Late January Extreme Cold; Watching for Another East Coast Storm Threat This Weekend

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

26°F

-3°C

Humidity 55%
Wind Speed Calm
Barometer 30.17 in (1025.3 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 27 Jan 6:53 pm MST
Extended Forecast for

3 Miles NNE Keystone SD

  • Tonight

    Tonight: Mostly clear, with a low around 23. West wind 3 to 6 mph. Winds could gust as high as 15 mph.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 42. Light and variable wind.

    High: 42 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after 11pm.  Cloudy, with a low around 22. Light and variable wind.

    Low: 22 °F

    Chance Snow

  • Thursday

    Thursday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 37. Wind chill values as low as 19. Northwest wind 5 to 10 mph, with gusts as high as 16 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 16. Calm wind.  New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Chance Snow

  • Friday

    Friday: A 50 percent chance of snow.  Mostly cloudy, with a high near 25. Calm wind becoming east around 6 mph. Winds could gust as high as 16 mph.  New snow accumulation of less than a half inch possible.

    High: 25 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow after 11pm.  Mostly cloudy, with a low around 15. Calm wind becoming southwest around 6 mph in the evening. Winds could gust as high as 17 mph.

    Low: 15 °F

    Slight Chance
    Snow

  • Saturday

    Saturday: A chance of snow before 10am, then a chance of rain and snow.  Partly sunny, with a high near 42. West wind 7 to 10 mph, with gusts as high as 29 mph.

    High: 42 °F

    Chance
    Rain/Snow

  • Saturday Night

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

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 23. West wind 3 to 6 mph. Winds could gust as high as 15 mph.
Wednesday
Partly sunny, with a high near 42. Light and variable wind.
Wednesday Night
A 30 percent chance of snow after 11pm. Cloudy, with a low around 22. Light and variable wind.
Thursday
Snow likely, mainly after 11am. Mostly cloudy, with a high near 37. Wind chill values as low as 19. Northwest wind 5 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 16. Calm wind. New snow accumulation of less than a half inch possible.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 25. Calm wind becoming east around 6 mph. Winds could gust as high as 16 mph. New snow accumulation of less than a half inch possible.
Friday Night
A 20 percent chance of snow after 11pm. Mostly cloudy, with a low around 15. Calm wind becoming southwest around 6 mph in the evening. Winds could gust as high as 17 mph.
Saturday
A chance of snow before 10am, then a chance of rain and snow. Partly sunny, with a high near 42. West wind 7 to 10 mph, with gusts as high as 29 mph.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
A slight chance of snow. Partly sunny, with a high near 43.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Keystone SD
 43.92°N 103.41°W (Elev. 4708 ft)
6:27 pm MST Jan 27, 2026
7pm MST Jan 27, 2026-6pm MST Feb 3, 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