In Indiana, 37 tornadoes formed, breaking the single-day record of 21 set during the Super Outbreak on April 3, 1974.

[2] On June 2, an unseasonably intense surface low over eastern North Dakota brought with it a cold front across the Mississippi Valley.

Ahead of the front, a highly unstable air mass combined with a strong jet stream that increased the synoptic-scale lifting favoring supercell development.

[2] This extremely long-tracked F4 tornado began near Aden, littering I-64 with trees and overturning a truck before striking Barnhill, where 10 homes were destroyed and 10 others were damaged.

Carmel, the tornado ripped apart seventeen homes and severely damaged Wabash Valley College before crossing into Indiana.

[4] A powerful F4 tornado developed west of Union and proceeded to enter that community from Gibson County.

The tornado then continued to produce F4 damage in Ohio as it hit the communities of Harrison, Crosby Township, and New Baltimore.