@pleno from the article it said that this storm developed over a year and just how big it is. I could assume given a few more years to develop like it as it could be as big as the red maybe even dwarf it. If you click on the nasa link they showed picturess of the storm developing
Right now the red spot has lasted 300+ years (most likly from when it was discovered).
As I know of the atmosphere of jupiter is is one huge giant storm with miniture storms with in it.
as you can tell by this picture you can see many different storms.
@MIGUE2k7 actually no one knows if their is a land mass, several attempts of sending a satellite into jupiter have been unsucessful due to the huge gravity jupiter has. Like I mentioned earlier the red spot storm has lasted over 300 years maybe more. I highly doubt anything would get out due to that gravity, Jupiter would have to explode to maybe cause some damage.
@husker that won't happen due to the distance between us and jupiter it wouldn't make it. Well look at how tornados are created here, the same process must go into it as well. Also clips have been shown of the gas rings rotate so it would just be a matter of time before they combine into each other to form it's inner core and what not.