Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

-2°F

-19°C

Humidity 75%
Wind Speed W 6 mph
Barometer 30.20 in (1027.7 mb)
Dewpoint -8°F (-22°C)
Visibility NA
Wind Chill-14°F (-26°C)
Last update 20 Jan 3:56 am CST
Extended Forecast for

Grenville SD

  • Today

    Today: A chance of snow after noon.  Mostly cloudy, with a high near 16. Wind chill values as low as -18. South southwest wind 7 to 10 mph.  Chance of precipitation is 50%.

    High: 16 °F

    Partly Sunny
    then Chance
    Snow

  • Tonight

    Tonight: A chance of snow, mainly before 9pm.  Mostly cloudy, with a low around 10. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.

    Low: 10 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Snow likely, mainly before noon.  Patchy blowing snow after 9am. Mostly cloudy, with a high near 22. Blustery, with a northwest wind 16 to 21 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 41 mph.  Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 22 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Patchy blowing snow before 8pm. Mostly cloudy, with a low around 0. Blustery, with a west northwest wind 14 to 21 mph, with gusts as high as 33 mph.

    Low: 0 °F

    Patchy
    Blowing Snow
    and Blustery
    then Mostly
    Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 4. Northwest wind 14 to 18 mph, with gusts as high as 29 mph.

    High: 4 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -25. North northwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: -25 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -13. West northwest wind 6 to 9 mph.

    High: -13 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -20. West northwest wind around 7 mph becoming south after midnight.

    Low: -20 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near -3. South wind 7 to 9 mph.

    High: -3 °F

    Cold

Detailed Forecast

Today
A chance of snow after noon. Mostly cloudy, with a high near 16. Wind chill values as low as -18. South southwest wind 7 to 10 mph. Chance of precipitation is 50%.
Tonight
A chance of snow, mainly before 9pm. Mostly cloudy, with a low around 10. West northwest wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday
Snow likely, mainly before noon. Patchy blowing snow after 9am. Mostly cloudy, with a high near 22. Blustery, with a northwest wind 16 to 21 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Wednesday Night
Patchy blowing snow before 8pm. Mostly cloudy, with a low around 0. Blustery, with a west northwest wind 14 to 21 mph, with gusts as high as 33 mph.
Thursday
Partly sunny and cold, with a high near 4. Northwest wind 14 to 18 mph, with gusts as high as 29 mph.
Thursday Night
Partly cloudy, with a low around -25. North northwest wind 9 to 14 mph, with gusts as high as 24 mph.
Friday
Sunny and cold, with a high near -13. West northwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around -20. West northwest wind around 7 mph becoming south after midnight.
Saturday
Mostly sunny and cold, with a high near -3. South wind 7 to 9 mph.
Saturday Night
Partly cloudy, with a low around -12.
Sunday
Mostly sunny and cold, with a high near 7.
Sunday Night
Partly cloudy, with a low around -6.
Monday
Mostly sunny, with a high near 17.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
3:36 am CST Jan 20, 2026
4am CST Jan 20, 2026-6pm CST Jan 26, 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