Heavy Rainfall and Flooding Concerns in the Southwest; Coastal Low to Impact the East Coast

Deep tropical moisture will lead to widespread showers and thunderstorms capable of producing flash flooding through early next week over the Southwest and Four Corners. A coastal storm is expected to impact the southeast U.S. coast and mid-Atlantic regions with flooding, dangerous rip currents, gusty winds and heavy rain up much of the East Coast through early next week. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair and Breezy

N/A

Humidity NA
Wind Speed SE 22 G 25 mph
Barometer 29.64 in
Dewpoint N/A
Visibility 10.00 mi
Last update 11 Oct 7:35 pm CDT
Extended Forecast for

Iona SD

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 3am.  Cloudy, then gradually becoming partly cloudy, with a low around 63. Breezy, with a south southeast wind 25 to 28 mph, with gusts as high as 40 mph.  Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Increasing clouds, with a high near 75. Windy, with a south wind 23 to 30 mph becoming west northwest in the afternoon. Winds could gust as high as 43 mph.

    High: 75 °F

    Increasing
    Clouds and
    Windy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Breezy, with a west northwest wind 14 to 23 mph, with gusts as high as 33 mph.

    Low: 40 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 58. Northwest wind 10 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 21 mph.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers after 1am.  Mostly cloudy, with a low around 43. East wind 11 to 14 mph.  Chance of precipitation is 20%.

    Low: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly before 1pm.  Mostly cloudy, with a high near 51. East wind 15 to 17 mph, with gusts as high as 26 mph.  Chance of precipitation is 40%.

    High: 51 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 1am.  Mostly cloudy, with a low around 44. East southeast wind around 15 mph, with gusts as high as 23 mph.  Chance of precipitation is 20%.

    Low: 44 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. Breezy, with an east southeast wind 14 to 21 mph, with gusts as high as 31 mph.

    High: 64 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 54. Breezy, with a southeast wind 18 to 21 mph, with gusts as high as 29 mph.  Chance of precipitation is 40%.

    Low: 54 °F

    Breezy.
    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly before 3am. Cloudy, then gradually becoming partly cloudy, with a low around 63. Breezy, with a south southeast wind 25 to 28 mph, with gusts as high as 40 mph. Chance of precipitation is 30%.
Sunday
Increasing clouds, with a high near 75. Windy, with a south wind 23 to 30 mph becoming west northwest in the afternoon. Winds could gust as high as 43 mph.
Sunday Night
Mostly clear, with a low around 40. Breezy, with a west northwest wind 14 to 23 mph, with gusts as high as 33 mph.
Columbus Day
Sunny, with a high near 58. Northwest wind 10 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 21 mph.
Monday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 43. East wind 11 to 14 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 51. East wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Tuesday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 44. East southeast wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 64. Breezy, with an east southeast wind 14 to 21 mph, with gusts as high as 31 mph.
Wednesday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 54. Breezy, with a southeast wind 18 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
Thursday
A chance of showers, mainly before 1pm. Mostly sunny, with a high near 72. Breezy. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 64. Breezy.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 62. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Iona SD
 43.54°N 99.44°W (Elev. 1923 ft)
7:36 pm CDT Oct 11, 2025
7pm CDT Oct 11, 2025-6pm CDT Oct 18, 2025
 
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Additional Resources

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