An interesting article from NASA states that Jupiter's southern equitorial belt (SEB) - which interacts with the Great Red Spot - has disappeared!
This is not the first time the browny gas belt has disappeared. Glenn John Rogers, director of the British Astronomical Association's Jupiter Section, says that:
"The SEB fades at irregular intervals, most recently in 1973-75, 1989-90, 1993, 2007, 2010. The 2007 fading was terminated rather early, but in the other years the SEB was almost absent, as at present."
The return of the SEB can be rather dramatic, and it's pot-luck as to who sees it first, given that it can be seen easily from earth.
See the full report from the NASA website here.