Its RPM causes the planet to bulge at the middle and to flatten out at the tips. From earth all that can be observed is the top layer of clouds on the planet. We cannot find out any information about the conditions below the clouds. Through telescopes we can observe belts and zones. A belt is a dark line that circles the planet.
Zones are light colored areas found within the zones.
The belts slowly change year, after year, after year. The large red mark found on the surface of Jupiter is called the great red spot. The spot is around 25,000 miles long. Around 3 times the diameter of the Earth. The atmospheres pressure on jupiter has not been measured yet.