Chennai: The weather system over the Indian Ocean has formed a depression that is expected to intensify into a deep depression over the next 24 hours.

The Indian Meteorological Department (IMD) has issued a bulletin in this regard, which also states that the heavy rains are expected in Tamil Nadu.

The Tamil Nadu State Disaster Management Authority (TNSDMA) took to Twitter to say that the depression is located around 1,490 kilometre southeast of Chennai.

Also read: Cyclone Fani approches Tamil Nadu, state on red alert

The tweet also stated that 1,760 kilometre south-southeast of Machilipatnam in Andhra Pradesh.

 “It is very likely to intensify further into a deep depression during the next 24 hours and into a cyclonic storm during the subsequent 12 hours,” it said.

The weather system is also expected to intensify into a cyclonic storm from the evening of Saturday (April 27) with wind speeds at 80kmph.

The depression would bring rainfall to north coastal Tamil Nadu on April 30 and May 1, and over Kerala on April 29 and 30.

“Light to moderate rainfall at many places with heavy rainfall in isolated places also very likely over south coastal Andhra Pradesh on (April) 30,” the bulletin stated.

Further, heavy to very heavy rainfall is expected over isolated places in coastal Andhra Pradesh on May 1.

Also read: Yellow alert issued in Kerala’s 4 districts; houses damaged in Thiruvananthapuram

IMD issued an yellow alert in Kerala’s Idukki, Ernakulam, Malappuram and Thrissur on Thursday. IMD also predicted a heavy rainfall in the four districts on April 29. Over 100 houses were flooded and some were severely damaged In Thiruvananthapuram, due to rough sea, on Wednesday.

Heavy winds and rain lashed Ernakulam on Wednesday night. Many houses were damaged and power supply was disrupted in many parts of the district. According to sources, nearly 100 electricity poles were broken in the area.

The authorities had advised fishermen not to venture into the Indian Ocean, and the Bay of Bengal from April 25 and to avoid areas of the Bay of Bengal along and off Sri Lanka, Puducherry, Tamil Nadu and south Andhra Pradesh on April 29 and 30.