 While Arkansas is no stranger to the tragic effects of tornadoes, the historic region known as Tornado Alley appears to be shifting. KOAF's Jack Travis spoke with Steve Piltz, the head meteorologist at the National Weather Service in Tulsa, about their efforts to track where tornadoes are happening. I think the whole term shifted sometimes brings up different connotations for different folks. It makes it sound like something is actively moving across the country and