Breadcrumb Home Smoke from wildfires could intensify tornadoes Wednesday, February 11, 2015 UI College of Nursing website http://www.popsci.com/study-2011-storm-finds-smoke-could-intensify-tornadoes A new University of Iowa study published in Geophysical Research Letters found that the intensity of the April 27, 2011, tornadoes was likely kicked up a notch by smoke.