Last sunday (28-oct-2007) we had a depression crossed and vanished within 24 hrs.
Yesterday (4-Nov-2007) also we had a LOW pressure system crossed tamilnadu and vanished within 24 hrs.
Take a look at the satellite pic and see it for yourself.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFwuefUqYo_4eY5lnNK_m2ofM9Pmh36gI0Ys5qIkavwFhSfvTlEhKvbw6F9kifrBPkJYKyIv7XUgfhRXQ__cyukWruTWO8ftJTqvrUZI3CQ2JgJky-oFDQqPZD51qp-vpgIqcI-A/s400/5-Nov-07_A.jpg)
Yet, there was heavy showers for SOME parts of chennai. City recording around 40 MM of rain. More widespread showers over most parts of Tamilnadu.
In southern India as a whole, light wind flow will favor hit-or-miss thunderstorms over the next few days and not the focused east-coast rains of the North East Monsoon.