Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Boulder Hill I-15 MP 170.9 (MTBOU)

Lat: 46.3233°NLon: 112.06891°WElev: 5593.0ft.

NA

58°F

14°C

Humidity 36%
Wind Speed WSW 1 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 19 Aug 01:45 AM MDT
Extended Forecast for

3 Miles NE Boulder MT

  • Overnight

    Overnight: Partly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83. West wind 3 to 8 mph.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Northwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Light and variable wind becoming northwest 5 to 7 mph in the morning.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. North wind around 5 mph becoming calm  in the evening.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after midnight.  Mostly cloudy, with a low around 59. East northeast wind 5 to 7 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 83. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 83 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 53. Calm wind.
Wednesday
Sunny, with a high near 83. West wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 54. Northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 89. Light and variable wind becoming northwest 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 58. North wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 88. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Friday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 59. East northeast wind 5 to 7 mph becoming calm in the evening.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 83. Calm wind becoming south southwest 5 to 8 mph in the morning.
Saturday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Sunny, with a high near 82.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Boulder MT
 46.28°N 112.08°W (Elev. 4993 ft)
12:31 am MDT Aug 19, 2026
2am MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database