Severe weather is likely to roar to life by late Monday as a surge of moisture and humidity reaches into the country’s Corn Belt. The severe threat will continue into Tuesday across parts of the Plains and Midwest. Damaging winds, large hail and tornadoes are possible in cities such as Chicago, Minneapolis, Des Moines, Omaha, Milwaukee, Oklahoma City, Kansas City, Tulsa, Indianapolis and St. Louis. Here’s what you should look out for.