Easterlies has reached Tamilnadu coast ... showers will pick strength as the day progresses... http://ow.ly/i/7Xdwy 

Chennai - 11:34am, scattered Drizzles so far. And now moderate/light scattered showers forecast before Wednesday morning.
Reason? coming up!
As of now, moderate rain seen from Marakkanam (100km South from chennai) to  Cuddalore zone only.. http://ow.ly/i/7XdD7 

In the North, the upper level W.D trough has weakened and now over East India... giving way to an anti-cyclone over N-W,central India.
This anti-cyclone has started to drive DRY winds from N-W India to N,N-W Bay and eventually to S-E coast India.. (cont.)
.. this will make N-W,N,central,E-central India COLD
and
Dry up easterlies moisture near S coast Andhra, N,N-coast Tamilnadu and Chennai...
... So present easterlies may not bring heavy showers for N,N-coast Tamilnadu and Chennai during next 2 days !

Today, tomorrow...
Heavy scattered rain for central, S-E coast Tamilnadu and central,S-central,S Tamilnadu .. http://ow.ly/i/7XdOe 

By Thursday, a LOW / depression is expected to form over S Arabian sea and drift West towards Somali coast !

More easterlies expected to affect Tamilnadu coast before end of December.
Next expected to reach on 22-Dec !
These continuous easterly wave "can" pop a Depression or Cyclone over S,S-central Bay during last week of December.
Remember Cyclone Thane ?
Remember Cyclone Thane ?? check here for more ... http://indianweatherman.blogspot.in/search?q=thane

Next Easterlies is very near to Tamilnadu coast, Chennai.
It'll start affecting with rain after midnight today !!.. http://ow.ly/i/7WhVt 

Scattered intermittent showers for central,N coast Tamilnadu and Chennai from early hrs of tomorrow, 16-Dec.. http://ow.ly/i/7WjIi 

RT @Serene_Meadows: @weatherofindia
Raining quite heavily now in Delhi. 9:05pm

For South India, another easterlies is speeding towards Tamilnadu coast... http://ow.ly/i/7VXdc 
A low-level circulation also expected to pop over S-W Bay along Srilanka coast tomorrow... http://ow.ly/i/7VXkU 

Showers expected to start along central,S-E,N coast of Tamilnadu from early hrs of Tuesday.
Easterlies is expected to persist along Tamilnadu coast from Tuesday even till 21-Dec !!

"More heavy rain ahead for interior, coast"

RT @Serene_Meadows: @weatherofindia Cold with a mild breeze outside but no rains during the night (Delhi). (5:35am)
RT @Serene_Meadows: @weatherofindia Cold winds, unseasonal rain heralds winter in Capital - Hindustan Times http://t.co/HiXkMAntLe 

RT @SkymetWeather: #Hailstorm in #nashik damages #grape production worth 18 crore. READ FULL REPORT: http://t.co/UcNxo85IrS @weatherofindia 
RT @SkymetWeather: Maximums in #Delhi drop, colder days ahead. http://t.co/ErkiymYOrh #WinterIsComing #Winter @weatherofindia @WeatherDelhi 

Yesterday across N India, the day temps dropped...
Ambala = 15C (-7)
Chandigarh = 15C (-7)
Shimla = 7C (-5)
Lucknow = 19C (-6)

Scattered heavy rain over N,N-central India due to W.D...
Ambala = 39.8mm
Chandigarh = 74.3mm
Bhuntar = 77mm
Shimla = 62.4mm
Patiala= 17.1mm

Now, the upper-level W.D trough is seen along N-W India dipping South upto 21N ... continue to drift East.. http://ow.ly/i/7VWFr 
By morning of 16-Dec, the present W.D trough is expected to drift East and move along north zones of E,N-E India.

Before Monday morning...
Scattered showers over N-E Madhyapradesh, N Chatisgarh, W,central,E Uttarpradesh, W Bihar.. http://ow.ly/i/7VWUL 
Monday, thru the day into midnight..
Scattered rain for N Chatisgarh, E Uttarpradesh, Bihar, N Jharkhand, N Bengal and Sikkim.
Tuesday morning..
Scattered rain for Northern zones of N-E states of India.
That'll be the end of present W.D system !

Chennai - 1pm, heavy rain now over Polichalur zone. Dark as 6pm.

Weather Instagram at December 13, 2014 at 11:18AM

11:07am, Warm and sultry in Karaikal. #weather

from Instagram

Weather Instagram at December 13, 2014 at 11:15AM

Chennai - 11:15am, more sharp showers in Polichalur zone. #weather

from Instagram

Rains

[1] The cloudy weather and associated isolated or scattered rains for somewhat 60% of India is unusual for this  period.(except for TN,CAP & parts of Kerala where the rain is seasonal climatologically)

[2] The prevailing wind pattern can be generalized for 13 Dec 2014 / 0530 hrs as given below:

• ·         East of about 77 Degree E and unto North of about 10 Degree N, the prevailing wind is predominantly NEly.

• ·         Elsewhere in Arabian Sea & Indian Ocean it is SEly turning to SWly and engulfing the entire India.

[3] The East west trough identified near 5 Degree North which is responsible for rains in down south including parts of Kerala & Karnataka and troughs in easterly wave responsible for rains in North Coastal districts in TN & coastal AP

12:02am, Heavy rain in Karaikal!

#Kochi: Raining for last 1 hr with more intensity. With camera person Anu, its Kanal for @WeatherOfIndia http://t.co/0shGlf6aHT 8:30pm

RT @I_AshishRai: A drizzly rainy night in Western U. P., suddenly change the night environment.
@weatherofindia
#Saifai #Etawah 10:12pm