Large red spots on Jupiter is a massive storm that has lasted for a couple of centuries and is twice larger than our entire planet Earth. Currently extends from 24000-40000 kilometers in east-west and 12000-14000 km in north-south. No one knows how long this storm will take but it decreases - scientists estimate that is now two times smaller than 100 years ago.
Great Red spot rising about 8 km above surrounding clouds, and is considered to be mainly form ammonia gas and ice clouds. Similarly to the red spot, white ovals are also cyclone storms. In their centers winds rise, and on the edges goes down. In 1998th scientists monitor how the two white ovals merged into the biggest storm of the solar system after the Great Red spot.
Except the Great Red Spot on Jupiter can often be seen smaller spots, whose interactions can not be predicted. An example is the event in 1998th when there has been a merging of two large spots.