Another weird cloud phenomenom

[wukunlin]

someone took video of this thing over Tainan in Taiwan, is there any known natural explanation to ummm, holes in the sky?

_jEBrT-roJU

[Evo]

This is an easy one.

http://news.nationalgeographic.com/news/2011/06/110630-hole-punch-clouds-airplanes-heat-ice-science/

http://en.wikipedia.org/wiki/Fallstreak_hole

[wukunlin]

Oh, easy one indeed, thanks Evo :biggrin: