Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

A Few Clouds

76°F

24°C

Humidity 52%
Wind Speed NW 14 mph
Barometer 30.16 in (1020.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 16 Aug 1:53 pm CDT
Extended Forecast for

Vienna SD

  • This Afternoon

    This Afternoon: Sunny, with a steady temperature around 74. Northwest wind around 10 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms after 5pm.  Sunny, with a high near 83. West southwest wind 7 to 14 mph.  Chance of precipitation is 10%.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers after 1am.  Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 60. West northwest wind 5 to 9 mph becoming light and variable.  Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 75. North wind around 7 mph.  Chance of precipitation is 50%.

    High: 75 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 56. Northeast wind around 6 mph becoming south southeast after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 76. South southwest wind 5 to 7 mph.  Chance of precipitation is 20%.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 57. West wind around 6 mph becoming south in the evening.  Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 79. South wind 7 to 13 mph.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a steady temperature around 74. Northwest wind around 10 mph.
Tonight
Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm.
Monday
A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 83. West southwest wind 7 to 14 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers after 1am. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 60. West northwest wind 5 to 9 mph becoming light and variable. Chance of precipitation is 20%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. North wind around 7 mph. Chance of precipitation is 50%.
Tuesday Night
Mostly cloudy, with a low around 56. Northeast wind around 6 mph becoming south southeast after midnight.
Wednesday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 76. South southwest wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57. West wind around 6 mph becoming south in the evening. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 79. South wind 7 to 13 mph.
Thursday Night
Mostly clear, with a low around 61.
Friday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna SD
 44.71°N 97.5°W (Elev. 1801 ft)
2:36 pm CDT Aug 16, 2026
2pm CDT Aug 16, 2026-6pm CDT Aug 22, 2026
 
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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