Airplanes Punch Holes in Clouds, Make it Rain

#Travel

Sat, Jun 19th, 2010 20:00 by capnasty NEWS

If you've ever been lucky enough to see a hole-punch cloud form in the afternoon sky, you'd be forgiven for thinking a UFO landed somewhere near by. But according to a new study, the clouds form when much more pedestrian flying objects -- turboprop and jet airplanes -- fly through and change water droplets into ice crystals. When the right conditions are met, these crystals can fall to Earth, either as snow or rain -- sometimes a fair amount of it.

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