June 12-13: Severe thunderstorms transitioned from a supercell to a line of storms over western and then south central South Dakota during the evening of June 12th. In addition to destructive straight-line winds, these storms produced two confirmed EF2 tornadoes across Jones County in the "bookend vortex" section of the line. A third tornado was observed west of Lower Brule, as the complex continued to track east into the early morning of June 13th. Later in the night, a second line of training thunderstorms would set up over parts of Jones and Stanley counties, resulting in areas of flooding. Additionally, a small area of low pressure developed behind the system. This is referred to as a "wake low" and resulted in additional non-thunderstorm winds and wind damage over parts of eastern South Dakota.  

June 14: Right after midnight on June 14th, storms developed over south central South Dakota and quickly became wind producers. As the storms intensified and tracked northeast, the winds became increasingly extreme. Peak winds would occur between 4 and 5 am as the storms tracked across parts of north central and northeast South Dakota and into southeast North Dakota. A personal weather station near Roscoe, SD recorded winds at 120 mph. Numerous trees and powerlines were downed, widespread reports of roof, outbuilding and grain bin damage were noted, and 16 steel towers were downed approximately 7 miles WSW of Frederick. Damage was widespread.

Due to the damage from several rounds of significant severe weather across South Dakota from June 11-14th, a Presidential Disaster Declaration was approved on August 2nd for a number of counties.