I shot this over Mesa Arizona a couple years ago. What do you call these clouds??

[Kem Poyner]

I walked out my front door and my jaw hit the floor....I grabbed my camera and got this shot.

 

[NealRasmussen]

My guess, uneducated, would be "Perlucidus Virga from Altocumulus". But the altocumulus is simply a guess as the actual cloud part seems eaten away.

http://namesofclouds.com/types-of-clouds/perlucidus-clouds.html