At the higher levels, winds flowed from the southwest to the northeast in relation to the jet stream; however, closer to the surface, the inflow from the low pressure system over South Dakota resulted in a south to north flow, allowing for rotation within storms.
In the upper regions, winds blew from the southwest toward the northeast relative to the jet stream. Closer to the surface, the influx of air from the low-pressure area in South Dakota caused a south-to-north movement, which facilitated storm rotation.