Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

87°F

31°C

Humidity 65%
Wind Speed S 7 mph
Barometer 29.81 in (1007.0 mb)
Dewpoint 74°F (23°C)
Visibility NA
Heat Index95°F (35°C)
Last update 26 Jul 4:56 pm CDT
Extended Forecast for

9 Miles E Lake City SD

Heat Advisory July 27, 01:00pm until July 27, 08:00pm
Heat Advisory July 26, 05:49pm until July 26, 08:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Heat Advisory July 26, 05:49pm until July 26, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 89. South southwest wind around 14 mph, with gusts as high as 24 mph.  Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly before 10pm.  Mostly clear, with a low around 67. West wind 10 to 13 mph becoming north northwest after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 80. North wind 10 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 62. Northeast wind 10 to 13 mph.  Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers before 1pm.  Mostly sunny, with a high near 76. Northeast wind around 11 mph.  Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 1am.  Mostly cloudy, with a low around 60. North northeast wind around 10 mph.  Chance of precipitation is 20%.

    Low: 60 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. Northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between midnight and 2am. Increasing clouds, with a low around 69. South wind 6 to 13 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. South southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, mainly before 10pm. Mostly clear, with a low around 67. West wind 10 to 13 mph becoming north northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 80. North wind 10 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Northeast wind 10 to 13 mph. Chance of precipitation is 50%.
Tuesday
A slight chance of showers before 1pm. Mostly sunny, with a high near 76. Northeast wind around 11 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 60. North northeast wind around 10 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 73. Northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 57. East wind 6 to 10 mph.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 73.
Friday Night
Mostly cloudy, with a low around 58.
Saturday
A slight chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles E Lake City SD
 45.74°N 97.22°W (Elev. 1873 ft)
4:45 pm CDT Jul 26, 2025
5pm CDT Jul 26, 2025-6pm CDT Aug 2, 2025
 
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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