改良藤田スケール
The following is a list of 2009 Minnesota tornadoes. Minnesota is a state located in the North Central United States along the northern edge of Tornado Alley, and on average receives 24 tornadoes per year. 2009 was an average year historically, with 24 confirmed tornado touchdowns. Twenty-two of the tornadoes (91%) were considered "minor", rated EF0 or EF1 on the Enhanced Fujita scale. The remaining two tornadoes were rated as "significant", at EF2.