Dust storm is a complex process that is influenced by the interactions of atmospheric systems and is basically caused by conditions such as high wind speeds, bare soil and dry air. In recent years, the occurrence of this phenomenon in the Middle East is increasing. Continuation of more than a decade of drought in Iran and other countries in the West Asian region, along with the impact of other environmental factors, has led to a crisis of natural resources and environment in the region; As the country is currently facing serious problems such as water shortage, drought and dust. The Middle East is part of the dust belt that stretches from Africa to western and central Asia. Favorable weather conditions, along with other factors mentioned above, have caused the southern and southwestern regions of Iran to be affected by dust hotspots outside the country's geographical borders. In general, at certain times of the year, the activity of dust sources located in the areas of central Saudi Arabia, as well as the deserts of Jordan, intensifies dust in the southern regions of Iran. In this study, several severe and pervasive dust storms were investigated in which dust sources in the southern shores of the Persian Gulf were active and affected the southern half of Iran. After selecting some severe and pervasive events for each case separately, the following actions were taken. Investigation of weather code and visibility in the synoptic stations of Iran and neighboring countries; Spatial monitoring of storms with True-color images of MODIS sensor; Investigation of effective atmospheric systems and analysis of atmospheric conditions leading to dust occurrence using ERA-Interim data with horizontal resolution of 0.75 × 0.75 degrees; Implementation of HYSPLIT Lagrangian model by backward method to determine the transmission path of dust storm. The study of these dust events showed that in general, the formation of pressure gradient with changes in mean sea level pressure due to the entry of atmospheric systems or changes in surface temperature, increases wind speed near the surface, which if the ground surface is favorable causes dust emission. The wind direction determines the dust path. In addition, with the presence of weather front in the cold seasons, changes in wind velocity (speed and wind direction) provide suitable conditions for the activation of dust hotspots and ultimately cause the emission and transport of dust particles; Therefore, with the activation of dust sources in the countries located on the southern shores of the Persian Gulf, with each of these synoptic patterns, dust is emitted from these areas.