Hurricane season must have an end to it some time. But I found out tornadoes can happen way outside of tornado season. The time when most tornadoes strike "tornado season" is March through June, but tornadoes have been documented in the U.S. during every month and day of the year. Two examples of this are when a series of tornadoes hit the state of Indiana on November 22, 1992, and injured at least nine people. Another notable non-season tornado was where a tornado struck the area of McLean County, Illinois. Even though the tornado was during a winter month, it blew 20 railroad cars off their tracks, and hauled a camper over 100 yards. Winter tornadoes are just wrong, but no one can't stop them. The first Saturday of each month during tornado season, the city tests all the warning sirens, but they don't know if the sirens will work when a tornado hits outside of the season.