Bay of Bengal cyclones Mora and Maarutha in regional atmospheric modeling system

The coastal region of India is exposed to nearly 7% of tropical cyclones occurring in the world. The large basin of Bay of Bengal incites cyclones with varying intensity that is capable enough to cause huge damage to life and money. To understand the underlying mechanism behind these TCs and enhance their forecast accuracy, it is essential to simulate them precisely using different numerical models by applying appropriate micro-physics, Cumulus Convection (CC) and Planetary Boundary Layer (PBL) schemes. The present study uses the Regional Atmospheric Modeling System (RAMS) to simulate TCs Mora and Maarutha in the Bay of Bengal region and associated landfall in Northeast India and Bangladesh. The study is an approach to investigate and analyze winds, precipitation and other dynamical variables associated with the formation of these cyclones by providing initial and boundary conditions from the NCEP-FNL (Final) operational global analysis data (6 hourly temporal and 1.0° spatial resolution). The model output is further nudged towards the observational soundings which are obtained from NCAR-ADP upper air observational dataset. Along with this, an attempt has been made to obtain the optimum configuration of distribution and intensity of a precipitation field to match observations.