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.

75°F

24°C

Humidity 94%
Wind Speed SE 10 mph
Barometer 29.82 in (1007.4 mb)
Dewpoint 73°F (23°C)
Visibility NA
Last update 27 Jul 1:56 am CDT
Extended Forecast for

9 Miles NE Grenville SD

Heat Advisory July 27, 01:00pm until July 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Overnight

    Overnight: Mostly cloudy, with a low around 69. West southwest wind around 8 mph.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88. Southwest wind 11 to 15 mph, with gusts as high as 26 mph.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, mainly between midnight and 1am.  Partly cloudy, with a low around 67. Northwest wind 7 to 11 mph becoming east northeast in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 81. East northeast wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 62. Northeast wind 9 to 14 mph, with gusts as high as 22 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 9 to 11 mph, with gusts as high as 20 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. Northeast wind 7 to 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 7 to 11 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. East wind 6 to 10 mph.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. West southwest wind around 8 mph.
Sunday
Mostly sunny, with a high near 88. Southwest wind 11 to 15 mph, with gusts as high as 26 mph.
Sunday Night
A slight chance of showers and thunderstorms, mainly between midnight and 1am. Partly cloudy, with a low around 67. Northwest wind 7 to 11 mph becoming east northeast in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 81. East northeast wind 8 to 13 mph, with gusts as high as 22 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Northeast wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Tuesday
A slight chance of showers before 1pm. Mostly sunny, with a high near 76. Northeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 60. Northeast wind 7 to 10 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 73. Northeast wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, 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 56.
Friday
Mostly sunny, with a high near 73.
Friday Night
Mostly cloudy, with a low around 57.
Saturday
A slight chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 20%.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NE Grenville SD
 45.55°N 97.25°W (Elev. 2001 ft)
2:00 am CDT Jul 27, 2025
2am CDT Jul 27, 2025-6pm CDT Aug 2, 2025
 
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Additional Resources

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