Picture of the Day: Open Water Roll Cloud

TwistedSifter

 

OPEN WATER ROLL CLOUD

 

roll-cloud-off-coast-of-brazil

Photograph by Capt. Andreas M. van der Wurff via EPOD

 

This impressive (and seemingly endless) roll cloud was spotted from a ship en route from Paranagua, Brazil to Montevideo, Uruguay. The image was taken by Capt. Andreas M. van der Wurff and chosen as the Earth Science Picture of the Day for February 29, 2012.

The Captain explains:

“A cloud feature like this isn’t something you would want to run into on the open sea or on a crowded highway, but roll clouds (arcus cloud) aren’t necessarily a presage of severe weather. They most often form along the leading edge of a mature thunderstorm in the relatively cool air associated with the storm’s downdraft; however, they’re detached from the storm itself and may be seen to roll or tumble along their horizontal axis.”

 

This isn’t the first time a roll cloud…

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