[1] SWM is still prevalent in lower latitude.[i.e below 21 Deg North]. The less strengthen SWM winds at upper level form a UAC near Srilanka.
[2] This UAC is pumping easterlies in to TN region.
[3] This may lead to a formation of low in SE bay.
[4] This is expected to give copious rainfall down south TN.
[5] Two anticyclones along 22 or 21 Deg North latitude one in the west
end and other in the far east end of India is creeping. up
[6] This may lead to simultaneous withdrawal of SWM and onset of NEM by 22 or 23 Oct 2013.