What effects the tornado on the earths surface?

Once a tornado touches down, very little has a major impact on it. An established tornado can pass over buildings, trees, hills, and even mountains without weakening. The tornado is more affected by the air masses within a thunderstorm.

In terms of effects the tornado has, vegetation and man made structures in the tornado's path are usually damaged or destroyed. In the most violent tornadoes of the top 0.5% or so roads and topsoil may be stripped away.