One misconception is that the wind associated with a tornado is confined to within the visible funnel cloud. This might be analogous to thinking of the tornado as a vacuum cleaner hose hanging out of the sky. One possibility why many people think that being under an overpass offers protection is that with something above them, the bridge will prevent the wind from going ‘up’ underneath the overpass. A description of the situation much closer to reality is presented in Slides 14 and 15.
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