After recording the hottest day in more than two weeks Good Overnight Rains lashed many parts of Chennai & Surrounding areas in the districts of Kanchipuram & Tiruvallur bringing much needed relief. While the early evening gave some isolated thunderstorms through localized development in few areas of North Chennai it set the tone for the Sound & Light Show later in the night when thunderstorms from Rayalaseema region of South AP made their journey towards the sea under the influence of the Westerlies.
Not only Chennai and surrounding areas recorded good rains, parts of Salem & Vellore districts also recorded good rains as well. These rains happened in the evening just as the thunderstorms over Rayalaseema region which started around the same time its journey towards the Coast. In an indication of shape of things to come Coonoor in Nilgiris recorded good rains and Pechiparai in Kanyakumari district recoded moderate rains. This possibly indicates the strengthening monsoon conditions over West Coast.
But the story of the day has to be the North Coastal Tamil Nadu which enjoyed the benefits of being right in line for the interior thunderstorms. Less than 100 kms possibly separated the thunderstorms that formed in the North Interior districts of Tamil Nadu around Vellore & the ones that formed around Madanappalee in South Andhra Pradesh. The thunderstorms near Vellore just stagnated around the area while the ones from South AP crossed the coast. This possibly highlights the difficulty in estimating convective thunderstorms during off season and their possible movement.
Isolated rains are set to continue today as well with fair chance for Coastal areas of TN to pick up some more rains today. Models are indicating below normal temperatures over North Coastal TN so would sea breeze advent happen and create some thunderstorms is a question mark. But like yesterday there is some chance for Interior thunderstorms from South AP moving to the coast Chennai could get some luck from that possibly.