likely

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon.  High near 55. Breezy, with a northwest wind 7 to 15 mph becoming southwest in the morning. Winds could gust as high as 26 mph.  Chance of precipitation is 80%.

    High: 55 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms before 10pm, then isolated showers between 10pm and 11pm.  Mostly cloudy, with a low around 33. West southwest wind 5 to 11 mph becoming south southeast after midnight. Winds could gust as high as 23 mph.  Chance of precipitation is 50%.

    Low: 33 °F

    Scattered
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 66. South southeast wind 6 to 9 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. West southwest wind 5 to 9 mph becoming calm  after midnight.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Isolated showers and thunderstorms after noon.  Mostly sunny, with a high near 73. Chance of precipitation is 20%.

    High: 73 °F

    Sunny then
    Isolated
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Overnight
Scattered showers. Mostly cloudy, with a steady temperature around 45. Southeast wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Saturday
Scattered showers, mainly before 8am. Mostly sunny, with a high near 65. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.
Saturday Night
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Cloudy, with a low around 34. Breezy, with a southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%.
Sunday
Showers, with thunderstorms also possible after noon. High near 55. Breezy, with a northwest wind 7 to 15 mph becoming southwest in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
Scattered showers and thunderstorms before 10pm, then isolated showers between 10pm and 11pm. Mostly cloudy, with a low around 33. West southwest wind 5 to 11 mph becoming south southeast after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 50%.
Monday
Sunny, with a high near 66. South southeast wind 6 to 9 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 39. West southwest wind 5 to 9 mph becoming calm after midnight.
Tuesday
Isolated showers and thunderstorms after noon. Mostly sunny, with a high near 73. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Scattered showers and thunderstorms. Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
3:43 am MDT Jun 21, 2025
4am MDT Jun 21, 2025-6pm MDT Jun 27, 2025
 
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Additional Resources

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Hourly Weather Forecast

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