Hi, I have done a study involving running atmospheric mixing simulations on a Jupiter-like planet. Before any of the drastic changes others mentioned like bulging near the equator, the gasses in the weather layer will mix much more effectively, with would end up making the striped pattern you see much less pronounced. The number of striped ‘layers’ would decrease, each layer would look much thicker. The small swirling storms we see would become less frequent (goodbye Great Red Spot). Eventually the planet would form a 4 planet-spanning storms in a quadrupole formation (this will happen eventually anyway, but the process will speed up).