After a break Chennai & many parts of Coastal Tamil Nadu recorded moderate to heavy rains under the influence of the Low Pressure Area continuing to persist off Sri Lanka. In what was a completely unexpected spell in terms of intensity Chennai Meenambakkam recorded 10 cms of rains of which 7 cms fell in three hours between 11:30 PM & 2:30 AM. South Chennai & Suburbs saw the more intense thunderstorms of those that hit Chennai and surrounding areas.
With the Low Pressure Area of Sri Lanka slowly making its journey towards the open waters of Comorin Sea / Arabian Sea rains are likely to continue over Coastal Areas of Tamil Nadu. Initial indications are the LPA possibly now lies W/SW of Sri Lanka having completed its land interaction as it crossed the Sri Lankan land mass while moving East to West. This could provide an opportunity for this system to regain some of the intensity.
This W/NW movement could give the LPA a new lease of life and possibly bring a more active monsoon dynamics to South TN & Coastal areas. With Easterlies now fairly getting streamlined over Tamil Nadu as indicated by the rains received in interior areas like Karur, Namakkal, Kangeyam things could get better in the next couple of days as the LPA possibly consolidates. Today also we are likely to see Coastal areas & South TN record rains as the convection currently lying over the Bay moves over the land under the influence of Low Level Easterlies. Isolated places in Delta Areas & South TN along the Western Ghats could get heavy spells at times.
In the meanwhile there is a fresh disturbance that is likely to emerge in Southeast Bay under the influence of MJO prevailing in the region which could alter the dynamics in the coming days. More than ever taking one day at a time will be wise for the next few days.