Between 1916 and 1969, the busiest day of the year for tornadoes in Illinois was December 18.
In Southern Illinois, December had the fourth highest frequency of deadly tornadoes – just behind April and May.
Between 1916 and 1969, the busiest day of the year for tornadoes in Illinois was December 18.
In Southern Illinois, December had the fourth highest frequency of deadly tornadoes – just behind April and May.