Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

63°F

17°C

Humidity 35%
Wind Speed SSE 4 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 11 Aug 09:15 AM MDT
Extended Forecast for

18 Miles SE Big Sky MT

Red Flag Warning August 11, 12:00pm until August 11, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  • Today

    Today: Widespread smoke, mainly before noon. Sunny, with a high near 79. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 79 °F

    Smoke

  • Tonight

    Tonight: Widespread smoke, mainly between 8pm and 4am. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 52. West wind 6 to 11 mph becoming light and variable  in the evening. Winds could gust as high as 22 mph.

    Low: 52 °F

    Smoke

  • Wednesday

    Wednesday: Increasing clouds, with a high near 75. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 75 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 51. North northwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 68. Calm wind becoming south southwest around 6 mph in the afternoon.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm.  Low around 49. South wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 80%.

    Low: 49 °F

    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm.  High near 63. Calm wind becoming southwest around 6 mph in the afternoon.  Chance of precipitation is 90%.

    High: 63 °F

    Showers
    Likely then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers.  Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Widespread smoke, mainly before noon. Sunny, with a high near 79. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 28 mph.
Tonight
Widespread smoke, mainly between 8pm and 4am. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 52. West wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 22 mph.
Wednesday
Increasing clouds, with a high near 75. Calm wind becoming west 5 to 8 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 51. North northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm. Low around 49. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm. High near 63. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 90%.
Friday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 47. Chance of precipitation is 80%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 65. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 69.
Sunday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
18 Miles SE Big Sky MT
 45.06°N 111.1°W (Elev. 7421 ft)
8:48 am MDT Aug 11, 2026
9am MDT Aug 11, 2026-6pm MDT Aug 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

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