Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

JETTE (JETM8)

Lat: 47.76706°NLon: 114.23378°WElev: 3593.0ft.

NA

72°F

22°C

Humidity 54%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 27 Aug 10:43 AM MDT
Extended Forecast for

Big Arm MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms before noon.  Mostly cloudy, with a high near 85. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy smoke between 8pm and 9pm. Mostly cloudy, then gradually becoming clear, with a low around 57. West southwest wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 57 °F

    Patchy Smoke
    then Mostly
    Clear

  • Friday

    Friday: Mostly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. West southwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain before noon.  Mostly sunny, with a high near 73. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 73 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of rain.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

  • Sunday

    Sunday: A 40 percent chance of rain.  Partly sunny, with a high near 68. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before noon. Mostly cloudy, with a high near 85. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Patchy smoke between 8pm and 9pm. Mostly cloudy, then gradually becoming clear, with a low around 57. West southwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 56. West southwest wind 5 to 9 mph becoming calm in the evening.
Saturday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 73. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 51.
Sunday
A 40 percent chance of rain. Partly sunny, with a high near 68. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Big Arm MT
 47.8°N 114.28°W (Elev. 3061 ft)
7:41 am MDT Aug 27, 2026
11am MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database