Overall, the number of radar-derived hail days substantially increases from north to south due to the overall climate, especially the higher instability in the south. Here, the RHDs peak approximately one to two months earlier than in the north. Furthermore, most of the events in the southern regions occur on days with CAPE values in excess of
1000 J kg −1 , whereas in the north, the majority of events occur below this threshold, which may be plausibly explained by the differing annual cycle.