EF0 tornado in Kosciusko County, Indiana

A tornado touched down just west of the intersection of South County Road 700 North and South Beaver Dam Road, causing damage to trees to properties on either side of that intersection, with debris left on the roadway. A local fire chief witnessed the tornado lift over two structures and a grain bin with no noted damage. The tornado then touched down just east of the intersection in a mature corn field where it flattened a 100 to 150 foot circle in the corn, lifted briefly and then touched down again, causing the same type of damage before lifting again. The funnel attempted to touch down a third time but dissipated near a row of trees. Debris was still visible in the air. Maximum winds were estimated at 80 mph.

Convectively enhanced vorticity max lead to initiation of storms overnight Sunday across southern South Dakota. These initial storms grew upscale given concurrent downstream destabilization through northeast Nebraska and northwest Iowa. Widespread 80-100 mph winds developed through central/eastern Iowa as this derecho matured. Northern bookend and advection wing forcing led to some supercell structures across northern Illinois/southwest Wisconsin. Northern bookend turned northeast as it moved across Lake Michigan and tracked into western Michigan. As this occurred, attendant post convective wake low weakened as it crossed the lake. Thus the local area did not experience the 80 to 100 mph winds that N IL/E IA experienced. However the resultant slowing and breakup of the line as it moved across northwest Indiana/SW Michigan, yielded a LEWP and subsequent multiple small scale circulations developing along the line. These meso-vortices were associated with pockets of enhanced wind damage and brief tornado occurrences.