Mammatus clouds at Harmony Park in Geneva, Minnesota during Project Earth, 2010 right before we got slammed by serious thunderstorms
heaven-ly-mind: ~ Flying home ~
Mammatus clouds over Nebraska. How crazy amazing are these!?
Crazy Clouds /
✯ Cool Clouds - Palm Springs, CA
A unique type of storm cloud could become the first new variety of cloud to be officially identified in more than half a century.
Crazy Clouds: Understanding Unusual Sky Formations Awesome!
Over central Texas April 26, 2011