Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

Lat: 45.34534°NLon: 111.17261°WElev: 5699.0ft.

NA

N/A

Humidity NA
Wind Speed SW 0 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

12 Miles ENE Big Sky MT

  • Tonight

    Tonight: Patchy smoke. Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke. Sunny, with a high near 72. Calm wind becoming west northwest 5 to 9 mph in the afternoon.

    High: 72 °F

    Patchy Smoke

  • Wednesday Night

    Wednesday Night: Patchy smoke. Mostly clear, with a low around 50. West northwest wind around 6 mph becoming calm.

    Low: 50 °F

    Patchy Smoke

  • Thursday

    Thursday: Sunny, with a high near 79. West wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. West northwest wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 20 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. West wind 8 to 13 mph becoming light  after midnight. Winds could gust as high as 23 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. Light south southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.

    High: 81 °F

    Sunny

  • Saturday Night

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

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy smoke. Mostly clear, with a low around 45. Calm wind.
Wednesday
Patchy smoke. Sunny, with a high near 72. Calm wind becoming west northwest 5 to 9 mph in the afternoon.
Wednesday Night
Patchy smoke. Mostly clear, with a low around 50. West northwest wind around 6 mph becoming calm.
Thursday
Sunny, with a high near 79. West wind 5 to 10 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 54. West northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 81. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.
Friday Night
Mostly clear, with a low around 56. West wind 8 to 13 mph becoming light after midnight. Winds could gust as high as 23 mph.
Saturday
Sunny, with a high near 81. Light south southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles ENE Big Sky MT
 45.34°N 111.12°W (Elev. 7717 ft)
10:16 pm MDT Aug 4, 2026
11pm MDT Aug 4, 2026-6pm MDT Aug 11, 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