For the past few days we have been witnessing only a little thunderstorm activity owing to very active Monsoon conditions across India.
As mid level and surface level westerlies likely to weaken, thunderstorms are set to return with a bang over North Tamil Nadu including Chennai city from July 8th onwards. Early sea breeze will collide with weak westerlies, which will result in convergence over North Coastal TN, thereby triggering thunderstorms. It will also make sure that temperatures stay in check over coastal areas of Tamil Nadu.
West coast of India will continue to receive rains as offshore trough will remain intact with some slight weakening seen.