List of United States tornadoes from November to December 2011
This is a list of all tornadoes that were confirmed by local offices of the National Weather Service in the United States in November and December 2011. Based on the 1991–2010 averaging period, 58 tornadoes occur across the United States throughout November, while 24 more occur in December.
Source: Wikipedia — List of United States tornadoes from November to December 2011 (CC BY-SA 4.0)