Enhanced Cumulus (EC) areas consist of clusters of convective cells which are thicker and mostly larger than the surrounding cloud cells. As such they are a special form of Cumulonimbus (Cb) Clusters. Clusters of convective clouds can be found in any unstable environment where dynamical forcing in the atmosphere plays a role as an additional triggering effect: e.g. in warm air ahead of a polar front (see
Cumulonimbus Clusters
), within the frontal zone of a polar front (see
Front Intensification by Jet Crossing
) and in the cold air mass behind a Cold Front. EC configurations are usually found in the cold air behind fronts.