Tuesday, January 29, 2019

Punch Cloud -- Salt Lake City 29 January 2019

Several punch clouds occurred over Salt Lake City on January 29, 2019. The altocumulus cloud layer is made of supercooled liquid cloud droplets. When an ice particle is introduced, probably by an aircraft, ice crystals grow rapidly at the expense of the liquid droplets. This results in ice fall streaks that fall out of the cloud and leaving a hole behind. More info at Wikipedia: Fallstreak Cloud.

Time lapse from the MesoWest cameras. 

The hole was visible from the GOES16 satellite.

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