Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East

A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Mostly Cloudy

0°F

-18°C

Humidity 83%
Wind Speed NE 3 mph
Barometer 30.13 in (1029.5 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Last update 22 Jan 7:53 pm MST
Extended Forecast for

3 Miles NNE Keystone SD

  • Tonight

    Tonight: Snow likely, mainly between 9pm and 11pm.  Mostly cloudy, with a low around -9. Northeast wind around 5 mph becoming calm  in the evening. Winds could gust as high as 15 mph.  Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

    Low: -9 °F

    Snow Likely

  • Friday

    Friday: Snow likely, mainly between 8am and 2pm.  Cloudy and cold, with a high near 0. Wind chill values as low as -17. Calm wind becoming southeast around 6 mph in the morning. Winds could gust as high as 17 mph.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 0 °F

    Snow Likely

  • Friday Night

    Friday Night: A 40 percent chance of snow before 11pm.  Cloudy during the early evening, then gradual clearing, with a low around -7. Calm wind.  New snow accumulation of less than a half inch possible.

    Low: -7 °F

    Chance Snow
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 17. Wind chill values as low as -5. Calm wind becoming northwest around 6 mph. Winds could gust as high as 16 mph.

    High: 17 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 11pm.  Partly cloudy, with a low around -3. Calm wind.

    Low: -3 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 11. Calm wind becoming north around 5 mph. Winds could gust as high as 16 mph.

    High: 11 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -2. Calm wind becoming west 5 to 8 mph in the evening. Winds could gust as high as 22 mph.

    Low: -2 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 38. Northwest wind 6 to 9 mph, with gusts as high as 26 mph.

    High: 38 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow likely, mainly between 9pm and 11pm. Mostly cloudy, with a low around -9. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Friday
Snow likely, mainly between 8am and 2pm. Cloudy and cold, with a high near 0. Wind chill values as low as -17. Calm wind becoming southeast around 6 mph in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Friday Night
A 40 percent chance of snow before 11pm. Cloudy during the early evening, then gradual clearing, with a low around -7. Calm wind. New snow accumulation of less than a half inch possible.
Saturday
Sunny, with a high near 17. Wind chill values as low as -5. Calm wind becoming northwest around 6 mph. Winds could gust as high as 16 mph.
Saturday Night
A 20 percent chance of snow after 11pm. Partly cloudy, with a low around -3. Calm wind.
Sunday
Mostly sunny, with a high near 11. Calm wind becoming north around 5 mph. Winds could gust as high as 16 mph.
Sunday Night
Mostly clear, with a low around -2. Calm wind becoming west 5 to 8 mph in the evening. Winds could gust as high as 22 mph.
Monday
Sunny, with a high near 38. Northwest wind 6 to 9 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 32.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 15.
Wednesday
A slight chance of snow. Partly sunny, with a high near 31.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 10.
Thursday
A slight chance of snow. Partly sunny, with a high near 25.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Keystone SD
 43.92°N 103.41°W (Elev. 4708 ft)
7:06 pm MST Jan 22, 2026
7pm MST Jan 22, 2026-6pm MST Jan 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