The development and evolution of convective systems triggered by the complex orography of the Alps was one of the issues to be investigated during the field campaign VERTIKATOR (Vertical Exchange and Orography) in Summer 2002. In this presentation the 9 July 2002 is exemplary chosen to study the processes which occur during the alpine pumping phenomena. The research bases on the temporal and spatial measurements of microphysical and dynamical parameters achieved by the FALCON aircraft equipped with the DLR WIND-LIDAR system, a monostatic C-band Doppler radar system, and the polarimetric Doppler radar POLDIRAD equipped with three bistatic receivers. This presentation focuses on the dynamical structures likely necessary to trigger convection over the complex orography of the Alpine foreland and on the wind-vector fields which were observed in- and outside of the convective system itself. Microphysical parameters inside are also derived using polarimetric measurements.