Weather Magic

Weather Magic (or Way of the World) is a magic that allows to manipulate weather either locally, or on a bigger scale. It makes it a generally strategic type of magic, since it is mostly composed of powerful archspells. Using it is proscribed in the Imperium, and limited to licensed users, mainly because its government dislikes modificating climate, since it tends to damage fifty things like repairing one.
Early on there was also another type of Weather Magic, that allow to create a really 'local' natural disasters (tornadoes, storms, floods) but it was later on dissolved and assimilated into associated elemental magic, today no longer treated as a part of Weather Magic.