List of United States tornadoes from November to December 2009

[note 1] Collectively, the tornadoes injured nine people and wrought $20.36 million,[note 2] much of which resulted from an EF3—the strongest tornado during the two-month period—that struck Lufkin, Texas, on December 23.

With only three confirmed events in November, the month ranks as the third quietest on record since 1950.

[note 3][2] The opposite is true for December, during which 45 tornadoes touched down; at the time, this was the second highest since 2000 and the sixth highest since reliable records began.

[4] Twelve tornadoes touched down within the warning area of the National Weather Service office in Lake Charles, Louisiana—the largest such event in their jurisdiction since November 23, 2004.

[6] Both outbreaks were the result of strong extratropical cyclones that moved across the Southern United States, with tornadoes primarily developing along a cold front that extended south of the system's center or within supercells ahead of the front.