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

Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

Severe thunderstorms with heavy rainfall will be possible across the southern Appalachians through this evening. Thunderstorms are also expected from the northern/central Plains into portions of the Midwest through Tuesday, and severe storms may produce large hail and damaging wind gusts. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Sidney-Richland (KSDY)

Lat: 47.7°NLon: 104.2°WElev: 1985.0ft.

Clear

77°F

25°C

Humidity 36%
Wind Speed N 8 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Aug 06:20 PM MDT
Extended Forecast for

Lambert MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 49. North wind 5 to 8 mph becoming calm in the evening.

    Low: 49 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 53. North northeast wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 86 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. West northwest wind 5 to 10 mph becoming light west southwest in the evening. Winds could gust as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. North wind 5 to 10 mph becoming light north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. Calm wind becoming north northeast 5 to 8 mph in the morning.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 53. North northeast wind 6 to 8 mph becoming east southeast after midnight.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 49. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 79. Calm wind becoming north northwest around 6 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 53. North northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 56. West northwest wind 5 to 10 mph becoming light west southwest in the evening. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 86. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 54. North wind 5 to 10 mph becoming light north northeast after midnight. Winds could gust as high as 18 mph.
Friday
Sunny, with a high near 82. Calm wind becoming north northeast 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 53. North northeast wind 6 to 8 mph becoming east southeast after midnight.
Saturday
Mostly sunny, with a high near 83. Southeast wind 6 to 16 mph, with gusts as high as 26 mph.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 59. East southeast wind 14 to 17 mph, with gusts as high as 26 mph.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 58.
Monday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lambert MT
 47.69°N 104.62°W (Elev. 2451 ft)
Last Update:
3:41 pm MDT Aug 17, 2026
Forecast Valid:
6pm MDT Aug 17, 2026-6pm MDT Aug 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation