http://sacramento.cbslocal.com/2011/07/06/astronomers-observe-colossal-saturn-storm/
"Such planet-wide weather disturbances are rare on Saturn, where the atmosphere is typically hazy and calm. Since 1876, astronomers have observed only five other megastorms on Saturn.
“This is a one-of-a-kind storm,” said Andrew Ingersoll, a self-described planetary weatherman at the California Institute of Technology, who was part of the discovery team."
