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Rare, 'menacing' roll cloud moved across Washington D.C. metro area early this morning

Emily

Emily

Editor, Senior Moderator
Many more photos at link...

http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2013/09/16/rare-menacing-roll-cloud-moves-across-northern-virginia-pictures/?tid=pm_local_pop
Rare, menacing roll cloud moves across northern Virginia (PICTURES)

By Jason Samenow, Published: September 16 at 10:56 am
On the leading edge of a cold front gliding through the D.C. metro region this morning, a scary-looking tube-shaped cloud stretched across the skies in northern Virginia. It ended up signaling mostly benign weather, in the form of some showers that followed its passage.

This cloud type is known as a roll cloud or arcus cloud.

Resembling a giant dough roller, a roll cloud is completely detached from its parent shower or thunderstorm...
BUS0QLPCAAACKtW.jpg

Via @NWS_SFSC on Twitter
Click to expand...
 
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