Yesterday saw heavy rains in parts of South Tamil Nadu with Tirunelveli recording 15 cms at the time of writing this post of which nearly 10 cms in one hour. Similarly many places in Toothukudi & Virudhunagar has recorded moderate to heavy rains as well. While South TN saw bursts of heavy rains, Coastal Tamil Nadu from delta till Chennai saw day long light rains with occasional heavy spells making it a relatively better day in terms of ground water recharge.
While the overall dynamics in terms of the Upper Air Cyclonic Circulation continues to remain valid the position of the circulation has moved slightly to the East towards the more open waters of Southwest Bay. While it was straddling Sri Lanka / Gulf of Mannar the wind pattern remained very favorable for North Coastal TN & Delta districts bringing heavy rains to these places over the last couple of days.
The current wind pattern brings more Northerlies into play over North Coastal TN while making South TN see favorable wind pattern for rains to continue. While rains will continue over Coastal TN from Delta to Chennai the best spells of rains today are likely over South TN with once again Tirunelveli, Thootukudi, Virudhunagar & parts of Kanyakumari district favorably placed for rains.
Due to possible wind convergence over coastal TN one or two place could get isolated heavy rains if the dynamic wind pattern changes favorably during the day. There is a faint chance for one or two places around the vicinity of Chennai to see isolated heavy spells of rains but overall things will be relatively quieter compared to the past few days.