In this paper we present a case study regarding a desert dust intrusion over Cluj-Napoca city, observed using a LIDAR system in synergy with other instruments and models. We identified and analyzed the different dust layers present in the atmosphere at the beginning of April 2014. Besides the LIDAR system used in the identification of the dust layers we also used different models like HYSPLIT and FLEXPART in order to estimate the source of the long-range transported aerosol. We used an optical aerosol point monitor in order to measure the ground level concentration of aerosol particles. Several aerosol layers were detected at 3000-3500 m and 4000-4500 m. At ground level we measured the PM10 concentration with maximum values reaching 132 μg/m 3 .