Fair enough. Neptune and Uranus don’t seem to have these types of storms, so it seems that the size you are looking for is somewhere between Uranus (slightly larger than Neptune) and Saturn. Since our weather and climate models still need some tweaking, we may not get that answer for a while, but it looks like there may be a size that meets your query.

Inclination is to say ‘No’. The jet streams vary in location, sometimes greatly. On the other hand, variance is a function of the set size. Smaller environment; small changes can have large effects. And my understanding is that the jet streams are more-or-less linear flows.

I was considering a situation where fluid disturbances (hurricanes), congregate in certain parts of a large atmospheric body due to eddies and flows in the environment; perhaps low-pressure areas for disturbances to gather. The tie-in was that random bodies in the Solar System find semi-stable orbits at certain points of planetary orbits.

Perhaps nothing. But a little fun to think about.

Well you already have the very distinct bands made of dark zones and light belts. The interaction of which has produced the clearest and longest known storm in the Solar System, the Great Red Spot. The small axial tilt (just over 3 degrees) and speed of rotation (less than 10 hours) means that the bands are persistent, and there are virtually no “seasons” as we have them on Earth.

Do Earth’s jet-streams count?

A tropical cyclone on Earth lasting four months would still be impressive.

Curious if on atmospheric bodies above a certain size, there are relatively stable atmospheric ‘Lagrange Points’? Places where atmospheric disturbances (non-linear flow) would be stable?