Tornadoes happen during a thunder storm a thunder storm has Lightning, Rain, Clouds, Some small Hail, Thunder. Thunderstorms last from 5 minutes till 24 Hours Tornadoes last from 5 minutes till 3.5 Hours or More the Record for the longest lasting tornado is 3.5 Hours the tornado was called the tri state Tornado it went through Missouri, Illinois, and Indiana it was recorded on March 1925
