Strong winds from Southwesterly to Westerly direction, speed reaching 35-45 kmph gusting to 55 kmph occasionally likely along and off Tamil Nadu and Puducherry coasts. Sea condition is likely to be rough to very rough over south and central Bay of Bengal and Andaman sea. Fishermen are advised not to venture into sea over 1.Andaman sea : September 18th to 20th September 2. South Bay of Bengal : September 18th & 19th September 3. Central Bay of Bengal : September 18th to 20th September