Killer tornado in Iowa rated EF-4 with 170 mph winds
It had a maximum width of 800 yards, which made it nearly a half-mile-wide tornado.
Father, 2 young kids among those killed by Iowa tornadoes
A family of five was visiting extended family when the tornado devastated the Winterset area.
Tornado slams Winterset, Iowa: 2 people reported dead
"I didn’t realize how big it was when I was filming it," said Michelle Misha Monroe Tunney.