Jupiter has the most sizeable planetary atmosphere in the solar system, spanning over 5,000 km (3,000mi) in altitude. Due to the fact that Jupiter has no surface, the base of its atmosphere is typically considered the point at which atmospheric pressure is equal to 100 k Pa (1.0 bar). One bar is 14.5psi. It has been estimated to be between 50 to 100 million times the pressure of earth's atmosphere at sea level. Jupiter's atmosphere is the most voluminous in the solar system.
Molecular hydrogen and helium make -up most of it's it’s atmosphere as well as amounts of ammonia, methane, hydrogen, sulfide, and water. Jupiter's atmosphere is quite impressive. There are cyclones, anticyclones, storms and lightning storms are seen from the earth.