What kind of phenomenon is cloud hole?

On Russian language the English term "fallstreak hole" can be translated as "a break-through clouds" or "maroobra band of falling rain". Someone at the sight of this phenomenon immediately imagines an alien invasion, some consider him the harbinger of a tornado or track from entered the atmosphere of a meteorite. In fact, it's much easier and harmless.

Arise cloud hole, when something disturbs the peace of cirrocumulus or altocumulus clouds, in which the water is in a supercooled state (i.e. at temperatures below the freezing point, but it lacks condensation nuclei). This state of water is unsustainable. Due to the chain reaction caused by, for example, flown through such clouds by aircraft, the water in them kristallizuetsya, falls down and leaves behind an almost perfect shape of a hole.

In short, a sleight of hand and no deception. But what an incredible effect!

Translated by «Yandex.Translator»