PICTURES: Mammatus, Lenticular & Other Extreme Clouds
"Mammatus Clouds, or "breast-clouds", are fascinating formations in the sky, made mostly from the cumulus cloud base. Although they are not a sure sign that a tornado is about to form, they often accompany tornado-producing storms, or even may be direct byproduct of tornado activity..."
read more | digg story
read more | digg story
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