Heavy Rain in the Mid-Atlantic; Severe Thunderstorms in the Northern Plains; Critical Fire in the West

Locally heavy rain and flash flooding will be possible today into tonight near the Mid-Atlantic/Carolina coast. Storms with large hail and severe wind gusts are expected across parts of the central and northern Plains into the upper Mississippi Valley. Dry thunderstorms, and warm, dry, and windy conditions will produce fire weather conditions in parts of the Great Basin and northern Rockies. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

66°F

19°C

Humidity 100%
Wind Speed SE 10 mph
Barometer 29.85 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 14 Aug 7:55 am CDT
Extended Forecast for

Stephan SD

  • Today

    Today: Sunny and hot, with a high near 96. Heat index values as high as 100. South wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 96 °F

    Hot

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 10pm and 1am.  Partly cloudy, with a low around 68. South southeast wind around 10 mph becoming north after midnight.  Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A slight chance of showers before 1pm.  Partly sunny, with a high near 89. East wind 11 to 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly before 1am.  Mostly cloudy, with a low around 66. East northeast wind 10 to 14 mph.  Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 88. East northeast wind 10 to 15 mph.

    High: 88 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 66. East wind 10 to 15 mph.  Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 88. East southeast wind 10 to 13 mph.  Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 65. East northeast wind 9 to 13 mph.  Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 88. Northeast wind 9 to 11 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 96. Heat index values as high as 100. South wind 10 to 15 mph, with gusts as high as 23 mph.
Tonight
A slight chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 68. South southeast wind around 10 mph becoming north after midnight. Chance of precipitation is 20%.
Friday
A slight chance of showers before 1pm. Partly sunny, with a high near 89. East wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 66. East northeast wind 10 to 14 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 88. East northeast wind 10 to 15 mph.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. East wind 10 to 15 mph. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East southeast wind 10 to 13 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. East northeast wind 9 to 13 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 88. Northeast wind 9 to 11 mph.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Stephan SD
 44.25°N 99.44°W (Elev. 1811 ft)
7:45 am CDT Aug 14, 2025
8am CDT Aug 14, 2025-6pm CDT Aug 20, 2025
 
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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