The structure of pre-monsoon convective systems over southern peninsular India using polarimetric doppler weather radar (DWR) observations has been analyzed. Convective-stratiform separation has been done for eleven convective events during Mar-May, 2018. The mean vertical profile of reflectivity shows peak reflectivity of 32 dBZ near 3 km height for convective regions and the bright band signature over stratiform regions was observed. The frequency distributions of reflectivity at 3 km height over convective and stratiform regions are of bell-shaped nature with peaks at 32 dBZ and 18 dBZ respectively. A comprehensive analysis has been done on two prominent convective cases on 13^th and 25^th May 2018. Strong convective regions represented by high reflectivity (> 45 dBZ) were noticed in the PPI diagrams. Specific differential phase (K_dp) has been calculated from the slope of the filtered Φ_dp. Heavy precipitation near surface is reflected in the high value of K_dp (> 5° km^-1). High values of Z_dr (> 3 dB) were measured at lower levels due to the oblate bigger raindrops. A fuzzy logic-based hydrometeor identification algorithm has been applied with five variables (Z_h, Z_dr, ρ_hv, K_dp, and T) to understand the bulk microphysical processes at different heights within convective regions. The presence of bigger graupel particles near the melting layer indicates strong updrafts within the convective core regions. The vertical ice hydrometeor might signify the existence of a strong electric field causing them to align vertically and this could be linked to lightning occurrence associated with such systems.