What Is Flanking Line?
A row of growing cumulus towers stepping up toward the main part of a thunderstorm, usually on its southwest side. In technical terms: A line of cumuliform clouds of increasing height extending from the main updraft of a cumulonimbus, typically along the rear-flank gust front on the south or southwest flank of a supercell, marking new updraft growth.
Flanking Line In Plain English
A row of growing cumulus towers stepping up toward the main part of a thunderstorm, usually on its southwest side.
The Technical Definition
A line of cumuliform clouds of increasing height extending from the main updraft of a cumulonimbus, typically along the rear-flank gust front on the south or southwest flank of a supercell, marking new updraft growth.
