National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

85°F

29°C

Humidity 46%
Wind Speed NE 13 mph
Barometer 29.95 in (1012.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Sep 12:53 pm CDT
Extended Forecast for

Clark SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. East southeast wind around 10 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 70. East wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Partly sunny, then gradually becoming sunny, with a high near 88. South southeast wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 88 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 70. Southeast wind 10 to 13 mph. Chance of precipitation is 10%.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 85. South southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southeast wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Labor Day

    Labor Day: Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south wind 17 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69. Breezy, with a south southeast wind 20 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. South southwest wind around 17 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 88. East southeast wind around 10 mph.
Tonight
A chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 70. East wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Partly sunny, then gradually becoming sunny, with a high near 88. South southeast wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
A slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 70. Southeast wind 10 to 13 mph. Chance of precipitation is 10%.
Sunday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 85. South southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southeast wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Labor Day
Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south wind 17 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69. Breezy, with a south southeast wind 20 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 82. South southwest wind around 17 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clark SD
 44.88°N 97.75°W (Elev. 1808 ft)
Last Update:
1:21 pm CDT Sep 4, 2026
Forecast Valid:
1pm CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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Additional Resources

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