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 >

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

13°F

-11°C

Humidity 77%
Wind Speed NW 15 mph
Barometer 29.99 in (1019.5 mb)
Dewpoint 7°F (-14°C)
Visibility NA
Wind Chill-3°F (-19°C)
Last update 20 Feb 5:56 pm CST
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 2. Northwest wind 7 to 11 mph.

    Low: 2 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 16. Northwest wind 8 to 13 mph.

    High: 16 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 1. North northwest wind 11 to 13 mph, with gusts as high as 24 mph.

    Low: 1 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 11. North northwest wind 14 to 16 mph, with gusts as high as 25 mph.

    High: 11 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -3. North northwest wind 5 to 13 mph becoming east northeast after midnight.

    Low: -3 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 23. East wind 5 to 14 mph becoming south in the afternoon. Winds could gust as high as 23 mph.

    High: 23 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. South wind 13 to 16 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow after noon.  Partly sunny, with a high near 35. West southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.  Chance of precipitation is 20%.

    High: 35 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: A chance of snow after midnight.  Mostly cloudy, with a low around 15. North northwest wind around 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    Low: 15 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 2. Northwest wind 7 to 11 mph.
Saturday
Partly sunny, with a high near 16. Northwest wind 8 to 13 mph.
Saturday Night
Partly cloudy, with a low around 1. North northwest wind 11 to 13 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 11. North northwest wind 14 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around -3. North northwest wind 5 to 13 mph becoming east northeast after midnight.
Monday
Mostly sunny, with a high near 23. East wind 5 to 14 mph becoming south in the afternoon. Winds could gust as high as 23 mph.
Monday Night
Partly cloudy, with a low around 17. South wind 13 to 16 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.
Tuesday
A slight chance of snow after noon. Partly sunny, with a high near 35. West southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of snow after midnight. Mostly cloudy, with a low around 15. North northwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday
A slight chance of snow before noon. Partly sunny, with a high near 26. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 13.
Thursday
Sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 27.
Friday
Mostly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.37°W (Elev. 1795 ft)
5:36 pm CST Feb 20, 2026
5pm CST Feb 20, 2026-6pm CST Feb 27, 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