The regional weather office on Friday sounded a cyclone alert to parts of Tamil Nadu and Andhra Pradesh, with a deep depression over southeast Bay of Bengal now intensifiying into a cyclonic storm, christened ‘JAL’.

"JAL lay centered about 700 km east of Trincomalee (Sri Lanka), 900 km east-southeast of Chennai and 1100 km southeast of Visakhapatnam. It would intensify further into a severe cyclonic storm. The system would move west-northwestwards and cross north Tamil Nadu and south Andhra Pradesh coasts between Puducherry and Nellore close to Chennai by November 7 (Sunday) evening or night," the weather office said.

The storm will bring rain or thundershowers at most places with isolated heavy to very heavy falls over north coastal Tamil Nadu, Puducherry and south coastal Andhra Pradesh from Saturday morning, it said.

Further, gusty winds reaching around 65-75 kph would be witnessed along and off North Tamil Nadu, Puducherry and south Andhra Pradesh coast from Saturday and these may increase upto 120-140 kph at the time of landfall. Sea conditions will be very rough to high, along and off these coasts, becoming phenomenal at the time of landfall, the weather office said.

Expected damage included minor damage to power and communication lines, it said, adding, total suspension of fishing activities had been suggested with fishermen being advised against veturing into the sea. The system was under constant surveillance, they said.

Meanwhile, rainfall occurred at many places over interior Tamil Nadu and coastal parts of the state with Avinashi receiving a maximum of 14 cm rainfall.