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

Heavy Rain Across the Southern US; Unsettled Pattern in the Pacific Northwest

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains Friday, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. High elevation snow and mixed precipitation and rain in the lower elevations will impact the Pacific Northwest this weekend before a stronger system moves in early next week. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

22°F

-6°C

Humidity 80%
Wind Speed W 5 mph
Barometer 30.08 in
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 13 Feb 4:55 am CST
Extended Forecast for

Fort Thompson SD

  • Today

    Today: Sunny, with a high near 60. Light south wind.

    High: 60 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 30. Light and variable wind.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 57. Calm wind becoming west northwest around 6 mph in the morning.

    High: 57 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. West northwest wind around 6 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 62. Light south wind increasing to 5 to 10 mph in the morning.

    High: 62 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. Southwest wind 5 to 7 mph becoming north after midnight.

    Low: 31 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 59. North northeast wind 5 to 9 mph becoming east southeast in the afternoon.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. East southeast wind 9 to 11 mph.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain after noon. Partly sunny, with a high near 59. East southeast wind 11 to 16 mph. Chance of precipitation is 20%.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 60. Light south wind.
Tonight
Partly cloudy, with a low around 30. Light and variable wind.
Saturday
Sunny, with a high near 57. Calm wind becoming west northwest around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 29. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 62. Light south wind increasing to 5 to 10 mph in the morning.
Sunday Night
Partly cloudy, with a low around 31. Southwest wind 5 to 7 mph becoming north after midnight.
Washington's Birthday
Sunny, with a high near 59. North northeast wind 5 to 9 mph becoming east southeast in the afternoon.
Monday Night
Partly cloudy, with a low around 39. East southeast wind 9 to 11 mph.
Tuesday
A slight chance of rain after noon. Partly sunny, with a high near 59. East southeast wind 11 to 16 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Wednesday
A slight chance of rain and snow. Mostly sunny, with a high near 45. Chance of precipitation is 20%.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 20%.
Thursday
A slight chance of snow. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.
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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:
4:56 am CST Feb 13, 2026
Forecast Valid:
5am CST Feb 13, 2026-6pm CST Feb 19, 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