National Weather Service United States Department of Commerce

Hot temperatures will continue into Monday with high temperature readings a good 5 to 10 degrees above normal. This combined with high humidity values will push afternoon heat indices into the mid 90s to around 102 degrees.
A Slight Risk (level 2 out of 5) is in place across mainly northeast South Dakota and west central Minnesota for afternoon and evening strong to severe thunderstorms. Hail up to 1 inch in diameter and thunderstorm wind gusts 60 to 70 mph will be possible.
A Slight Risk (level 2 out of 5) for severe storms remains in place across most of central and northeast South Dakota and west central Minnesota; and also covers a portion of north central South Dakota for Tuesday afternoon and evening strong to severe thunderstorms. Hail up to 1 inch in diameter and thunderstorm wind gusts of 60 to 70 mph are possible. A couple of tornadoes could happen, too. Excessive heavy rain Tuesday night is possible.
Whether during the day or at night, have a way of receiving severe weather alerts, and make sure to have the needed supplies on hand and a plan to activate if severe weather lands on your doorstep.