Easterlies update for South India coming up after 11pm.
"Another easterlies is expected to affect Tamilnadu coast from 16-Dec, Tuesday"

Present easterlies moisture is expected to travel North into central, N-central India!!.
A mid,upper-level W.D trough will do this !?

At present there's a weak mid-level W.D trough from N-central Pakistan and dropping South upto N-E Arabian sea.. http://ow.ly/i/7U292 
By evening of 12-Dec, the mid,upper level W.D trough is expected to strengthen... http://ow.ly/i/7U2g0 

This will pull the moisture from present Easterlies over South India into W,central,E-central,N-central India in next 2 days.
This W.D trough will drop a low-level circulation over N Gujarat, S-W Rajasthan in next 6hrs and will travel N-E.. http://ow.ly/i/7U2ru 
The W.D trough is expected to drift East, the low-level circulation will push upto Delhi,N-W Uttarpradesh on 14-Dec http://ow.ly/i/7U2x5 

From noon, Friday...
T showers expected to pop over N-W,W,S,central Maharastra, N,N-W,W Karnataka and into S,S-W Mahdyapradesh.
Before morning, mid-morning of Saturday ...
Showers expected to push even upto N,central Madhyapradesh and S Uttarpradesh.
Tomorrow, scattered heavy T showers expected over N-W Karnataka and Goa ... http://ow.ly/i/7U4mQ 

Weather Instagram at December 11, 2014 at 04:46PM

Chennai - 1:30pm photo. After early morning showers it was humid and no rain till now 4:45pm. #weather

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Weather Instagram at December 10, 2014 at 07:37PM

Mysore - 7:18pm, heavy thunder storm. #weather

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RT @shaan4me: Raining in Trivandrum @weatherofindia 12:26pm

RT @shaan4me: Raining in Trivandrum @weatherofindia 12:26pm

Weather Instagram at December 10, 2014 at 10:11AM

Chennai - 8:24am, Pallavaram zone, steady drizzle. Now, 10am, heavy rain over Greams road. #weather

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Weather Instagram at December 10, 2014 at 10:07AM

9:40am, heavy rain along S coast Andhra, and some pushing into Chennai city as well, Expected to spread. #weather

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Easterly wave propagation.

TMD has depicted a high pressure area of 1054 hPa and it is situated in China.

It is powerful and is generating easterly waves.

The wave crest in the ocean / land generates cyclonic circulation.

Where ever wavelets enters with clouds there it rains.[light to moderate]

The severity of cold in Indian East coast especially at WB, Odisha, MP is to be felt and formation of thick fog towards interior west.

Sometime cold wave conditions may also prevail from CAP to head Bay.

Weather Instagram at December 09, 2014 at 05:38PM

Chennai - 2:30pm, a humid day. Intermittent sharp showers possible from tonight. #weather

from Instagram