Land-falling tropical cyclones (TCs) are one of the most devastating weather phenomena in the nature.Disaster due to TCs can be reduced by providing more accurate prediction of the track, landfall and intensity of the storm.The forecast skill of a mesoscale model depends on the appropriate representation of the physical processes in the model.In this study, the sensitivity of cumulus convection and PBL parameterization. schemes on mesoscale simulation of land-falling Bay of Bengal (BOB) cyclones is investigated.Thirty numerical simulations are conducted for each of the two severe cyclones with double nested domain with horizontal resolutions at 27 Km and 9 Km with combination of six cumulus convection and five PBL parameterization. schemes.The initial and boundary conditions for the model are derived from the NCEP Final analysis.