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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

23°F

-5°C

Humidity 92%
Wind Speed NW 13 mph
Barometer 29.82 in (1012.1 mb)
Dewpoint 21°F (-6°C)
Visibility NA
Wind Chill11°F (-12°C)
Last update 26 Dec 5:56 am CST
Extended Forecast for

Grenville SD

Dense Fog Advisory December 26, 06:37am until December 26, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 26, 06:37am until December 26, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Today

    High: 34 °F

    Areas Dense
    Freezing Fog
    and Areas
    Dense Fog

  • Tonight

    Tonight: Areas of fog. Otherwise, mostly cloudy, with a temperature rising to around 37 by 3am. South wind 8 to 13 mph.

    Low: 33 °F⇑

    Areas Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 40. South wind 7 to 11 mph becoming north in the afternoon.

    High: 40 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 9. Blustery, with a north northwest wind 8 to 13 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.

    Low: 9 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    and Blustery

  • Sunday

    Sunday: A slight chance of snow before noon. Mostly cloudy, with a high near 16. Blustery, with a northwest wind 23 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 20%.

    High: 16 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 1. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 37 mph.

    Low: 1 °F

    Mostly Cloudy
    and Blustery

  • Monday

    Monday: Mostly sunny, with a high near 13. Northwest wind 10 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 13 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 9. West southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 9 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy dense fog before 9am, then areas of dense fog after 11am. Areas of dense freezing fog between 9am and 11am. Otherwise, partly sunny, with a high near 34. Northwest wind 5 to 9 mph becoming light and variable.
Tonight
Areas of fog. Otherwise, mostly cloudy, with a temperature rising to around 37 by 3am. South wind 8 to 13 mph.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 40. South wind 7 to 11 mph becoming north in the afternoon.
Saturday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 9. Blustery, with a north northwest wind 8 to 13 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.
Sunday
A slight chance of snow before noon. Mostly cloudy, with a high near 16. Blustery, with a northwest wind 23 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 1. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 37 mph.
Monday
Mostly sunny, with a high near 13. Northwest wind 10 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Partly cloudy, with a low around 9. West southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 31. West wind 14 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
A chance of snow after midnight. Mostly cloudy, with a low around 5. Chance of precipitation is 30%.
Wednesday
A slight chance of snow. Mostly cloudy, with a high near 13. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 0.
New Year's Day
Mostly sunny and cold, with a high near 10.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
6:06 am CST Dec 26, 2025
Forecast Valid:
6am CST Dec 26, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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