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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Fair

21°F

-6°C

Humidity 100%
Wind Speed S 10 mph
Barometer 30.33 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 11 Jan 2:35 am CST
Extended Forecast for

Agar SD

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 21. South wind 6 to 8 mph.

    Low: 21 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 48. South wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 48 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27. West wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 27 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50. West wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. West northwest wind 14 to 18 mph, with gusts as high as 29 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Breezy, with a west northwest wind 18 to 26 mph, with gusts as high as 38 mph.

    High: 50 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. Blustery, with a north northwest wind 15 to 20 mph, with gusts as high as 31 mph.

    Low: 23 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35. North wind 7 to 14 mph becoming south southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. South wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 21. South wind 6 to 8 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 48. South wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 27. West wind 8 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 50. West wind 8 to 15 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, with a low around 38. West northwest wind 14 to 18 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 50. Breezy, with a west northwest wind 18 to 26 mph, with gusts as high as 38 mph.
Tuesday Night
Mostly cloudy, with a low around 23. Blustery, with a north northwest wind 15 to 20 mph, with gusts as high as 31 mph.
Wednesday
Mostly sunny, with a high near 35. North wind 7 to 14 mph becoming south southwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 24. South wind 6 to 14 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 47. Windy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 30%.
Friday
A chance of snow. Mostly cloudy, with a high near 28. Windy. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 7. Blustery.
Saturday
Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Agar SD
 44.83°N 100.07°W (Elev. 1824 ft)
Last Update:
2:36 am CST Jan 11, 2026
Forecast Valid:
2am CST Jan 11, 2026-6pm CST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation