Tornado Alley
It has also been asserted that there are numerous Tornado Alleys. In addition to the Texas/Oklahoma/Kansas core, such areas include the Upper Midwest, the lower Ohio Valley, the Tennessee Valley and the lower Mississippi valley. Some studies suggest that there are also smaller tornado alleys located across the United States.
Tornadoes of 2015
On April 2, upper-level southwesterly flow overspread the Ozarks and Ohio River Valley, where an Enhanced risk for severe weather was introduced by the SPC. A surface low tracked into Ontario, supporting a cold front down into southern Missouri. Throughout the afternoon hours, a shortwave trough tracked across the Central Plains, providing ample lift for the development of severe thunderstorms. Several weak tornadoes were recorded. On April 3, the Enhanced risk shifted southeast, encompassing portions of Kentucky, Tennessee, Mississippi, and Alabama. An EF2 tornado tracked north of Pomona, Missouri, in the pre-dawn hours, damaging or destroying several buildings. Several tornadoes of lesser intensity were observed farther east.