Sky Hole

June 09, 2005


Provided and copyright by: Manon Boily
Summary authors & editors: Jim Foster; Manon Boily

I took the above picture of a strange looking sky near Québec City, Canada on March 19, 2005. The sky was almost entirely covered, except for this curious blue hole, which seemed to be ejecting shreds and chards of unwanted clouds -- it persisted for about 20 minutes. Actually, this "ejected" material is virga (precipitation that evaporates before reaching the surface), and the hole itself resulted from an earlier fall of ice crystals and or raindrops. Because the cloud deck was very shallow, this unusually localized precipitation essentially produced a cloud-free pore. See also the Earth Science Picture of the Day for April 8, 2005.

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