The analysis aims at analysing the evolution of the 0°C isothermal altitude during intense rainfall events. The following steps are followed: • The rainfall events of around 100 meteorological stations measuring at hourly time step are considered. • Two meteorological sounding stations launching two weather balloons per day are considered. • The variation of the 0°C is analysed depending on the rainfall event duration. • The analysis is carried out distinguishing between winter (December-February) and summer (June-August).