National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Continues Across the Southern Plains and Gulf Coast; Heavy Rainfall from the Tennessee Valley to Southeast on Friday

Hazardous heat will continue across the Southern Plains, Gulf Coast and Desert Southwest through the weekend. Additional heat will build into the Great Basin and Northern Plains this weekend. A stalled front is expected to bring periods of heavy to excessive rainfall and flooding from the Tennessee Valley to the Southeast U.S on Friday. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

76°F

24°C

Humidity 51%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 56°F (13°C)
Visibility NA
Heat Index78°F (26°C)
Last update 23 Jul 09:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Patchy smoke. Mostly clear, with a low around 58. South wind around 6 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy smoke. Sunny, with a high near 87. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 87 °F

    Patchy Smoke
    then Chance
    Showers

  • Friday Night

    Friday Night: Isolated showers and thunderstorms before 8pm. Patchy smoke before 7pm. Partly cloudy, with a low around 58. West southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90. South southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. Southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 23 mph.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 91. South southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 91 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. South wind 6 to 8 mph.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Patchy smoke. Mostly clear, with a low around 58. South wind around 6 mph. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy smoke. Sunny, with a high near 87. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph.
Friday Night
Isolated showers and thunderstorms before 8pm. Patchy smoke before 7pm. Partly cloudy, with a low around 58. West southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90. South southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. Southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 23 mph.
Sunday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 91. South southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 59. South wind 6 to 8 mph.
Monday
A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Sunny, with a high near 90.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 90.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
8:48 pm MDT Jul 23, 2026
Forecast Valid:
10pm MDT Jul 23, 2026-6pm MDT Jul 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation