Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Overcast

28°F

-2°C

Humidity 75%
Wind Speed NW 5 mph
Barometer 30.03 in (1018.6 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 29 Jan 2:53 am MST
Extended Forecast for

3 Miles NNE Keystone SD

  • Overnight

    Overnight: A 20 percent chance of snow.  Mostly cloudy, with a steady temperature around 28. Calm wind.

    Low: 28 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A 50 percent chance of snow.  Mostly cloudy, with a high near 37. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.  New snow accumulation of less than a half inch possible.

    High: 37 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow after 3am.  Mostly cloudy, with a low around 17. Light northwest wind.  New snow accumulation of less than a half inch possible.

    Low: 17 °F

    Chance Snow

  • Friday

    Friday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 24. Wind chill values as low as 16. Calm wind becoming southeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Likely

  • Friday Night

    Friday Night: Mostly cloudy, with a temperature rising to around 29 by 5am. Southwest wind 3 to 6 mph. Winds could gust as high as 16 mph.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of rain and snow before noon, then a chance of rain between noon and 3pm, then a chance of rain and snow after 3pm.  Partly sunny, with a high near 45. Northwest wind 6 to 10 mph, with gusts as high as 31 mph.  Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 45 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. Northwest wind around 9 mph, with gusts as high as 28 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 48. Northwest wind 5 to 8 mph becoming calm  in the afternoon. Winds could gust as high as 22 mph.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow. Mostly cloudy, with a steady temperature around 28. Calm wind.
Thursday
A 50 percent chance of snow. Mostly cloudy, with a high near 37. Northwest wind 5 to 10 mph, with gusts as high as 15 mph. New snow accumulation of less than a half inch possible.
Thursday Night
A 50 percent chance of snow after 3am. Mostly cloudy, with a low around 17. Light northwest wind. New snow accumulation of less than a half inch possible.
Friday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 24. Wind chill values as low as 16. Calm wind becoming southeast around 6 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a temperature rising to around 29 by 5am. Southwest wind 3 to 6 mph. Winds could gust as high as 16 mph.
Saturday
A chance of rain and snow before noon, then a chance of rain between noon and 3pm, then a chance of rain and snow after 3pm. Partly sunny, with a high near 45. Northwest wind 6 to 10 mph, with gusts as high as 31 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday Night
Mostly clear, with a low around 29. Northwest wind around 9 mph, with gusts as high as 28 mph.
Sunday
Mostly sunny, with a high near 48. Northwest wind 5 to 8 mph becoming calm in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 46.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
A slight chance of snow. Mostly sunny, with a high near 39.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Sunny, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Keystone SD
 43.92°N 103.41°W (Elev. 4708 ft)
1:57 am MST Jan 29, 2026
3am MST Jan 29, 2026-6pm MST Feb 4, 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