sentences:  The disturbance initially lacked a distinct low-level circulation; instead it consisted of strong divergence along the western end of a surface trough of low pressure.A favorable upper-level environment allowed convection to improve, and by late on June 1, the system developed to the extent that the India Meteorological Department (IMD) classified it as a depression.It tracked westward along the southwestern periphery of a mid-level ridge over southern India.