Smooth, very low cloud sheets with warm tops called Stratus unless reaching the ground in which case they are Fog.
Mesoscale areas of cloud dissolution within frontal cloud bands driven by sinking cold air on the anticyclonic side of a jet streak.
Enhanced Cumulus areas (ECs) consist of a cluster of thicker and larger cloud cells within the usual cold air cloudiness behind frontal cloud bands.
Cloud bands or lines which form within a deformation field and stretch or dissolve under the influence of elongation.
Rather narrow dark stripes in WV images, representing dry sinking air along the cyclonic side of a jet stream.
A preferred area for the initial development of deep convection is the maximum of warm air in the warm sector in front of Cold Fronts.
PV anomalies (stratospheric values of PV low down in the troposphere) are preferred areas for the development of Cbs and Mesoscale Convective Systems.
Unstructured cloud fields developing in areas of pronounced convergence.
