National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rainfall Today from the Central Plains into the Tennessee Valley

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into portions of the Southeast today. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys today. Read More >

Hazardous Weather Conditions

Current conditions at

Comertown Turn-Off MT-5 MP 13.4 (MTCOM)

Lat: 48.81°NLon: 104.2529°WElev: 2359.0ft.

NA

68°F

20°C

Humidity 71%
Wind Speed WNW 11 MPH
Barometer NA
Dewpoint 58°F (14°C)
Visibility NA
Last update 12 Jul 04:45 AM MDT
Extended Forecast for

Westby MT

Extreme Heat Warning July 12, 05:04am until July 13, 06:00am
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 12, 05:04am until July 13, 06:00am

    NOW until 6:00am Mon

    Extreme Heat Warning

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 69. South wind 16 to 21 mph becoming north northwest 10 to 15 mph after midnight. Winds could gust as high as 33 mph.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89. North wind 14 to 16 mph, with gusts as high as 24 mph.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. East northeast wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Breezy, with an east northeast wind 15 to 22 mph, with gusts as high as 32 mph.

    High: 84 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. Breezy, with an east northeast wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 70%.

    Low: 61 °F

    Chance
    Showers and
    Breezy then
    Showers
    Likely

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 80. Breezy, with an east wind 20 to 24 mph, with gusts as high as 34 mph.

    High: 80 °F

    Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Breezy, with an east northeast wind 13 to 22 mph, with gusts as high as 33 mph.

    Low: 59 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 104. North northwest wind 5 to 10 mph becoming south southeast 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.
Tonight
Partly cloudy, with a low around 69. South wind 16 to 21 mph becoming north northwest 10 to 15 mph after midnight. Winds could gust as high as 33 mph.
Monday
Mostly sunny, with a high near 89. North wind 14 to 16 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 62. East northeast wind 13 to 15 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 84. Breezy, with an east northeast wind 15 to 22 mph, with gusts as high as 32 mph.
Tuesday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. Breezy, with an east northeast wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 80. Breezy, with an east wind 20 to 24 mph, with gusts as high as 34 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Breezy, with an east northeast wind 13 to 22 mph, with gusts as high as 33 mph.
Thursday
Partly sunny, with a high near 84. East northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 60. East northeast wind 8 to 13 mph, with gusts as high as 18 mph.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. East wind 9 to 17 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 85. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.89°N 104.06°W (Elev. 1949 ft)
Last Update:
3:41 am MDT Jul 12, 2026
Forecast Valid:
5am MDT Jul 12, 2026-6pm MDT Jul 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation