Excerpt from IMetD (Kolkata) website
Main synoptic features based on 0830 hrs IST Observations dt.06.10.2012
Under the influence of Upper-air Trough over North Bay of Bengal, a low pressure area has formed over North Bay of Bengal adjoining areas. Associated cyclonic circulation extends upto 2.1 km a.s.l.
Comment by Praful Rao
The activity in the Bay of Bengal has been unusually quiet during the monsoons of 2012 with no lows, depressions or cyclones forming.
STH monitors the activity in the Bay on the internet and reports all adverse weather activity with a view to provide early warning.
On 06Oct2012, I MetD is reporting formation of the first low pressure area of the season in the Bay of Bengal.