on the evening of april 25, dangerous supercells started forming across arkansas, northeast texas, and southeast oklahoma. the supercells then merged into a massive squall line of severe thunderstorms. the severe thunderstorms produced tornadoes. then, heavy rain formed northwest of the line of severe thunderstorms and tornadoes. an ef2 tornado struck vilonia, arkansas, and an ef3 tornado struck hot springs village, arkansas. later, the severe thunderstorms and tornadoes moved into tennessee and mississippi.