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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

43°F

6°C

Humidity 66%
Wind Speed SE 7 mph
Barometer 30.11 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Nov 7:55 pm CST
Extended Forecast for

Iona SD

  • Tonight

    Tonight: Partly cloudy, with a low around 35. South southeast wind 10 to 13 mph.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 66. Southwest wind 6 to 10 mph becoming east southeast in the afternoon.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. Southeast wind 9 to 13 mph becoming southwest after midnight.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76. Southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44. Southwest wind 14 to 18 mph becoming northwest after midnight. Winds could gust as high as 26 mph.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 57. Breezy, with a northwest wind 14 to 21 mph, with gusts as high as 30 mph.

    High: 57 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. West wind around 11 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 53. West wind 10 to 15 mph becoming east southeast in the afternoon.

    High: 53 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 35. East southeast wind 15 to 18 mph.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 35. South southeast wind 10 to 13 mph.
Thursday
Sunny, with a high near 66. Southwest wind 6 to 10 mph becoming east southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 42. Southeast wind 9 to 13 mph becoming southwest after midnight.
Friday
Sunny, with a high near 76. Southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 44. Southwest wind 14 to 18 mph becoming northwest after midnight. Winds could gust as high as 26 mph.
Saturday
Mostly sunny, with a high near 57. Breezy, with a northwest wind 14 to 21 mph, with gusts as high as 30 mph.
Saturday Night
Partly cloudy, with a low around 34. West wind around 11 mph.
Sunday
Mostly sunny, with a high near 53. West wind 10 to 15 mph becoming east southeast in the afternoon.
Sunday Night
Mostly cloudy, with a low around 35. East southeast wind 15 to 18 mph.
Monday
A chance of rain and snow before noon, then a chance of rain. Mostly cloudy, with a high near 46. Chance of precipitation is 50%.
Monday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A slight chance of rain. Partly sunny, with a high near 41. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Iona SD
 43.54°N 99.44°W (Elev. 1923 ft)
Last Update:
7:36 pm CST Nov 12, 2025
Forecast Valid:
8pm CST Nov 12, 2025-6pm CST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation