A tornado watch is in effect across the Midwest, alerting millions as severe weather, including wind and hail, continues from a system that moved in over the weekend. Key areas at risk include northern Iowa, eastern Minnesota, and western Wisconsin, where strong tornadoes, large hail, and destructive winds are expected. The threat extends to parts of Missouri, Nebraska, Kansas, Texas, and Oklahoma, with an enhanced risk of severe storms continuing into Tuesday, particularly over northern Texas and central Oklahoma, raising concerns for flash flooding.