Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

82°F

28°C

Humidity 41%
Wind Speed SE 8 mph
Barometer 30.14 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 27 Aug 1:55 pm CDT
Extended Forecast for

7 Miles E Fort Thompson SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 84. Southeast wind around 9 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. East southeast wind around 10 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny and hot, with a high near 90. Breezy, with a south southeast wind 11 to 20 mph, with gusts as high as 29 mph.

    High: 90 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly between 10pm and 4am.  Mostly clear during the early evening, then becoming mostly cloudy, with a low around 68. South southeast wind 10 to 17 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 91. South southeast wind around 7 mph becoming west northwest in the afternoon.

    High: 91 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 68. East wind 7 to 9 mph.

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 90. North wind 6 to 9 mph becoming south in the afternoon.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. East wind around 8 mph becoming west northwest after midnight.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 86. North northwest wind 8 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 86 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 84. Southeast wind around 9 mph.
Tonight
Mostly clear, with a low around 63. East southeast wind around 10 mph.
Friday
Partly sunny and hot, with a high near 90. Breezy, with a south southeast wind 11 to 20 mph, with gusts as high as 29 mph.
Friday Night
A chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly clear during the early evening, then becoming mostly cloudy, with a low around 68. South southeast wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday
Mostly sunny and hot, with a high near 91. South southeast wind around 7 mph becoming west northwest in the afternoon.
Saturday Night
Mostly cloudy, with a low around 68. East wind 7 to 9 mph.
Sunday
Mostly sunny and hot, with a high near 90. North wind 6 to 9 mph becoming south in the afternoon.
Sunday Night
Partly cloudy, with a low around 67. East wind around 8 mph becoming west northwest after midnight.
Monday
Partly sunny, with a high near 86. North northwest wind 8 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 86.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles E Fort Thompson SD
 44.06°N 99.28°W (Elev. 1565 ft)
2:06 pm CDT Aug 27, 2026
2pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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