Although dust devils can provide clues to tornado winds, U of Illinois wind engineer Frank Lombardo says tornadic behavior is still largely a mystery – and a bigger risk than researchers previously thought. He details ways wind engineers are piecing together answers, including simulations and damage surveys. Although dust devils can provide clues to tornado winds, U of Illinois wind engineer Frank Lombardo says tornadic behavior is still largely a mystery – and a bigger risk than researchers previously thought. He details ways wind engineers are piecing together answers, including simulations and damage surveys.