 The basin is subdivided between the Bay of Bengal and the Arabian Sea on the east and west coasts of India, respectively.Storms were tracked by the India Meteorological Department (IMD), which is the basin's Regional Specialized Meteorological Center, as well as the American-based Joint Typhoon Warning Center (JTWC) on an unofficial basis.Tropical activity was largely affected by the monsoon trough, which spawned the three deep depressions in May, as well as the two strongest cyclones in November.