National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

10°F

-12°C

Humidity 84%
Wind Speed Calm
Barometer 29.98 in (1019.1 mb)
Dewpoint 6°F (-14°C)
Visibility NA
Last update 2 Jan 3:56 am CST
Extended Forecast for

Grenville SD

  • Today

    Today: Patchy fog before 10am. Otherwise, cloudy, with a high near 18. East wind 3 to 5 mph.

    High: 18 °F

    Patchy Fog
    then Cloudy

  • Tonight

    Tonight: A slight chance of snow between 9pm and 10pm. Cloudy, with a steady temperature around 17. East southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 20%.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 21. West southwest wind around 7 mph becoming north in the afternoon.

    High: 21 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 11. North northeast wind 6 to 14 mph becoming southeast after midnight. Winds could gust as high as 22 mph.

    Low: 11 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 34. Southeast wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 34 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23. South wind around 8 mph becoming west in the evening.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35. Southwest wind 6 to 8 mph.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 24. South southwest wind 7 to 10 mph becoming west after midnight. Chance of precipitation is 20%.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. West wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 34 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, cloudy, with a high near 18. East wind 3 to 5 mph.
Tonight
A slight chance of snow between 9pm and 10pm. Cloudy, with a steady temperature around 17. East southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 21. West southwest wind around 7 mph becoming north in the afternoon.
Saturday Night
Mostly cloudy, with a low around 11. North northeast wind 6 to 14 mph becoming southeast after midnight. Winds could gust as high as 22 mph.
Sunday
Mostly cloudy, with a high near 34. Southeast wind 8 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 23. South wind around 8 mph becoming west in the evening.
Monday
Partly sunny, with a high near 35. Southwest wind 6 to 8 mph.
Monday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 24. South southwest wind 7 to 10 mph becoming west after midnight. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 34. West wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 21.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 34.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.37°W (Elev. 1795 ft)
Last Update:
3:36 am CST Jan 2, 2026
Forecast Valid:
4am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation