A multicell cluster storm, the most common of the four basic storm types, evolves as an organized sequence of cells in various stages of development and decay at any given time.
Glaciation refers to the transformation of cloud particles from water droplets to ice crystals.
The visual cloud appearance often changes from rock-hard to soft during the glaciation process. Doswell Another multicell storm, this time looking south in an even more strongly sheared wind field. Credits and Acknowledgments for WW2010.