do you mean such as creating tornadoes? or more along the lines of conjuring a storm and directing it's lightning? and of course various other mixing effects.

Being that it's just cloud based, it could still be disrupted with a simple explosive, an 'incinerate' tech skill, or biotic force dispersing it, so i don't see any big OP Issues with it =D though, i expect the council races would be very iffy about him using it in any sort of enclosed spaces near sensitive electronics XD