The “Super Outbreak” targeted a 13-state stretch of the U.S., reaching from Alabama to Michigan. According to the National Weather Service (NWS), the storm holds numerous tornado-related ...

Tornado researchers are still trying to understand why some tornado patterns are changing in the U.S., and what the future could hold. It's unclear how climate change might affect tornadoes.

A deadly severe weather outbreak spawned at least one tornado in 22 states from May 15-21. Among the hardest-hit states were Kentucky, Missouri, Oklahoma and Wisconsin.