BOB 02/2012/08 Dated: 30.10.2012Time of issue: 0330 hours ISTSub: Deep Depression over southwest Bay of Bengal: Cyclone Alert for North Tamil Nadu, Puducherry and adjoining South Andhra Pradesh coastsThe deep depression over southwest Bay of Bengal moved westwards, and lay centred at 1800 UTC of yesterday, the 29thOctober 2012 over southwest Bay of Bengal near latitude 9.00N and longitude 82.00E, about 500 km south-southeast of Chennai and 100 km east-northeast of Trincomalee (Sri Lanka). The system would intensify further into a cyclonic storm and move westwards for some more time and come very close to Sri Lanka coast and then move northwestwards and cross north Tamil Nadu and adjoining south Andhra Pradesh coast between Nagapattinam and Nellore by 31stOctober, 2012 afternoon.Based on latest analysis with NWP models and other conventional techniques, estimated track and intensity of the system are given in the table below:
Under the influence of this system, rainfall at most places with isolated heavy to very heavy rainfall would occur over coastal Tamil Nadu and Puducherry from tonight onwards. The intensity of rainfall would increase from 30thth October 2012 evening, with scattered heavy to very heavy rainfall and isolated extremely heavy rainfall (25 cm or more).
Squally winds speed reaching 45-55 kmph gusting to 65 kmph would prevail along and off north Tamil Nadu, Puducherry and adjoining south Andhra Pradesh coasts during next 12 hours. The wind speed would gradually increase thereafter as the system comes closer to coast. Sea condition will be very rough to high along and off north Tamil Nadu, Puducherry and adjoining south Andhra Pradesh coasts during next 48 hours. Fishermen along north Tamil Nadu, Puducherry and adjoining south Andhra Pradesh coasts are advised not to venture into the sea.The system is under constant surveillance and the concerned state Governments are been alerted.The next bulletin will be issued at 0830 hrs IST of 30thth October, 2012