We just learned that the F0 Tornado on the Fujita Scale is light damage to trees and buildings.
The next level of damage is an F1 Tornado - Moderate damage.
This is when roofs can be peeled off of houses, mobile homes are overturned, cars are pushed off of roads, and some garages can be destroyed.
(from: wikipedia - fujita scale)
Kid Facts - Blast from the past: Cirrostratus Cloud