Weather is constantly changing due to an evolving climate. Meteorological trends throughout the 21st century have pointed toward more variability in severe weather, specifically for tornadoes. For example, there has not been a year without a 32-tornado day since 2001. Thus, the frequency of big tornado days (a day where at least eight events occurred) has been increasing. In addition, a 2018 study published by npj Climate and Atmospheric Sciences explicitly provides data supporting this shift in frequency from Tornado Alley to Dixie Alley. That statistical analysis determined a significant downward trend in occurrences across the central and southern Great Plains and an upward trend in portions of the Southeast, Midwest, and Northeast.
Read the full article about increased tornado patterns from the Domestic Preparedness Journal.