Nothing apocalyptic.
http://www.meteorologynews.com/2009/10/12/hole-punch-cloud-not-ufo-spotted-over-moscow/
Probably not but there doesn't seem to be any viable explanation how these "holes" or donuts form. Gotta wonder if there isn't something hitting our atmosphere, maybe from outside our solar system even. I don't guess we even know for sure our very own benevolent sun couldn't somehow be shooting directed particles of some kind at us occasionally. Truly interesting phenomenon in any case.