30 Aug 2023
 | 30 Aug 2023
Status: this preprint is open for discussion.

Regional analysis of convective heavy rain events in the German State of Hesse

Manuel Perschke, Britta Schmalz, and Ernesto Ruiz Rodriguez

Abstract. The convective heavy precipitation events, which occur primarily in the summer months, cannot be recorded representatively by ground-based precipitation stations due to their frequently small spatial extent, short life span and high rapidly changing intensity. The radar network of the German Weather Service, on the other hand, records area-wide, spatiotemporally highly resolved precipitation information that enables comprehensive identification of precipitation objects. In this study, a method for the identification, description and classification of convective precipitation objects considering a flood-relevant event extent is presented. Assuming an orographic independence of the events in the Central European low mountain range, the German State of Hesse is chosen as representative study area. Considering the spatial and temporal extent of the identified events, the most extreme expression is selected and independence is ensured. With the assignment of an authoritative duration for the intensive main rainfall phase, an extensive collection of heavy precipitation objects results. The results show a characteristic event length of 15 to 60 minutes; longer durations are underrepresented and exhibit inhomogeneous extreme value behavior. Statistically, the generated samples can be well represented and classified by the generalized extreme value distribution. The evaluation allows us to make a regional characterization of convective heavy precipitation.

Manuel Perschke et al.

Status: open (until 11 Oct 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-1907', Mathias Raschke, 01 Sep 2023 reply
  • RC1: 'Comment on egusphere-2023-1907', Benjamin Poschlod, 01 Sep 2023 reply
  • CC2: 'Comment on egusphere-2023-1907', Mathias Raschke, 03 Sep 2023 reply
  • RC2: 'Comment on egusphere-2023-1907', Anonymous Referee #2, 12 Sep 2023 reply

Manuel Perschke et al.

Data sets

Spatiotemporally independent heavy precipitation events for the state of Hesse (Germany) Manuel Perschke, Britta Schmalz, and Ernesto Ruiz Rodriguez

Manuel Perschke et al.


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Short summary
With climate change, an increase in extreme summer precipitation is predicted in Central Europe. The location, time and intensity of these events can only be predicted to a limited extent or at short notice, which makes preventive measures by municipalities and citizens even more important. A regional classification of the events and their most intense phases helps to develop adequate protection strategies against the negative impacts of heavy precipitation, such as flash floods.