WSL Institute for Snow and Avalanche Research SLF

November 27, 2018

WSL Distinguished Lecture

Hail is one of the most expensive atmospheric hazards in Switzerland in terms of insured losses and damage inflicted on agriculture. Hail forms in strong and long-lived thunderstorms during the summer season. Our current understanding of hail storms in Switzerland is based mainly on radar observations. Radar-based hail products provide information on the probability of hail and the maximum expected hail size for Switzerland in real time, and these data sets extend back in time for 16 years. However until recently no systematic ground-based hail observations were available that could be used to verify the radar-based hail estimates. This has led to the implementation of a hail reporting function in the MeteoSwiss weather app in May 2015. Since then >50’000 hail reports have been submitted to the app. This information together with insurance loss data is used to analyse the radar-based hail products. In addition an automated network of 25 hail measurement stations has been set-up in summer 2018 and will be extended to 80 stations in 2019. These measurements will provide additional information on hail stone properties.

Datum: 27. November 2018, 10:30 – 11:30
Ort: Englersaal, WSL Birmensdorf (video-link to SLF Davos)
Organisatorin: Rosmarie Büchi
Referentin: Prof. Dr. Olivia Romppainen-Martius, Institute of Geography and Oeschger Centre for Climate Change Research, University of Bern, Switzerland
Moderatorin: Marielle Fraefel
Sprache: english
Zielpublikum: everybody intested in this topic