A series of mysterious hole punch clouds

A series of mysterious hole punch clouds appeared in the sky of   Louisiana, Mississippi and Alabama on December 29, 2015

 

These fallstreak clouds punched gaping holes in the skies across the South

Collage of fallstreaks over Tuscaloosa today

These weird clouds form when water vapor is suspended in subfreezing air, but the vapor has not frozen because there is a lack of particles for it to freeze around.

A pretty hole in the clouds.

When particles are then introduced, the vapor starts to freeze and falls towards the surface, leaving a void or hole at cloud level, but streaks of cloud underneath.

 

http://strangesounds.org/2016/01/mysterious-hole-punch-clouds-louisiana-mississippi-alabama.html