A
convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions. This create a mass accumulation that eventually leads to a vertical movement and the formation of
clouds and
precipitation. Large scale convergence, called
synoptic scale convergence, provides weather systems such as
baroclinic troughs,
low-pressure areas, and
cyclones . Small scale convergence will give from isolated
cumulus clouds to large areas of
thunderstorms. The inverse of the convergence is the
divergence.