Panchkula, Oct. 19 -- Isolated heavy to very heavy rainfall is likely over Tamil Nadu, Puducherry and Karaikal during October 19-21, while the northern plains, including Punjab, Haryana, Delhi, Uttar Pradesh and Rajasthan, are expected to remain dry through October 25, the India Meteorological Department (IMD) said on Monday.

A well-marked low-pressure area over the southwest Arabian Sea is also likely to intensify into a depression within 24 hours, the department said in its morning bulletin issued at 8.16 am.

The system is expected to move east-northeastwards initially before gradually recurving northwestwards towards the Somalia coast over the next two to three days.

Across southern India, isolated heavy rainfall is forecast over Kera...