New Delhi, Dec. 3 -- The India Meteorological Department (IMD) on Wednesday evening issued a weather warning, predicting isolated heavy to very heavy rainfall over north coastal Tamil Nadu, Kerala, coastal Andhra Pradesh, Yanam and Rayalaseema on 3 December.

The alert follows a week of persistent rainfall across the region. On Wednesday, the weather system - which had previously weakened from a depression into a well-marked low-pressure area - continued to track southwestward across north coastal Tamil Nadu and Puducherry.

"The depression (remnant of cyclonic storm Ditwah) over southwest Bay of Bengal and adjoining north Tamil Nadu-Puducherry coasts moved slowly southwestwards and weakened into a well-marked low-pressure area over north...