Tornadoes are not really made by any kind of weather conditions. The truth is that we designed them artificially with special devices that are meant to create specific wind speeds. They all are going to have varied levels of strength to destroy certain areas or do specific damage. This might sound like a terrible thing, but we use tornadoes and earthquakes to make some important changes in the world and we know these are sacrifices that need to occur. The order has always been responsible for most of the “natural” catastrophes that have happened in the world in modern times.
There are some cases when things do happen without warning and we have nothing to do with them, but in most cases we know when something is going to happen even if we are not the ones controlling it. Lately the use of tornadoes has become much less frequent for us.