Reconstructed hail days for northern and southern Switzerland from 1959 to 2022

This dataset contains a reconstructed daily hailday time series for northern and southern Switzerland from 1959 to 2022, published in the following article: Wilhelm, L., Schwierz, C., Schröer, K., Taszarek, M., and Martius, O. (2024):Reconstructing hail days in Switzerland with statistical models (1959–2022),Natural Hazards and Earth System Sciences, 24, 3869–3894.https://doi.org/10.5194/nhess-24-3869-2024 The dataset was created by combining daily radar hail proxies and environmental predictor variables from ERA5 reanalysis in an ensemble statistical model for predicting past hail occurrence.Separate logistic regression and logistic generalized additive models (GAMs) are built for each domain and combined in an ensemble prediction to reconstruct the final time series. Hail days are identified from operational radar-derived probability of hail (POH) data for two study domains — north and south of the Swiss Alps — using data from 2002 to 2022 during the convective season (April–September). A day is defined as a hail day when POH surpasses 80% for a minimum footprint area of the two domains. In the daily files: 0 = no hail day, 1 = hail day In the yearly files: yearly sums of hail days Contact: [e-mail]