You cannot have all the data you need unfortunately to predict a chaotic system. EVEN assuming that for a point in time you have all of the data down to the the location of every quark and the energy level in every spot in space you would still not have enough data to predict the future of a chaotic system such as the weather. You would also need to know when the butterfly was going to fart in the future and if that particular butterfly in that particular location is going to be a trigger a for larger weather affect. Since you cannot know that you cannot predict the future state of a chaotic system. The butterfly fart comment is somewhat tongue in cheek - the point is very minor changes in a chaotic system can combine to create large changes in the system. In a system that is inherently in equilibrium small changes will be damped out and the system will tend to the equilibrium state, not so for a chaotic system. You should read up on chaos theory. It makes perfect sense. It may not 'square' with want you want to believe - but I have found it is best to believe what the facts show you and not to try and find facts for what you believe.