The possibility to simultaneously combine both radar intensity observations over water and phase observations over land surfaces enables specific studies on the interrelation between moisture distribution and wind fields. The fine spatial resolution is particularly suitable for the study of mesoscale shallow convection in the planetary boundary layer in coastal areas or areas with large lakes to describe for example the transformation of air across the land-water interface. Although the phase delay measurements are always a summation of the delay during two acquisitions, specific patterns can often be recognized and analyzed.