Tornado outbreak sequence of March 9–13, 2006

The Tornado outbreak sequence of March 9–13, 2006 was an early season and long lasting tornado outbreak sequence in the central United States that started on the morning of March 9 and continued for over four days until the evening of March 13. The outbreak produced 99 confirmed tornadoes, which killed a total of 10 people. The Storm Prediction Center (SPC) issued multiple elevated outlook throughout the sequence, including a rare high risk for March 12, which would end up being the most intense day of the outbreak, producing 62 in total. 11 F3 tornadoes were tallied, and a violent F4 tornado touched down in Monroe County, Missouri, becoming the strongest of the outbreak. Multiple tornado emergencies were issued for tornadoes throughout the outbreak as well. An intense F3 tornado that affected the towns of Renick and Maddison in Missouri killed 4 people and injured dozens others, becoming the deadliest of the sequence. Multiple of the tornadoes were long-tracked in nature, with 6 of them having paths exceeding 30 miles (48 km). One particular supercell thunderstorm during the outbreak persisted for many hours and progressed in excess of 800 miles (1,300 km) through Oklahoma, Kansas, Missouri, Illinois, Indiana, and extreme southern Michigan.

The onslaught of supercells responsible for the sequence also produced hundreds of damaging wind gust and hail accompanied the storms. These additional elements caused millions in damage and multiple injuries, in addition to two fatalities which were as a result of a weather-related automobile accident and a fire started by lightning. In addition to the tornadic fatalities, this sequence was responsible for 182 tornadic injuries, most of them concentrating in Missouri and Illinois, the hardest hit states by the outbreak. The total damage by the severe weather caused by this outbreak was in excess of $1 billion.