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A universe of beauty, mystery and wonder
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Thursday, October 1, 2015

BIZARRE CLOUD FORMATION KNOWN AS "SKYPUNCH" OR "FALLSTREAK HOLE" OBSERVED IN ONTARIO

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Thursday, October 1, 2015, 3:13 PM - On Thursday afternoon, social media lit up with reports of a strange 'hole' in the sky over southwestern Ontario.   The cloud -- called a 'skypunch' or a fallstreak hole -- could be seen over several communities, including Woodstock, parts of Brantford and London.
 
Read more and see more images


"While they can be found worldwide, a skypunch is rather rare and the phenomenon is hard to explain," says Weather Network meteorologist Erin Wenckstern.
 
"High up in the sky, thin clouds made from supercooled liquid water -- meaning temperatures are below freezing, but cannot freeze in crystals -- are disturbed as an aircraft punches through and cools the surrounding air, eventually forming ice crystals due to a drop in pressure. The ice crystals then cause the surrounding water droplets to evaporate, leaving a distinctive hole in the sky." 
 
According to witness Chris Vanderheyden, Thursday's cloud formed around 1:15 p.m., over Woodstock, Ont., slowly dissipating over a 30-minute period.

Source
http://www.theweathernetwork.com/news/articles/skypunch-makes-an-appearance-over-southwestern-ontario/58016/


RELATED

Fallstreak holes occur when a portion of a cloud with super-cooled water droplets freezes and creates ice crystals
Fallstreak holes occur when a portion of a cloud with super-cooled water droplets freezes and creates ice crystals

More pictures of awesome clouds on this blog
 
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