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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

N/A

Humidity 59%
Wind Speed N 0 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 30 Jul 04:50 AM MDT
Extended Forecast for

6 Miles NNE Moore MT

Severe T-storm Watch until August 27, 10:00pm
Click here for hazard details and duration
...
  •  
    Severe T-storm Watch until August 27, 10:00pm

    NOW until 10:00pm Thu

    Severe T-storm Watch

  • Tonight

    Low: 56 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Patchy smoke between 11am and 1pm. Increasing clouds, with a high near 84. Light and variable wind becoming south southwest 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 84 °F

    Patchy Smoke
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 54. South wind 5 to 13 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. Light and variable wind becoming west northwest around 5 mph in the afternoon.

    High: 77 °F

    Cloudy then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then a chance of showers and thunderstorms after noon. High near 70. Light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 42. West wind 7 to 17 mph, with gusts as high as 26 mph.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76. Southwest wind 7 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 76 °F

    Sunny

Detailed Forecast

Tonight
A 30 percent chance of showers before 9pm. Mostly cloudy, with a low around 56. South southeast wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Friday
A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Patchy smoke between 11am and 1pm. Increasing clouds, with a high near 84. Light and variable wind becoming south southwest 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Friday Night
A 30 percent chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 54. South wind 5 to 13 mph, with gusts as high as 21 mph.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77. Light and variable wind becoming west northwest around 5 mph in the afternoon.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then a chance of showers and thunderstorms after noon. High near 70. Light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 42. West wind 7 to 17 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 76. Southwest wind 7 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 82.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 48.
Thursday
A slight chance of showers. Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNE Moore MT
 47.05°N 109.64°W (Elev. 3930 ft)
Last Update:
4:57 pm MDT Aug 27, 2026
Forecast Valid:
6pm MDT Aug 27, 2026-6pm MDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation