Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Current conditions at

Yankton, Chan Gurney Municipal Airport (KYKN)

Lat: 42.92°NLon: 97.38°WElev: 1306ft.

Fog/Mist

73°F

23°C

Humidity 100%
Wind Speed E 5 mph
Barometer 30.01 in (1016.5 mb)
Dewpoint 73°F (23°C)
Visibility 4.00 mi
Last update 15 Aug 4:56 am CDT
Extended Forecast for

6 Miles WSW Yankton SD

  • Today

    Today: A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm.  Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 80. Light and variable wind becoming west around 6 mph in the afternoon.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm.  Mostly cloudy, with a low around 63. Northwest wind 3 to 7 mph.  New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 77. North wind 5 to 9 mph, with gusts as high as 16 mph.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am.  Increasing clouds, with a low around 60. North wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 4pm.  Mostly sunny, with a high near 80. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 64. South southwest wind 6 to 8 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm.  Mostly cloudy, with a high near 80. South wind 6 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 17 mph.  Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 60. North wind 5 to 9 mph.

    Low: 60 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Partly sunny, with a high near 73. North wind 5 to 8 mph.

    High: 73 °F

    Partly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 80. Light and variable wind becoming west around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 63. Northwest wind 3 to 7 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Sunny, with a high near 77. North wind 5 to 9 mph, with gusts as high as 16 mph.
Sunday Night
A 20 percent chance of showers after 1am. Increasing clouds, with a low around 60. North wind around 5 mph becoming calm in the evening.
Monday
A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 80. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. South southwest wind 6 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 80. South wind 6 to 9 mph becoming west northwest in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60. North wind 5 to 9 mph.
Wednesday
Partly sunny, with a high near 73. North wind 5 to 8 mph.
Wednesday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. North wind around 6 mph becoming light and variable.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74. Light south wind becoming south southeast 5 to 9 mph in the morning. Winds could gust as high as 17 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59. South wind around 7 mph.
Friday
Mostly sunny, with a high near 77. South wind 5 to 9 mph, with gusts as high as 16 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Yankton SD
 42.84°N 97.48°W (Elev. 1250 ft)
4:35 am CDT Aug 15, 2026
5am CDT Aug 15, 2026-6pm CDT Aug 21, 2026
 
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Additional Resources

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