Description: Hailstorms represent one of the country’s greatest natural hazards. Existing principles for the assessment of hail risk are based on outdated datasets. Therefore, a uniform national reference on hail hazards was developed.
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Every year in Switzerland, hailstorms cause damages amounting to several million Swiss Francs; they thus represent one of the country’s greatest natural hazards. Existing principles for the assessment of hail risk are based on outdated datasets, use divergent methods, and can only be compared to one another to a limited extent. Therefore, a uniform national reference on hail hazards was developed within the framework of the NCCS priority theme “Hail Climate Switzerland”.
The following products are available: information on hail frequency , hailstone sizes , and return periods . These products refer to the period of available radar hail data from 2002 to 2020 and will be updated monthly and annually with the latest data. The hail seasons for the summer half-year from April to September are covered. In addition, hail hazard maps provide the most precise data basis available in terms of time and location for the assessment of the risk of hail damage in all regions of Switzerla