i) Withdrawal of SW monsoon upto Lat. 15 deg N.

ii) Onset of persistent surface easterlies over Tamil Nadu coast.

iii) Depth of easterlies upto 850 hPa over Tamil Nadu coast.

iv) Fairly widespread rainfall over coastal Tamil Nadu, south coastal Andhra Pradesh and adjoining areas.

(v) Onset is not to be declared before 10th October even, if the conditions described above exist.