Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

26°F

-3°C

Humidity 96%
Wind Speed Calm
Barometer 29.91 in (1013.9 mb)
Dewpoint 25°F (-4°C)
Visibility NA
Last update 15 Feb 1:56 am CST
Extended Forecast for

Grenville SD

  • Overnight

    Overnight: Mostly clear, with a low around 32. West southwest wind around 7 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 56. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. South wind 7 to 10 mph becoming north after midnight.

    Low: 30 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 49. North wind 6 to 10 mph becoming east southeast in the afternoon.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. East southeast wind 10 to 18 mph, with gusts as high as 26 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of rain after noon.  Mostly cloudy, with a high near 49. Breezy, with an east southeast wind 18 to 23 mph, with gusts as high as 38 mph.  Chance of precipitation is 50%.

    High: 49 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain likely before 3am, then rain likely, possibly mixed with snow.  Mostly cloudy, with a low around 32. Breezy, with an east southeast wind 17 to 20 mph becoming west after midnight. Winds could gust as high as 28 mph.  Chance of precipitation is 70%.

    Low: 32 °F

    Rain Likely
    then
    Rain/Snow
    Likely and
    Breezy

  • Wednesday

    Wednesday: Rain and snow likely before noon, then a chance of snow.  Partly sunny, with a high near 38. Breezy, with a west northwest wind 20 to 23 mph, with gusts as high as 36 mph.  Chance of precipitation is 60%.

    High: 38 °F

    Breezy.
    Rain/Snow
    Likely then
    Chance Snow

  • Wednesday Night

    Wednesday Night: A slight chance of snow.  Mostly cloudy, with a low around 17. Blustery, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph.  Chance of precipitation is 20%.

    Low: 17 °F

    Slight Chance
    Snow and
    Blustery

Detailed Forecast

Overnight
Mostly clear, with a low around 32. West southwest wind around 7 mph.
Sunday
Mostly sunny, with a high near 56. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 30. South wind 7 to 10 mph becoming north after midnight.
Washington's Birthday
Sunny, with a high near 49. North wind 6 to 10 mph becoming east southeast in the afternoon.
Monday Night
Partly cloudy, with a low around 34. East southeast wind 10 to 18 mph, with gusts as high as 26 mph.
Tuesday
A chance of rain after noon. Mostly cloudy, with a high near 49. Breezy, with an east southeast wind 18 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 50%.
Tuesday Night
Rain likely before 3am, then rain likely, possibly mixed with snow. Mostly cloudy, with a low around 32. Breezy, with an east southeast wind 17 to 20 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%.
Wednesday
Rain and snow likely before noon, then a chance of snow. Partly sunny, with a high near 38. Breezy, with a west northwest wind 20 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 60%.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 17. Blustery, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Thursday
A chance of snow, mainly after noon. Mostly cloudy, with a high near 25. Blustery. Chance of precipitation is 30%.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 40%.
Friday
A chance of snow. Mostly cloudy, with a high near 21. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 21.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
1:36 am CST Feb 15, 2026
2am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database