Potential for tornadoes, other severe weather in Chicago-area forecast, depending on how conditions develop later today

He said a tornado was recorded on Dec. 1 three years ago in downstate Taylorville. , Closer to Chicago, tornadoes were recorded on three December dates since 1950: LaSalle County on Dec. 3, 1955; Jasper County, Indiana, on Dec. 8, 1966; and Iroquois County on Dec. 4, 1973.