Normal rain expected in most TN districts

Normal Rainfall (plus-minus 10 per cent of the long term mean seasonal rainfall) is expected in majority of the districts in Tamil Nadu during the North East Monsoon from October to December.
Erode, Tirupur, Salem, Dharmapuri, Thanjavur, Tiruchirapalli, Ariyalur, Perambalur, Cuddalore, Nagapattinam, Dindigul, Virudhunagar, Theni, Sivaganga, Tuticorin, Madurai, Pudukkottai, Ramanathapuram, Tiruvallur, Kancheepuram, Vellore, Chennai Tiruvannamalai, Kanyakumari, Namakkal and Krishnagiri, may receive normal rainfall, according to an analysis by Tamil Nadu Agricultural University.
Above normal rainfall is expected in Coimbatore, Karur, Tiruvarur, Tirunelveli, Villupuram and Nilgiris districts, during the period, it said.
District level rainfall forecast for the Northeast monsoon over Tamil Nadu was developed at Agro Climate Research Centre in the University, based on Southern Oscillation Index and Sea Surface Temperature values using 'Australian Rainman International V.4.2,' a release said.

The historical rainfall data collected from the University Research Stations was used to represent the district rainfall information and in the absence of data from research station in a particular district, data from Rainman software was used, the analysis said.