Areas of Excessive Rainfall and Severe Thunderstorms; Fire Weather Concerns in the Northern Plains and Four Corners Region

Widespread showers and thunderstorms may bring areas of flash flooding across much of the Southern Plains into the Gulf Coast region and the upper Ohio River Valley into the Mid-Atlantic. A large Pacific storm will bring widespread rain, gusty winds, and mountain snow to California and the Great Basin. Fire weather concerns expected in the Northern Plains and the Four Corners region. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

65°F

18°C

Humidity 47%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 26 May 06:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 46. South southwest wind 5 to 8 mph becoming calm  after midnight.

    Low: 46 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 80. Calm wind becoming east southeast 5 to 8 mph in the afternoon.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. East southeast wind around 6 mph becoming calm  in the evening.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. Southeast wind 3 to 8 mph. Winds could gust as high as 20 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. Southeast wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 81. Light and variable wind becoming south 5 to 7 mph in the morning. Winds could gust as high as 20 mph.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 48. South southwest wind 3 to 6 mph.

    Low: 48 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Showers and possibly a thunderstorm.  High near 65. Chance of precipitation is 80%.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers.  Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely then
    Chance
    Showers

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46. South southwest wind 5 to 8 mph becoming calm after midnight.
Wednesday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Calm wind becoming east southeast 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 48. East southeast wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Southeast wind 3 to 8 mph. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 49. Southeast wind 3 to 8 mph. Winds could gust as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81. Light and variable wind becoming south 5 to 7 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 10 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. South southwest wind 3 to 6 mph.
Saturday
Showers and possibly a thunderstorm. High near 65. Chance of precipitation is 80%.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 65. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 41.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 70.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 42.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
6:02 pm MDT May 26, 2026
7pm MDT May 26, 2026-6pm MDT Jun 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database