RT @drjagadesh: @weatherofindia It is raining now in chetpet , #chennai (4:16pm)

RT @vasuphani: Black clouds surrounded here #Pallavaram #Chennai @weatherofindia (3:55pm)

#chennai - 4:36pm, Moderate rain just lashed pallavaram zone for 15min.. now drizzling and VERY dark!

2 low level circulations seen, 1 over Orissa & Chatisgarh and another over N-W.Gujarat ... http://ow.ly/i/V93S

Circulation over Orissa is expected to track N-W into E,N-E.Madhyapradesh in next 2 days ... http://ow.ly/i/V94S

Presently the fresh UAC can be seen over S.Chatisgarh & E.Maharastra ... http://ow.ly/i/V95f

Today's UAC is also expected to track W-N-W thru N.Maharastra and reach N-W.Maharastra & E.Gujarat on 12-Sep... http://ow.ly/i/V979 

#chennai - zones North of Tiruvallur & Ponneri (N,N-W from city) are getting good rain now 3:18pm.

#chennai - 3:06pm, lots of small showers seen over zones from West to North from city at around 35 to 50km... http://ow.ly/i/V8Tm 

Offshore trough along S-W coast persists but weak ... http://ow.ly/i/V8Be

One monsoon LOW still persists along N-W Gujarat and slowly tracking into S.Pakistan... http://ow.ly/i/V8Be

Another monsoon LOW can be seen over Orissa, S,central.Chatisgarh .... http://ow.ly/i/V8Cj

The monsoon low over Orissa may push N-W into E,N-E.Madhyapradesh in another 2 days... http://ow.ly/i/V8D8 

2:03pm, A small shower lashed zones near Ponneri North of #chennai, at around 20 to 40km from city.

1pm, Fresh showers popping over central,N-E.Orissa, central,N-E.Madhyapradesh, S.Bengal and S.Gujarat .. http://ow.ly/i/V8wC

1pm, scattered rain seen ALL along S-W coast... http://ow.ly/i/V8wC

#chennai - having a Hot & Humid day so far, with low cloud formations now 1:53pm. Records 34.0°C at 1:10pm.

S.Karnataka,N,N-E.Tamilnadu, #chennai , S.Andhra to have HIGH vertical.V from 4pm.. Heavy rain forecast for these zone.. http://ow.ly/i/V8w1 

Features of South West Monsoon Withdrawal and the advance of the North East Monsoon:

This note is not a forecast nor a quantum estimate. It is just how to begin a Monsoon Watch for the NEM.
In the very initail para, we begin with the basic fact of the Monsoon origins. SWM has its origin around the Mascarene Highs off Madagascar, and the NEM has its origin round a large anticyclone over Siberia.

However, coming to the advances of these systems, the mode of setting of the 2 monsoons differ. The onset of SWM is well defined, and follows progressively Northwards.This can be monitored quite accurately on weather charts.
On the other hand the onset of the NEM is not clearly defined. In fact, in some years, there has been no clear indication between the withdrawal of the SWM in peninsula India and the onset of the NEM.

I would, on the above point, normally hesitate to actually present or believe a "normal date" for the onset of the NEM in the Southern States.
Full Article with details of NEM in Vagaries..

RT @sarakumar1: @weatherofindia cloudy in #chennai south suburbs #Kovilambakkam but no rain. Cool air blowing. http://t.co/ZsRDdrmW 3:44pm