Severe weather will focus across the High Plains into Saturday night before expanding to the Upper Midwest by later Sunday, then reload over the High Plains and Rockies and advance into the Midwest again next week. AccuWeather meteorologists warn that more storms packing tornadoes and big hail will continue to pose risks to lives and property. Areas of severe thunderstorms will shift back and forth from near the Rocky Mountains to the Mississippi River into next week. May typically brings a strong surge in severe weather across the United States. However, storm activity this past month has propelled the tally...