Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

6°F

-14°C

Humidity 73%
Wind Speed Calm
Barometer 30.30 in (1030.7 mb)
Dewpoint -1°F (-18°C)
Visibility 10.00 mi
Last update 29 Jan 11:53 am CST
Extended Forecast for

4 Miles ESE Castlewood SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 12. North wind 3 to 5 mph.

    High: 12 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around -9. Wind chill values as low as -23. North northeast wind 5 to 8 mph.

    Low: -9 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near 3. Wind chill values as low as -24. North northeast wind 5 to 10 mph.

    High: 3 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -12. Wind chill values as low as -22. Calm wind becoming south southwest around 6 mph after midnight.

    Low: -12 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of snow after noon.  Mostly sunny, with a high near 17. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.  Chance of precipitation is 20%.

    High: 17 °F

    Sunny then
    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Snow.  Low around 12. South wind 14 to 18 mph becoming west after midnight. Winds could gust as high as 31 mph.  Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 12 °F

    Snow

  • Sunday

    Sunday: A chance of snow before noon.  Patchy blowing snow between noon and 4pm. Mostly cloudy, with a high near 32. Northwest wind 14 to 17 mph, with gusts as high as 28 mph.  Chance of precipitation is 30%.

    High: 32 °F

    Chance Snow
    then Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 8 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 22. North wind around 7 mph becoming east in the afternoon.

    High: 22 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 12. North wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around -9. Wind chill values as low as -23. North northeast wind 5 to 8 mph.
Friday
Sunny and cold, with a high near 3. Wind chill values as low as -24. North northeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around -12. Wind chill values as low as -22. Calm wind becoming south southwest around 6 mph after midnight.
Saturday
A slight chance of snow after noon. Mostly sunny, with a high near 17. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 20%.
Saturday Night
Snow. Low around 12. South wind 14 to 18 mph becoming west after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Sunday
A chance of snow before noon. Patchy blowing snow between noon and 4pm. Mostly cloudy, with a high near 32. Northwest wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 8. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 22. North wind around 7 mph becoming east in the afternoon.
Monday Night
Mostly cloudy, with a low around 8.
Tuesday
A slight chance of snow. Mostly cloudy, with a high near 21. Chance of precipitation is 20%.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 9. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 25.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
11:52 am CST Jan 29, 2026
12pm CST Jan 29, 2026-6pm CST Feb 4, 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