Since 1986, there have been 194 tornado warnings issued in the month of November in Illinois: More than half of them, 101, were issued Sunday, according to the Chicago Weather Center.
“It appears the storm may have produced the most powerful Illinois November tornado on record outside of St. Louis (and possibly elsewhere) and may be one of the four most intense Great Lakes storms of the past five decades,” he said.
Source: http://www.chicagotribune.com/news/local/breaking/chi-tornado-disaster-area-20131118-story.html
