News Tornado Alley ‘about to wake up’: Wall of storms threaten 18 states May 16, 2019May 16, 2019John Bacon and Doyle Rice, USA TODAYComments Off on Tornado Alley ‘about to wake up’: Wall of storms threaten 18 states Severe thunderstorms and tornadoes will threaten almost 1 million square miles of 18 states in coming days as tumultuous spring weather sweeps the nation.