Moke Impacts Hawaii; Severe Thunderstorms and Heavy Rainfall from the Great Basin to the Plains

Heavy rain from Tropical Storm Moke will begin to impact the Big Island today, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Repeated storms and heavy rainfall may cause flash flooding from the Plains into the Lower MS Valley. Dangerous heat persists across the South. Read More >

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

Lewistown Municipal MT

Severe T-storm Watch until August 23, 07:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until August 23, 07:00pm

    NOW until 7:00pm Sun

    Severe T-storm Watch

  • This Afternoon

    High: 89 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Some of the storms could be severe.  Mostly clear, with a low around 52. West northwest wind 5 to 7 mph becoming south southwest in the evening.

    Low: 52 °F

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 79. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48. North northwest wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. Northeast wind 6 to 9 mph becoming southeast after midnight.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Southeast wind 3 to 6 mph.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55. Southeast wind 6 to 9 mph.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms, mainly after 3pm. Some of the storms could be severe. Partly sunny, with a high near 89. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Some of the storms could be severe. Mostly clear, with a low around 52. West northwest wind 5 to 7 mph becoming south southwest in the evening.
Monday
Sunny, with a high near 79. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 48. North northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 51. Northeast wind 6 to 9 mph becoming southeast after midnight.
Wednesday
Mostly sunny, with a high near 87. Southeast wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 55. Southeast wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
A chance of showers before midnight. Partly cloudy, with a low around 55.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 53.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
12:31 pm MDT Aug 23, 2026
2pm MDT Aug 23, 2026-6pm MDT Aug 29, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database