Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

78°F

26°C

Humidity 49%
Wind Speed W 6 mph
Barometer 29.78 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 30 Aug 9:55 am CDT
Extended Forecast for

17 Miles NNW Gann Valley SD

  • Today

    Today: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 87. West southwest wind 6 to 8 mph.

    High: 87 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Southwest wind 6 to 13 mph becoming northeast in the evening.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Increasing clouds, with a high near 83. North northwest wind around 7 mph becoming east southeast in the afternoon.

    High: 83 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 62. East wind around 6 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 4pm.  Mostly cloudy, with a high near 81. Southeast wind 6 to 9 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers.  Mostly cloudy, with a low around 60. East northeast wind 6 to 8 mph.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. Southeast wind 9 to 11 mph.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 87. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 87. West southwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 61. Southwest wind 6 to 13 mph becoming northeast in the evening.
Monday
Increasing clouds, with a high near 83. North northwest wind around 7 mph becoming east southeast in the afternoon.
Monday Night
Mostly cloudy, with a low around 62. East wind around 6 mph.
Tuesday
Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 81. Southeast wind 6 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 60. East northeast wind 6 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny, with a high near 85. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 64. Southeast wind 9 to 11 mph.
Thursday
Mostly sunny, with a high near 87. South southwest wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64.
Friday
Mostly sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles NNW Gann Valley SD
 44.28°N 99.08°W (Elev. 1847 ft)
9:06 am CDT Aug 30, 2026
9am CDT Aug 30, 2026-6pm CDT Sep 5, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database