December 1
- 2006 – A small tornado outbreak hit Pennsylvania, mostly in the eastern part of the state. An F1 tornado killed one person near Halifax when a tree fell on the victim's car. An F2 tornado hit Fairview Heights, Mountain Top, and Dorrance Township. Five people were injured when the windows of a grocery store were blown out.
- 2018 – A tornado outbreak struck Missouri and Illinois with a handful of weak tornadoes elsewhere. An EF3 tornado caused extensive damage in Hewittsville and Taylorville, Illinois, destroying 28 homes and injuring 22 people. Damage totaled $118.9 million. An EF1 tornado killed one person in a hotel on the south side of Aurora, Missouri.