Severe Thunderstorms and Heavy Rain from the Plains to the Mid-Atlantic; Ongoing Heat in the South

Severe thunderstorms and showers pose a risk for excessive rain, localized flash flooding, strong gusts and/or large hail across portions of the northern and central Plains, the Lower Missouri to Lower Ohio Valleys, and across the Mid-Atlantic this afternoon and evening. Extreme heat is ongoing over the Desert Southwest and the Southeast U.S.. Read More >

Current conditions at

ROCKY BOY (RCBM8)

Lat: 48.25529°NLon: 109.78592°WElev: 3789.0ft.

NA

82°F

28°C

Humidity 24%
Wind Speed W 7 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Heat Index80°F (27°C)
Last update 09 Jul 03:18 PM MDT
Extended Forecast for

Big Sandy MT

Heat Advisory July 11, 12:00pm until July 13, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Mostly clear, with a low around 57. West wind 5 to 9 mph becoming light and variable.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. South southwest wind around 6 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after midnight.  Partly cloudy, with a low around 62. East southeast wind 5 to 7 mph becoming light and variable  after midnight.

    Low: 62 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Light and variable wind.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63. West wind around 6 mph becoming calm  after midnight.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 102. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 64. North wind 3 to 8 mph.

    Low: 64 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 94. Light and variable wind becoming east northeast around 5 mph in the afternoon.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms after midnight.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 57. West wind 5 to 9 mph becoming light and variable.
Friday
Sunny, with a high near 93. South southwest wind around 6 mph.
Friday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 62. East southeast wind 5 to 7 mph becoming light and variable after midnight.
Saturday
Sunny and hot, with a high near 99. Light and variable wind.
Saturday Night
Mostly clear, with a low around 63. West wind around 6 mph becoming calm after midnight.
Sunday
Mostly sunny and hot, with a high near 102. Calm wind becoming west 5 to 9 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 64. North wind 3 to 8 mph.
Monday
Mostly sunny, with a high near 94. Light and variable wind becoming east northeast around 5 mph in the afternoon.
Monday Night
A slight chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 92.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 91.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Thursday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Big Sandy MT
 48.18°N 110.11°W (Elev. 2759 ft)
12:31 pm MDT Jul 9, 2026
3pm MDT Jul 9, 2026-6pm MDT Jul 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database