Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring elevated to critical fire weather conditions to the southern High Plains through the weekend. A winter storm will track across the Great Lakes and Northeast U.S. into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

7°F

-14°C

Humidity 76%
Wind Speed NW 9 mph
Barometer 30.19 in (1026.4 mb)
Dewpoint 1°F (-17°C)
Visibility NA
Wind Chill-6°F (-21°C)
Last update 21 Feb 3:56 am CST
Extended Forecast for

Grenville SD

  • Today

    Today: Partly sunny, with a high near 14. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 14 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 1. North northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 1 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and cold, with a high near 10. North northwest wind 14 to 16 mph, with gusts as high as 25 mph.

    High: 10 °F

    Cold

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -5. North wind 5 to 13 mph becoming east after midnight. Winds could gust as high as 21 mph.

    Low: -5 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 24. East southeast wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 35. West southwest wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 35 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow after midnight.  Mostly cloudy, with a low around 16. West northwest wind 14 to 16 mph.  Chance of precipitation is 30%.

    Low: 16 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of snow, mainly before noon.  Partly sunny, with a high near 29. North northwest wind 16 to 18 mph, with gusts as high as 26 mph.  Chance of precipitation is 30%.

    High: 29 °F

    Chance Snow

Detailed Forecast

Today
Partly sunny, with a high near 14. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 1. North northwest wind around 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny and cold, with a high near 10. North northwest wind 14 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around -5. North wind 5 to 13 mph becoming east after midnight. Winds could gust as high as 21 mph.
Monday
Mostly sunny, with a high near 24. East southeast wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph.
Monday Night
Partly cloudy, with a low around 19. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.
Tuesday
Partly sunny, with a high near 35. West southwest wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
A chance of snow after midnight. Mostly cloudy, with a low around 16. West northwest wind 14 to 16 mph. Chance of precipitation is 30%.
Wednesday
A chance of snow, mainly before noon. Partly sunny, with a high near 29. North northwest wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Wednesday Night
A slight chance of snow. Partly cloudy, with a low around 14. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 43. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.37°W (Elev. 1795 ft)
4:36 am CST Feb 21, 2026
4am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database