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Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Rain

73°F

23°C

Humidity 92%
Wind Speed NW 7 mph
Barometer 30.03 in
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 1 Sep 2:35 pm CDT
Extended Forecast for

Lower Brule SD

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a steady temperature around 72. East wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. Northeast wind 6 to 10 mph becoming north northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 84. Northeast wind 6 to 10 mph becoming east southeast in the afternoon.

    High: 84 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms between midnight and 1am. Partly cloudy, with a low around 66. East southeast wind 7 to 11 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 89. South southwest wind 5 to 7 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 90. Southeast wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 90 °F

    Hot

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 69. Southeast wind 9 to 11 mph. Chance of precipitation is 20%.

    Low: 69 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers before 1pm. Sunny and hot, with a high near 90. South wind 7 to 10 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a steady temperature around 72. East wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. Northeast wind 6 to 10 mph becoming north northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 84. Northeast wind 6 to 10 mph becoming east southeast in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms between midnight and 1am. Partly cloudy, with a low around 66. East southeast wind 7 to 11 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 89. South southwest wind 5 to 7 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 90. Southeast wind 5 to 14 mph, with gusts as high as 22 mph.
Friday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 69. Southeast wind 9 to 11 mph. Chance of precipitation is 20%.
Saturday
A slight chance of showers before 1pm. Sunny and hot, with a high near 90. South wind 7 to 10 mph. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Labor Day
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lower Brule SD
 44.07°N 99.58°W (Elev. 1444 ft)
Last Update:
2:06 pm CDT Sep 1, 2026
Forecast Valid:
2pm CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation