The distinction of environments conducive to different types of severe weather across Central Europe
For each severe weather type, we evaluated which parameters differentiate best between the intensity categories using non-parametric statistical tests, namely Mann-Whitney U-test and Kruskal-Wallis test. We evaluated whether and how well the parameters / indices differentiate between the intensity categories of individual severe weather threats.
We found that for hail severity discrimination, buoyancy related parameters attained the best scores, whereas wind profile-related parameters performed better for severe wind events. However, for both of them, the combination of CAPE and Deep Layer Shear (bulk 0-6 km shear) performed even better. This was different for excessive precipitation for which low-level moisture and the depth of the warm cloud layer were the best predictors. In case of tornadoes, the vertical wind profile is more relevant than paramaters related to buoyancy.