B
Brick Tamland
Guest
A mobile home by itself will influence the nearby space very little. But a collection of mobile homes, say, a mobile home park? Well that's a different beast altogether. The differential heating caused by the rectangular inversion atop the cooler crawl space/open-air foundation signature effectively exerts a localize "bending" of the lower troposphere which, in turn, influences the angular momentum of the surrounding atmosphere enough to produce a horizontal gradient to the ambient wind field. This works in concert with the background flow to create a local instability maximum and acts as a vacuum of sorts which will tend to "draw in" nearby convection. When shear is present, storm relative helicity is augmented and rotation can more easily be achieved. The end result is that larger trailer parks influence the atmosphere in a way that is both attractive to thunderstorm activity and also conducive to tornado development. It plays no small role in the fact that so many of them are struck by tornadoes.