From what little I've read, practical weather control would most likely consist of precision crafting of "wild" weather patterns using orbital microwave lasers. Applying heat at *just* the right time and place and in the correct amount could be used to start, stop and even steer weather patterns. Since such things aren't something that can be accomplished quickly (there's a LOT of mass involved!), I suspect that disrupting the system would likely result in a slow and unremarkable return to normal weather patterns. Of course, such a "normal" pattern might include the F5 tornados which the system would have otherwise stopped from forming.