EF1 tornado in Rush County, Indiana

This fourth of five central Indiana tornadoes tracked to the east-northeast, from northeast of the intersection with South Prill Road and South Degelow Road to south-southwest of the intersection of South Prill Road and County Road 740 West. Despite tracking for only 850 feet, the circulation was strong enough to completely destroy a metal barn; although grain silos immediately west and a nearby home to the northwest were both untouched. The barn had rusted connections between the toe nail of frame and foundation. The barn's debris were thrown to the northeast, north and northwest before the tornado quickly dissipated in a field to the east. Peak winds were 110 mph.

At times robust south-southwesterly breezes brought unseasonably high dewpoints in the upper 60s and temperatures around 80 degrees, which led a favorable set-up for severe thunderstorms that also included high low-level helicity, and a 40-knot low-level jet stream ahead of an approaching cold front, all under adequate divergence aloft from the right exit region of a cyclonically curved jet streak.

Numerous rotating thunderstorms resulted through late day and evening hours, which produced widespread marginally severe hail across ten counties along and to the east-southeast of the Interstate 70 corridor, with strongest cells producing 1.50-1.75 inch hail and/or widely scattered wind damage from Clay County to Decatur County, as well as five weak tornadoes within Shelby, Rush and Decatur Counties. The tornadoes caused mainly tree damage and some minor structural damage. Several supercells actually tracked over the same areas where tornadoes occurred, which made video footage a key part of proper event verification. Some of the tornadoes may have actually had longer track lengths, but this could not be deciphered given the broad open farm fields. Witness reports indicated that some of the tornadoes were small, rope tornadoes that bounced across the landscape.

Less intense thunderstorms north of the Interstate 70 corridor produced small hail over a few zones, as well as a funnel cloud in Tipton County before an early evening cell downed a few trees in eastern Randolph County.