Definitions for "Mesoscale Convective System"
A small, long-lived cloud cluster, typically a few hundred kilometres in diameter.
A term often used to describe a cluster of thunderstorms that does not meet the size, duration, or shape criteria of an MCC. It is a complex of thunderstorms, which may be round-shaped or in line, and normally persists for several hours or more.
Precipitation systems 20 to 500 km (11 to 270 n mi) wide that contain deep convection. Examples in mid-latitudes are large isolated thunderstorm complexes, squall lines, Mesoscale Convective Complexes (MCCs), and rainbands.