Union County Emergency Management Agency Deputy Director Paul Slaughter said most of the major damage in Union County during the June 13 storms occurred along state Route 739.
"An equipment barn at 26459 state Route 739 was a fairly new structure and it was 80-percent destroyed," Slaughter said.
Directly across the street, at 26586 state Route 739, a metal roof was peeled back off the office at Nature Pure egg farms.
"We had the National Weather Service come out that Friday and they determined the damage done there at state Route 739 was due to straight-line wind in a microburst," Slaughter said.
The NWS determined the winds that caused the damage on state Route 739 hit speeds between 80 and 85 mph.
The NWS describes a microburst as "a downdraft (sinking air) in a thunderstorm that is less than 2.5 miles in scale. ... Although microbursts are not as widely recognized as tornadoes, they can cause comparable, and in some cases, worse damage than some tornadoes produce."
Nature Pure LLC is a family-owned and operated egg farm. Some of the sheet metal from the office building hit some power lines but Slaughter said the power on the farm was restored the next day.
Other damage in the northern part of Union County included the end of a barn that was blown off as well as a roof of a house.
The damaged house, at 13744 state Route 739 near Richwood, was built with a flat, rubberized roof, Slaughter said.
"The wind got under the rubber and peeled it back," he said.
In other parts of northern Union County, the wind brought down trees but no one was hurt. The Union County Sheriff's Office reported receiving numerous calls between 1 and 5 a.m. June 13 about storm damage, including reports of trees that fell across roads, power lines down and barns blown over.