1.1.2.2. Initiation of convection – how thunderstorms start (daytime heating, fronts, etc)

  • 8 months ago
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  • Author: SW101

Convergence of surface winds may also lead to initiation of convection. The air in the convergence zone is forced upwards. The convergence zone also acts as a frontal boundary if two airmasses are of significantly different temperatures and/or humidities. Additionally, convergence zones are typically areas of strong moisture pooling; increased moisture increases convective instability, lowering the lifted condensation level and consequently also the level of free convection.