Differences between lowlands and highlands in terms of compound wind-precipitation events

Extreme precipitation events are associated with cyclones, atmospheric fronts or convective storms which produce high winds as well. This fact increases the probability of compound wind-precipitation events. Such events can cause even more damage than single precipitation and wind events because, for example, soil moisture makes trees less stable. The joint effect is even more significant in case of solid precipitation due to snow accumulations on trees. However, as the orographic precipitation enhancement increases mainly cold-season precipitation totals in highlands, the altitude makes the difference in the seasonal distribution of precipitation in Czechia. Thus, the local lowlands and highlands also partly differ in terms of the frequency of compound wind-precipitation events. We present this fact on data series of maximum daily wind gusts, daily precipitation totals and inter-diurnal increases in show depth from the period 1961 – 2020 at selected Czech weather stations, located in various altitudes. Extreme events are defined by the method of percentiles; frequencies of compound events are evaluated in comparison to the stochastic frequencies.