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

Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

64°F

18°C

Humidity 46%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 29 Aug 08:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. West northwest wind around 6 mph becoming calm after midnight.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 75. Light and variable wind becoming north northwest 8 to 13 mph in the afternoon.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. North northwest wind 6 to 11 mph becoming light and variable after midnight.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. North northwest wind around 6 mph becoming light and variable after midnight.

    Low: 49 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the afternoon.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. North wind around 6 mph becoming east after midnight.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. West northwest wind around 6 mph becoming calm after midnight.
Saturday
Sunny, with a high near 75. Light and variable wind becoming north northwest 8 to 13 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 47. North northwest wind 6 to 11 mph becoming light and variable after midnight.
Sunday
Sunny, with a high near 81. Calm wind becoming west northwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. North northwest wind around 6 mph becoming light and variable after midnight.
Labor Day
Sunny, with a high near 83. Calm wind becoming north 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 50. North wind around 6 mph becoming east after midnight.
Tuesday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
9:28 pm MDT Aug 29, 2025
Forecast Valid:
9pm MDT Aug 29, 2025-6pm MDT Sep 5, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation