South Australian Severe Weather

sastorms.virtualave.net

An isolated thunderstorm crosses Port Phillip Bay Victoria. A heavy rainshaft is seen below the cloud base. When photographed with the sun eclipsed by the cumulonimbus, magnificent detail can be seen, including precipitation falling from the anvil at left. This storm is a rather small multicell with new growth occurring on the other side out of sight. The anvil is carried forward by stronger winds in the upper levels and this is known as speed shear.  As is often the case, cloud of the cumuliform type can co-exist with cloud of the stratiform species which can be seen around and ahead of the rainshaft. The existence of stratiform and cumuliform together in an unstable atmospheric profile attempts to baffle our understanding of the atmospheric process and allows us to ask the never ending question....Why......

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