DFL - Event Week 2014

30 Minutes

Georg Pistotnik, ZAMG

Convection and Severe Weather

Published: 24 June 2015

Next to sufficient instability, strong vertical wind shear is the main driver that promotes thunderstorms to organize into multicells, supercells or lines, which are more probable to attain a longer lifetime and to produce severe weather phenomena like hail or wind gusts. The role of vertical wind shear in storm organization is explained in this presentation, and selected case studies illustrate how favorable conditions for severe storms can evolve either by large-scale processes or, more challenging for forecasters, by local modifications of the wind systems and associated temperature and humidity changes.

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Filed under Keywords:

multicell storms, supercells, convection, life cycle, organization