Plunge pool Plunge pool A plunge pool (or plunge basin or waterfall lake) is a deep depression in a stream bed at the base of a waterfall or shut-in. It is created by the erosional forces of cascading water on the rocks at formation's base where the water impacts. The term may refer to the water occupying the depression, or the depression itself. Plunge pools are formed by the natural force of falling water, such as at a waterfall or cascade; they also result from man-made structures such as some spillway designs. Plunge pools are often very deep, generally related to the
Funnel cloud causes the rotation on a horizontal axis, which, when deflected vertically by atmospheric conditions, can become a funnel cloud. They are a common sight along the Pacific Coast of the United States, particularly in the spring or fall. On July 29, 2013, a cold-core funnel cloud touched down as an EF0 tornado in Ottawa, Canada, causing extensive damage in the form of downed trees on a golf course. No advance weather watches or warnings were issued by Environment Canada, and the tornado was spawned from one of the few non-severe storm clouds moving through the area. Funnel cloud A funnel