Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

52°F

11°C

Humidity 87%
Wind Speed SSE 10 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 27 Jul 04:55 AM MDT
Extended Forecast for

7 Miles NW Lewistown Municipal MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 82. Light and variable wind becoming east 5 to 9 mph in the morning.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 53. East northeast wind 5 to 8 mph becoming calm  after midnight.  Chance of precipitation is 50%.

    Low: 53 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 79. Calm wind becoming east southeast 5 to 7 mph in the morning.  Chance of precipitation is 60%.

    High: 79 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Mostly cloudy, with a low around 55. East wind 3 to 7 mph.  Chance of precipitation is 40%.

    Low: 55 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 78. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 54. East wind 5 to 9 mph.

    Low: 54 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 76. Light southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 23 mph.

    High: 76 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 55. East wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon.  Partly sunny, with a high near 79.

    High: 79 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 82. Light and variable wind becoming east 5 to 9 mph in the morning.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. East northeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 50%.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 79. Calm wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55. East wind 3 to 7 mph. Chance of precipitation is 40%.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78. Calm wind becoming east 5 to 7 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. East wind 5 to 9 mph.
Wednesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 76. Light southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 55. East wind 6 to 14 mph, with gusts as high as 23 mph.
Thursday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.
Thursday Night
A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 54.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles NW Lewistown Municipal MT
 47.12°N 109.56°W (Elev. 3707 ft)
2:13 am MDT Jul 27, 2025
5am MDT Jul 27, 2025-6pm MDT Aug 2, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database