Shelf clouds form when a solid line of storms approaches an area. In these clips, a variety of shelf clouds churn across the horizon in an awe-inspiring display of natural power.
A squall line is a meteorological term for when a group of storms forms a line as they move through the area. Usually, this squall line is indicated by a shelf cloud, an impressive sight that speeds across the horizon as the storms themselves approach.
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Some of these shelf clouds can rotate, which then leads to tornados. Whether it is rotating or not, a shelf cloud is an indication that strong storms are moving through the area and a sign that you need to take shelter immediately or risk harm.
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