Cassini snapped this picture of a monster storm on Saturn on Feb. 25, 2011. This storm started in December 2010, and has since wrapped itself all the way around the planet, spanning an area about 8 times that of the Earth's total surface. The thin dark band at the equator is Saturn's rings seen edge on, and the broader dark bands below are the shadows cast by the rings.
The image below is color coded to indicate the altitude of the various cloud layers in the storm. Blue, white, and yellow indicate clouds at higher altitudes, with green, red, and brown colors showing clouds that are deeper in this gas giant planet's atmosphere. Check the CICLOPS website for more information and Cassini images of Saturn.