Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Current conditions at

Ortonville, Ortonville Muncipal-Martinson Field Airport (KVVV)

Lat: 45.31°NLon: 96.42°WElev: 1099ft.

Fair

72°F

22°C

Humidity 88%
Wind Speed Calm
Barometer 29.45 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 21 Jun 6:47 am CDT
Extended Forecast for

Big Stone City SD

Heat Advisory June 21, 01:00pm until June 21, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny and hot, with a high near 98. Heat index values as high as 104. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 98 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 73. West southwest wind around 7 mph becoming north after midnight.

    Low: 73 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Sunny and hot, with a high near 95. Heat index values as high as 101. Breezy, with a south wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 95 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms.  Increasing clouds, with a low around 63. Northwest wind 10 to 18 mph, with gusts as high as 29 mph.  Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 75. Northwest wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. North northwest wind 5 to 9 mph becoming light north  after midnight.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 71. East wind 3 to 8 mph.

    High: 71 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 59. East wind 5 to 8 mph.  Chance of precipitation is 60%.

    Low: 59 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm.  Cloudy, with a high near 70. East northeast wind 6 to 9 mph.  Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny and hot, with a high near 98. Heat index values as high as 104. Calm wind becoming south 5 to 9 mph in the afternoon.
Tonight
Increasing clouds, with a low around 73. West southwest wind around 7 mph becoming north after midnight.
Sunday
Sunny and hot, with a high near 95. Heat index values as high as 101. Breezy, with a south wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A chance of showers and thunderstorms. Increasing clouds, with a low around 63. Northwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 75. Northwest wind 10 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 53. North northwest wind 5 to 9 mph becoming light north after midnight.
Tuesday
Partly sunny, with a high near 71. East wind 3 to 8 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. East wind 5 to 8 mph. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 70. East northeast wind 6 to 9 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 59. Chance of precipitation is 50%.
Thursday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 57.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Big Stone City SD
 45.3°N 96.49°W (Elev. 1099 ft)
7:45 am CDT Jun 21, 2025
8am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database