Cumulus congestus cloud
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Cumulus congestus or towering cumulus clouds are a species of cumulus that can be based in the low- to middle-height ranges. They achieve considerable vertical development in areas of deep, moist conv
Cumulus congestus clouds looming over the horizon, as seen from Wagga Wagga, NSW, Australia
Cumulus congestus over Cahokia Mounds Museum, in Collinsville, Illinois
An example of a Turkey tower in the distance
Flanking line (meteorology)
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A flanking line is an area of cumulus congestus or small cumulonimbus that mark an area of widespread updrafts on the edge of strong thunderstorms. These flanking lines generally occur in the vicinity
Structure of a flanking line. In the forefront, there are different cumulus species evolving from the cumulus mediocris to the cumulus congestus; behind, there are cumulonimbus calvus; finally, the huge cumulonimbus capillatus incus dominates the background showing a strong thunderstorm.