Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

73°F

23°C

Humidity 72%
Wind Speed N 16 G 29 mph
Barometer 29.81 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 30 Aug 11:55 pm CDT
Extended Forecast for

2 Miles NW Fort Thompson SD

  • Overnight

    Overnight: Partly cloudy, with a low around 63. Northwest wind 9 to 16 mph.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86. West northwest wind around 6 mph becoming south southwest in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 62. South wind around 5 mph becoming light and variable  after midnight.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 81. Light and variable wind becoming east southeast 5 to 9 mph in the morning.  Chance of precipitation is 50%.

    High: 81 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am.  Mostly cloudy, with a low around 59. East northeast 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.

    Low: 59 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Southeast wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. Southeast wind 8 to 13 mph.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 91. South wind around 8 mph.

    High: 91 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. East southeast wind 5 to 7 mph.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 63. Northwest wind 9 to 16 mph.
Monday
Mostly sunny, with a high near 86. West northwest wind around 6 mph becoming south southwest in the afternoon.
Monday Night
Mostly cloudy, with a low around 62. South wind around 5 mph becoming light and variable after midnight.
Tuesday
A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Light and variable wind becoming east southeast 5 to 9 mph in the morning. Chance of precipitation is 50%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 59. East northeast 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.
Wednesday
Mostly sunny, with a high near 87. Southeast wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 65. Southeast wind 8 to 13 mph.
Thursday
Sunny and hot, with a high near 91. South wind around 8 mph.
Thursday Night
Mostly clear, with a low around 66. East southeast wind 5 to 7 mph.
Friday
Sunny and hot, with a high near 93.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny and hot, with a high near 92. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Fort Thompson SD
 44.07°N 99.43°W (Elev. 1480 ft)
11:36 pm CDT Aug 30, 2026
12am CDT Aug 31, 2026-6pm CDT Sep 6, 2026
 
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Additional Resources

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Hourly Weather Forecast

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