3 different versions of 3 different cloud sprites.

A regular version, a dark and stormy looking version, and one that is meant to be flashed behind the stormy ones for a lightning effect.

9 total images. 

Low resolution but you can't really notice it, plus upscaling it won't lose much quality since the edges are already blurred.

Remember to link back to either http://pancakebobapps.wixsite.com/apps or http://opengameart.org/users/rrcaseyr in your credits section.