11
Jun
From the Ocean Navigator School of Seamanship weather course A comma cloud system is really nothing more than a more descriptive name for a cyclone or low-pressure system. Learning to recognize the elements of the comma cloud will help voyagers when they’re studying satellite images and weather charts. In general, a comma cloud is a deep mass of multilayered clouds that is often shaped 1ike a comma. It reflects a region of positive vorticity advection (PVA) and can vary in size from a few hundred miles (a clump of thunderstorms whose anvils combine in the shape of a comma) to…