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

Major Winter Storm to Impact the Mid-Atlantic and Northeast; Inclement Weather in the Pacific Northwest

A major winter storm is expected to bring heavy snow, strong winds, and coastal flooding across the Mid-Atlantic and Northeast that may cause impossible travel conditions and power outages. Blizzard conditions are possible along the Northeastern Seaboard. Wet weather and strong winds return to the Pacific Northwest and north-central California. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

41°F

5°C

Humidity 35%
Wind Speed S 16 mph
Barometer 30.09 in
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 23 Feb 3:35 pm CST
Extended Forecast for

Fort Thompson SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 43. South wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 43 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. South southeast wind 6 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 34 mph.

    High: 47 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 18. North northwest wind 5 to 10 mph becoming east after midnight.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow. Mostly cloudy, with a high near 37. East southeast wind 6 to 11 mph. Chance of precipitation is 50%.

    High: 37 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21. East wind around 9 mph becoming west after midnight.

    Low: 21 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 53. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 53 °F

    Sunny then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. South southwest wind around 9 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 58. West wind 9 to 18 mph becoming north in the afternoon.

    High: 58 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 43. South wind 13 to 17 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 27. South southeast wind 6 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph.
Tuesday
Mostly cloudy, with a high near 47. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 34 mph.
Tuesday Night
Mostly cloudy, with a low around 18. North northwest wind 5 to 10 mph becoming east after midnight.
Wednesday
A chance of snow. Mostly cloudy, with a high near 37. East southeast wind 6 to 11 mph. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around 21. East wind around 9 mph becoming west after midnight.
Thursday
Sunny, with a high near 53. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Thursday Night
Mostly clear, with a low around 31. South southwest wind around 9 mph.
Friday
Mostly sunny, with a high near 58. West wind 9 to 18 mph becoming north in the afternoon.
Friday Night
A chance of snow after midnight. Mostly cloudy, with a low around 15. Chance of precipitation is 30%.
Saturday
A slight chance of snow. Partly sunny, with a high near 27. Chance of precipitation is 20%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 8. Chance of precipitation is 30%.
Sunday
A chance of snow. Partly sunny, with a high near 27. Chance of precipitation is 30%.
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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:
3:36 pm CST Feb 23, 2026
Forecast Valid:
3pm CST Feb 23, 2026-6pm CST Mar 1, 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