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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

65°F

18°C

Humidity 81%
Wind Speed NW 10 mph
Barometer 29.98 in (1014.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 10 Aug 8:53 am CDT
Extended Forecast for

Clark SD

  • Today

    Today: Mostly sunny, with a high near 74. West northwest wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Areas of smoke after 9pm. Partly cloudy, with a low around 59. West northwest wind 5 to 7 mph becoming south after midnight.

    Low: 59 °F

    Areas Smoke

  • Monday

    Monday: Areas of smoke before noon. Mostly sunny, with a high near 82. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 82 °F

    Areas Smoke
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. South wind 8 to 10 mph becoming northwest after midnight.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. North northwest wind 8 to 10 mph.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. North northwest wind 6 to 8 mph becoming southeast after midnight.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Southeast wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Southeast wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 85. South wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 85 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 74. West northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Tonight
Areas of smoke after 9pm. Partly cloudy, with a low around 59. West northwest wind 5 to 7 mph becoming south after midnight.
Monday
Areas of smoke before noon. Mostly sunny, with a high near 82. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 60. South wind 8 to 10 mph becoming northwest after midnight.
Tuesday
Sunny, with a high near 76. North northwest wind 8 to 10 mph.
Tuesday Night
Mostly clear, with a low around 58. North northwest wind 6 to 8 mph becoming southeast after midnight.
Wednesday
Sunny, with a high near 80. Southeast wind 9 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Southeast wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 85. South wind 16 to 18 mph, with gusts as high as 28 mph.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 84.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clark SD
 44.88°N 97.75°W (Elev. 1808 ft)
Last Update:
9:16 am CDT Aug 10, 2025
Forecast Valid:
9am CDT Aug 10, 2025-6pm CDT Aug 16, 2025
 
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