5, which can hurl strongly built  frame houses from foundations, flatten brick homes and severely  damage steel reinforced concrete buildings. Yet after it hit the  farm where Jo and Bill sought shelter in the shed, about one third  of the barn is still intact and standing and the house has no more  damage than several tiles torn from the roof. Also, the farm was in  the worst possible place; on the right hand side of the tornados  vortex, where the wind speeds and forward motion of the tornado  combine to cause the most damage. In reality, if a real F