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P. Wesley Tyler, Jr. captured this spooky image. What you’re looking at a hole-punch cloud:
Hole-punch clouds are miniature snowstorms that can occur in thin, subfreezing cloud layers.
The lack of fine particles, such as dust, in the clouds means water droplets have little to condense around, so they don’t turn to ice until the cloud hits about minus 38 degrees Fahrenheit (minus 36 degrees Celsius).
“Basically, the water molecules become sluggish enough at this temperature to form their own cluster of ice that produces an ice crystal spontaneously,” according to ice microphysicist Andrew Heymsfield.
Link via Super Punch
Previously: Butterfly Hole-Punch Clouds
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Photo: Colorado Uerling
Dark Roasted Blend has a neat post about all sorts of weird cloud formations. This one above is a Punch Hole Cloud:
Punch Hole Clouds may appear as a circular or oval holes in a layer of supercooled clouds; sometimes they assume a form of a perfect circle and persist for quite a long time, drifting together with the cloud layer. One explanation seems to blame the air traffic (the jet contrail intersections) combined with a thermal inversion (a circular motion of a rising warm air).
