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

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

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Overcast

19°F

-7°C

Humidity 51%
Wind Speed Calm
Barometer 30.35 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Last update 27 Jan 9:15 pm CST
Extended Forecast for

Fort Thompson SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 7. Northwest wind around 5 mph becoming calm after midnight.

    Low: 7 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 24. Calm wind becoming east around 6 mph in the afternoon.

    High: 24 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of snow after midnight. Cloudy, with a low around 8. East wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 8 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow. Cloudy, with a high near 18. East wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 18 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around -5. Northeast wind around 7 mph. Chance of precipitation is 20%.

    Low: -5 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: Mostly sunny and cold, with a high near 9. Northeast wind around 7 mph.

    High: 9 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -4. East wind 7 to 11 mph becoming south southeast after midnight.

    Low: -4 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of snow, mainly after noon. Partly sunny, with a high near 27. South southeast wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 27 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of freezing rain before midnight, then a chance of snow. Mostly cloudy, with a low around 16. South southeast wind around 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 16 °F

    Chance
    Freezing Rain
    then Chance
    Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 7. Northwest wind around 5 mph becoming calm after midnight.
Wednesday
Partly sunny, with a high near 24. Calm wind becoming east around 6 mph in the afternoon.
Wednesday Night
A chance of snow after midnight. Cloudy, with a low around 8. East wind 5 to 7 mph. Chance of precipitation is 30%.
Thursday
A chance of snow. Cloudy, with a high near 18. East wind 5 to 7 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around -5. Northeast wind around 7 mph. Chance of precipitation is 20%.
Friday
Mostly sunny and cold, with a high near 9. Northeast wind around 7 mph.
Friday Night
Partly cloudy, with a low around -4. East wind 7 to 11 mph becoming south southeast after midnight.
Saturday
A chance of snow, mainly after noon. Partly sunny, with a high near 27. South southeast wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Saturday Night
A chance of freezing rain before midnight, then a chance of snow. Mostly cloudy, with a low around 16. South southeast wind around 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Sunday
Mostly cloudy, with a high near 36.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Thompson SD
 44.05°N 99.4°W (Elev. 1447 ft)
Last Update:
9:26 pm CST Jan 27, 2026
Forecast Valid:
9pm CST Jan 27, 2026-6pm CST Feb 3, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation