John Whitaker, left, looks on as Jean Van Hise and Mary Kay Merema hug outside his destroyed home in the Cherry Hill subdivision outside of Flagg Center, Ill., on Friday, April 10, 2015. The National Weather Service says at least two tornadoes churned through six north-central Illinois counties.

Closer look at Illinois tornado

Patrick Powell takes a look at the strength and distance traveled of the EF-4 tornado in northern Illinois