Oklahoma tornadoes: National Weather Service reports continued severe weather risk for Monday - Article Photos 492/539

This tractor-trailer was crumpled after it was lifted from the interstate and dropped on US 177 about 20 feet below. A tornado caused extensive damage along I-40 at the junction with US 177 on the west side of Shawnee Sunday evening, May 19, 2013. Photo by Jim Beckel, The Oklahoman.