Tornadoes are cropping up farther eastward in the U.S. than ever before, according to a study published in October in the journal Climate and Atmospheric Science.

While the Midwestern region known colloquially as “tornado alley” — parts of northern Texas into Oklahoma and Kansas into Nebraska — is still No. 1 in terms of twister frequency, tornadoes are now becoming common in Mississippi, Louisiana, Kentucky and even Missouri, Illinois, Iowa and parts of Ohio and Michigan.

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