#WxGeekSpeak: Mesoscale Convective System

Every week, the blog introduces you to a technical term from the American Meteorology Society’s “Glossary of Meteorology”. Welcome to #WxGeekSpeak!

Long name, stormy results. Play the video above to find out what a Mesoscale Convective System is and how it relates to the Arizona Monsoon.

Full definition of mesoscale convective system: (Abbreviated MCS.) A cloud system that occurs in connection with an ensemble of thunderstorms and produces a contiguous precipitation area on the order of 100 km or more in horizontal scale in at least one direction.

An MCS exhibits deep, moist convective overturning contiguous with or embedded within a mesoscale vertical circulation that is at least partially driven by the convective overturning.

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