This is a very interesting photo of a roll cloud. It was shot above the Las Olas Beach in Maldonado, Uruguay. The photo was taken on January 2009. The roll clouds are rare clouds that appear very long in the sky. The clods form near advancing cold fronts. The roll cloud actually has the ability to have a circulation of air along the long horizontal axis of the cloud. The roll cloud is truly formed when a downdraft from a occurring storm causes the moist air that is warm to rise, and cool below its dew point to form this awesome spectacle. This photo had my double taking a couple times. It almost appears that these roll clouds can make people fear of a tornado occurring. However, it is reported that tornados do not form from these clouds at all. All in all I hope that I have the ability to see one of these rare roll clouds across the sky, it was surly amazing to see in a photo; it will be more awesome to see in person.
http://apod.nasa.gov/apod/image/1001/rollcloud_eberl_big.jpg
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