Monsoon onset and complicated 1st week of June

Today, the low-level N-S LWD is seen from E-central, East India to N,N-W Tamilnadu ... http://ow.ly/i/b3gDq 
Today, the HEAT along S-E coast of India is slightly lower, due to low-level winds from S, S-S-E that is from Bay.

Chennai - Airport records 40.3 C while Nungambakkam records 38.6 C.
In rest of India, especially N,central,E-central India the #HOT conditions continued and will continue !
#HOT conditions to continue over central, E-central, S-E coast upto N-E,central Tamilnadu on 30,31-May... http://ow.ly/i/b3huO 

Today, HEAVY rain occurred along W,N-W,S Karnataka due to slightly Westward drift of seasonal N-S trough over India.
Something like April.
Westward drift of N-S trough can be attributed to the S central Bay's mid,upper-level circulation and West movement http://ow.ly/i/b3hUI 
Today, the upper-level circulation is also seen over same S-central Bay and seen drifting West... http://ow.ly/i/b3i1d 

By 1-Jun, both the mid, upper-level S-central Bay circulation is expected to drift near to N-coast Tamilnadu... http://ow.ly/i/b3ibO 
This is expected to launch the SW Monsoon along S-coast Kerala on 2-Jun as a weak current ! http://ow.ly/i/b3ijw 
To make things worse, a mid, low-level circulation is expected on 2/3-Jun over S,S-E Arabian sea and models suggest a strengthening !
@MODIfiedLiv >> With NO LOW in North or central Bay .. the Monsoon start is expected to be weak atleast for 3/5 days along Kerala coast.

On 30-May...
HEAVY T showers again for W-ghats Kerala, N,N-W,S-W,S Karnataka and N,N-W,W-ghats Tamilnadu ... http://ow.ly/i/b3iUQ 
On Sunday, 31-May...
More T showers for W,S-W,S,S-central Karnataka and this time some heavy along Karnataka coast as well.
On Sunday into Monday... Monsoon style showers possible along Kerala coast, S-coast Karnataka and S-tip Tamilnadu http://ow.ly/i/b3jrS 
More rain for N,N-W,w-ghats,N-central Tamilnadu on Sunday, 31-May.