4:30pm, Scattered T showers seen over Odisha, S Jharkhand, S,central Bengal, W-ghats Kerala, Tamilnadu ... http://ow.ly/i/6XUmm 

#Chennai - 5:15pm, Heavy rain seen over N-W, W from city at around 35 to 60km.. and traveling S-S-W now, not expected to move into city.

Analysis show that 98B is almost fizzled out over N Bengal. Now a low-level N-S trough can be seen from N Bengal to S Andhra coast .
At 850hpa level, the N-S trough is seen from N Bengal to W-S-W Bay near to Tamilnadu coast ... http://ow.ly/i/6XRch 

At mid-level (700hpa) the N-S trough is seen from N Bengal to N,N-W Bay near to Odisha coast ... http://ow.ly/i/6XRhC 
At mid-levels, the anti-cyclone over S-central Rajasthan persists and will drift East in next 2 days !

An upper-level weak circulation is expected over Bihar in 24hrs and may persist with a trough slanting S-W upto S Chatisgarh for 48hrs.
Here's the plot of expected upper-level circulation over Bihar in 24hrs ... http://ow.ly/i/6XRs0 

In 24hrs, the low-level NS trough will get established from Bihar, N Bengal to S tip Tamilnadu.
In that N-S trough, a low-level circulation is expected to form over S Karnataka and S Andhra on 24-Sep ... http://ow.ly/i/6XRzf 

By Friday, 26-Sep... W-central India is expected to host an Anti-cyclone at 850hpa level ... signalling the Monsoon withdrawal !

Rainfall alert for next 42hrs
~~~~~~~~~~~~~~~~~~~~~~

Before morning of 23-Sep...
Scattered T showers for N,central,N-W,W, W-ghats Tamilnadu, W-ghats Kerala, W-ghats,S Karnataka.
Before midnight today, HEAVY rain expected over Nilgiris zone of Tamilnadu... http://ow.ly/i/6XSgg 
In Next 24hrs...
Scattered T showers will be over Odisha, S,central Bengal.
AND
HEAVY, widespread rain over N,central zones of N-E states.

23-Sep...
Again heavy, scattered T showers will pop over W-ghats of Kerala, Tamilnadu, Karnataka ... http://ow.ly/i/6XSvz 
23-Sep...
Scattered T showers for Bangalore, S Karnataka, N-W,N,N-central,central Tamilnadu.

23-Sep...

Some T showers will persist over Odisha.

And

HEAVY rain over N-E states will go down slowly from evening of 23-Sep.

23-Sep...

evening, late-evening - Heavy rain possible over S,S-central Andhra.

#Chennai - 23-Sep, noon, evening - T Showers possible for W,N-W,S-W suburbs than for the main zones of city !

Weather Instagram at September 22, 2014 at 01:37PM

#chennai at 11:45am, a sharp shower was developing over SW zone of city at that time. #weather

from Instagram

RT @naveenkumars84: Its raining continously from last evening onwards at my home town #Arani #Raining #Constantly @weatherofindia 2:54am

Chennai - 3:46am, moderate rain for past 20min over Polichalur zone. Now becoming heavy!
Heavy rain ahead for South of city!

#Chennai - 9:39am, IWM Polichalur station records 24.6 mm of rainfall. Now its clear, getting hot and super humid!