This amazing picture shows a rare phenomenon called a roll cloud which tend to form ahead of a cold front and can stretch for miles.

Photographer Daniela Eberl took this snap at Las Olas Beach in Maldonado, Uruguay. Photo: NATIONAL NEWS
They are most common when an advancing storm front causes moist air to rise, then cool to the point where it becomes a cloud known as the dew point.
When this happens along a front, a roll cloud can form, often with air actually circulating along the horizontal axis of the cloud.

Thats one cool pic !

The world is full of strange beauty
and one has to love it when someone manages to snap a pic of it !
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