Friday, May 5, 2017

A Fallstreak Hole

Sources: Google
A Fallstreak Hole is a large, oval gap that appears in Cirrocumulous clouds (high altitude clouds) or Altocumulous clouds (low altitude clouds). This hole, also known as Cavum literally appears as a punch hole in clouds. When the temperature of clouds is below freezing point but the water is not frozen due to lack of ice nucleus (Ice nucleus means the particle which plays the role of a nucleus and helps in the formation of ice crystals), such holes or gaps within the clouds form.

So due to the lack of ice nucleus the ice crystals that are formed set off chain reactions which cause the water droplets to evaporate around the crystals, thus leaving a large gap (circular or oval) in the cloud.

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