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 Divide MT-200 MP 90.3 (MTLEW)

Lat: 47.07579°NLon: 109.26247°WElev: 4723.0ft.

NA

73°F

23°C

Humidity 45%
Wind Speed NE 1 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 26 Jul 05:45 PM MDT
Extended Forecast for

8 Miles NW Grass Range MT

Severe T-storm Watch until July 27, 01:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until July 27, 01:00am

    NOW until 1:00am Sun

    Severe T-storm Watch

  • Tonight

    Low: 57 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 5pm.  Sunny, with a high near 84. West southwest wind 7 to 9 mph becoming east northeast in the afternoon.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 57. East northeast wind 5 to 7 mph becoming light and variable  after midnight.

    Low: 57 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 76. Light and variable wind becoming east 5 to 10 mph in the morning.

    High: 76 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 56. East wind 5 to 9 mph becoming light south southeast  after midnight.

    Low: 56 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 78. Calm wind becoming east 5 to 8 mph in the afternoon.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 56. East wind 3 to 8 mph.

    Low: 56 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after noon.  Partly sunny, with a high near 76. Light east southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 21 mph.

    High: 76 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 57. East northeast wind 6 to 10 mph becoming west southwest after midnight.
Sunday
A 20 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 84. West southwest wind 7 to 9 mph becoming east northeast in the afternoon.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57. East northeast wind 5 to 7 mph becoming light and variable after midnight.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 76. Light and variable wind becoming east 5 to 10 mph in the morning.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 56. East wind 5 to 9 mph becoming light south southeast after midnight.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Calm wind becoming east 5 to 8 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56. East wind 3 to 8 mph.
Wednesday
A chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 76. Light east southeast wind becoming east 9 to 14 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 57.
Thursday
A chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 80.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NW Grass Range MT
 47.1°N 108.94°W (Elev. 3698 ft)
2:11 pm MDT Jul 26, 2025
6pm MDT Jul 26, 2025-6pm MDT Aug 2, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database