Articles | Volume 1, issue 2
Weather Clim. Dynam., 1, 325–348, 2020
https://doi.org/10.5194/wcd-1-325-2020
Weather Clim. Dynam., 1, 325–348, 2020
https://doi.org/10.5194/wcd-1-325-2020

Research article 17 Jul 2020

Research article | 17 Jul 2020

The role of large-scale dynamics in an exceptional sequence of severe thunderstorms in Europe May–June 2018

Susanna Mohr et al.

Video supplement

Video supplement: Animated 2D radar reflectivity of the German Weather Service (DWD) for 27 May 2018 S. Mohr https://doi.org/10.5445/IR/1000118571

Video supplement: Animated 2D radar reflectivity of the German Weather Service (DWD) for 31 May 2018 S. Mohr https://doi.org/10.5445/IR/1000118574

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Short summary
We investigated an exceptional thunderstorm episode in 2018, in which atmospheric blocking provided large-scale environmental conditions favouring convection. Furthermore, blocking was accompanied by a high cut-off frequency on its upstream side, which together with filaments of high PV provided the mesoscale setting for deep moist convection. The exceptional persistence of low stability combined with weak wind speed in the mid-troposphere over more than 3 weeks has never been observed before.