Tag Archives: phenomenon


A Fallstreak Hole or ‘Hole Punch Cloud’ spotted last year in the skies above Victoria, Australia .Wikipedia sez:

Such holes are formed when the water temperature in the clouds is below freezing but the water has not frozen yet due to the lack of ice nucleation. When ice crystals do form it will set off a domino effect, due to the Bergeron process, causing the water droplets around the crystals to evaporate: this leaves a large, often circular, hole in the cloud.

Now for yeh.