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

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 >

Hazardous Weather Conditions

Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Fair

70°F

21°C

Humidity 83%
Wind Speed NW 3 mph
Barometer 30.24 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 16 Aug 9:55 am CDT
Extended Forecast for

Lebanon SD

  • Today

    Today: Sunny, with a high near 80. North northwest wind 6 to 8 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 2am and 3am. Partly cloudy, with a low around 58. North wind 5 to 9 mph becoming south after midnight. Chance of precipitation is 20%.

    Low: 58 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 83. South wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Increasing clouds, with a low around 58. North northeast wind 5 to 9 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. North northeast wind 6 to 9 mph. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 54. North wind around 7 mph becoming southeast after midnight. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 77. East southeast wind 6 to 8 mph becoming south in the afternoon. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57. Southeast wind around 8 mph becoming south southwest after midnight. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 83. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 80. North northwest wind 6 to 8 mph.
Tonight
A slight chance of showers and thunderstorms between 2am and 3am. Partly cloudy, with a low around 58. North wind 5 to 9 mph becoming south after midnight. Chance of precipitation is 20%.
Monday
Sunny, with a high near 83. South wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
A chance of showers and thunderstorms. Increasing clouds, with a low around 58. North northeast wind 5 to 9 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. North northeast wind 6 to 9 mph. Chance of precipitation is 40%.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 54. North wind around 7 mph becoming southeast after midnight. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 77. East southeast wind 6 to 8 mph becoming south in the afternoon. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57. Southeast wind around 8 mph becoming south southwest after midnight. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 83. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lebanon SD
 45.07°N 99.78°W (Elev. 1955 ft)
Last Update:
9:37 am CDT Aug 16, 2026
Forecast Valid:
10am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
 
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