The well-marked low-pressure area over south-east Arabian Sea has prevailed in a battle of wits with a counterpart system over the Bay of Bengal, having concentrated into a depression, India Meteorological Department (IMD) said this (Wednesday) morning. The depression lay at about 630 km west-southwest of Aminidivi (Lakshadweep) and 1,020 km south-west of Panjim (Goa), an IMD updated issued at 5.30 am said. Short-to-medium outlook of the IMD too indicates scope for its calibrated strengthening on a track parallel to West Coast. The other well-marked ‘low’ over south-west Bay of Bengal off north Sri Lanka coast moved northwestwards and currently lay off Tamil Nadu coast. Thereafter, it may move across north Tamil Nadu, Puducherry and south Andhra Pradesh coasts by midmorning of tomorrow (Thursday).