Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. 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 W 0 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

12 Miles NE Big Sky MT

  • Today

    Today: Areas of smoke. Sunny, with a high near 66. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 66 °F

    Areas Smoke

  • Tonight

    Tonight: Patchy smoke. Mostly clear, with a low around 45. Northwest wind around 6 mph becoming calm  in the evening.

    Low: 45 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke. Sunny, with a high near 73. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 73 °F

    Patchy Smoke

  • Wednesday Night

    Wednesday Night: Patchy smoke before 7pm. Mostly clear, with a low around 50. West northwest wind around 5 mph becoming calm  in the evening.

    Low: 50 °F

    Patchy Smoke
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 79. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. West northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83. Light and variable wind becoming west 8 to 13 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. West wind 6 to 11 mph becoming light  after midnight. Winds could gust as high as 22 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Areas of smoke. Sunny, with a high near 66. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Tonight
Patchy smoke. Mostly clear, with a low around 45. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Patchy smoke. Sunny, with a high near 73. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Wednesday Night
Patchy smoke before 7pm. Mostly clear, with a low around 50. West northwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 79. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 55. West northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 83. Light and variable wind becoming west 8 to 13 mph in the afternoon. Winds could gust as high as 24 mph.
Friday Night
Mostly clear, with a low around 56. West wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 22 mph.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Big Sky MT
 45.36°N 111.12°W (Elev. 7451 ft)
4:36 am MDT Aug 4, 2026
8am MDT Aug 4, 2026-6pm MDT Aug 10, 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