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

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

87°F

31°C

Humidity 65%
Wind Speed Vrbl 6 mph
Barometer 29.89 in (1010.9 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 25 Jul 12:53 pm CDT
Extended Forecast for

Lake Norden SD

Heat Advisory until July 26, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 26, 09:00pm

    NOW until 9:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 98 °F

    Hot

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 74. South southeast wind 8 to 10 mph becoming southwest in the evening. Chance of precipitation is 50%.

    Low: 74 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 107. South wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 10%.

    High: 99 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71. South wind 5 to 8 mph becoming north northwest after midnight.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 95. North northeast wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. North northeast wind 5 to 7 mph becoming east southeast after midnight.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 93. East northeast wind 5 to 8 mph becoming south southwest in the afternoon.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. East wind 5 to 7 mph becoming south southeast after midnight.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 98. Heat index values as high as 104. South southeast wind 6 to 9 mph.
Tonight
A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 74. South southeast wind 8 to 10 mph becoming southwest in the evening. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 107. South wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 10%.
Sunday Night
Mostly clear, with a low around 71. South wind 5 to 8 mph becoming north northwest after midnight.
Monday
Sunny and hot, with a high near 95. North northeast wind 8 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 70. North northeast wind 5 to 7 mph becoming east southeast after midnight.
Tuesday
Mostly sunny and hot, with a high near 93. East northeast wind 5 to 8 mph becoming south southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 70. East wind 5 to 7 mph becoming south southeast after midnight.
Wednesday
Mostly sunny and hot, with a high near 93. South wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 68. Chance of precipitation is 30%.
Friday
Sunny and hot, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Norden SD
 44.56°N 97.23°W (Elev. 1699 ft)
Last Update:
12:36 pm CDT Jul 25, 2026
Forecast Valid:
1pm CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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Additional Resources

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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