Heavy Snow from the Midwest into the Great Lakes; Locally Heavy Rain in the Western Gulf Coast

A significant winter storm will produce a broad area of moderate to heavy snow from the Midwest through the western Great Lakes. Significant snow accumulations of 6-12 inches, and locally more than 1 foot, and gusty wind may cause hazardous travel conditions. Thunderstorms, some severe, and showers may produce locally heavy rain and isolated flash flooding along the western Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

-6°F

-21°C

Humidity 78%
Wind Speed W 3 mph
Barometer 30.12 in (1030.0 mb)
Dewpoint -11°F (-24°C)
Visibility 10.00 mi
Last update 30 Nov 2:53 am MST
Extended Forecast for

4 Miles NW Keystone SD

  • Overnight

    Overnight: Mostly clear, with a low around -3. Wind chill values as low as -11. Light southwest wind.

    Low: -3 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 22. Wind chill values as low as -11. South wind 3 to 7 mph. Winds could gust as high as 17 mph.

    High: 22 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values as low as -4. South wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 16 mph.

    Low: 8 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values as low as -2. Northwest wind 6 to 8 mph, with gusts as high as 24 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a temperature rising to around 26 by 4am. West wind around 8 mph, with gusts as high as 17 mph.

    Low: 20 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after 11am.  Mostly cloudy, with a high near 36. West wind 5 to 7 mph, with gusts as high as 17 mph.

    High: 36 °F

    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 15. Northwest wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 15 °F

    Chance Snow

  • Wednesday

    Wednesday: A chance of snow, mainly before 11am.  Partly sunny, with a high near 21. North wind 5 to 8 mph becoming calm  in the afternoon. Winds could gust as high as 18 mph.

    High: 21 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around -3. Wind chill values as low as -11. Light southwest wind.
Sunday
Partly sunny, with a high near 22. Wind chill values as low as -11. South wind 3 to 7 mph. Winds could gust as high as 17 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values as low as -4. South wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 16 mph.
Monday
Sunny, with a high near 29. Wind chill values as low as -2. Northwest wind 6 to 8 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a temperature rising to around 26 by 4am. West wind around 8 mph, with gusts as high as 17 mph.
Tuesday
A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 36. West wind 5 to 7 mph, with gusts as high as 17 mph.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 15. Northwest wind 5 to 9 mph, with gusts as high as 20 mph.
Wednesday
A chance of snow, mainly before 11am. Partly sunny, with a high near 21. North wind 5 to 8 mph becoming calm in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 8.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 22.
Friday
A slight chance of snow. Partly sunny, with a high near 35.
Friday Night
A chance of snow. Mostly cloudy, with a low around 24.
Saturday
A chance of snow. Mostly cloudy, with a high near 35.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Keystone SD
 43.94°N 103.47°W (Elev. 5482 ft)
1:32 am MST Nov 30, 2025
3am MST Nov 30, 2025-6pm MST Dec 6, 2025
 
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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