Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

77°F

25°C

Humidity 27%
Wind Speed NNE 2 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Heat Index77°F (25°C)
Last update 16 Aug 02:15 PM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 79. Southwest wind 9 to 13 mph.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm.  Cloudy, then gradually becoming partly cloudy, with a low around 49. South southwest wind 8 to 13 mph becoming light southwest.  Chance of precipitation is 40%.

    Low: 49 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 77. Light and variable wind becoming west 8 to 13 mph in the afternoon.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 51. West wind 5 to 7 mph becoming light and variable  after midnight.  Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 9am.  Mostly cloudy, with a high near 74. Light and variable wind becoming west 5 to 7 mph in the afternoon.  Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 49. West wind around 5 mph becoming light and variable  in the evening.

    Low: 49 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Southwest wind 9 to 13 mph.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 49. South southwest wind 8 to 13 mph becoming light southwest. Chance of precipitation is 40%.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 77. Light and variable wind becoming west 8 to 13 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 50%.
Tuesday
A chance of showers, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 74. Light and variable wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 50%.
Tuesday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 49. West wind around 5 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
Sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 54.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
2:03 pm MDT Aug 16, 2026
3pm MDT Aug 16, 2026-6pm MDT Aug 22, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database