Many parts of Interior Tamil Nadu enjoyed a good spell of overnight rains as wind induced instability triggered thunderstorms as expected by models. Notable mention has to be Periakulam in Theni district which got 61 mm from these thunderstorms. Virudhunagar district also enjoyed moderate rains along with parts of Tirunelveli & Madurai districts. Isolated places in North Tamil Nadu enjoyed a spell or two of rains from thunderstorms that must have caught many people off guard.
Parts of Chennai also recorded light rains after midnight around 2 AM as both the IMD observatories in the city recorded 1 mm rains which happened nearly a month after the last spell of showers that hit the city. On 11th January Meenambakkam recorded 7.5 mm while Nungambakkam recorded 1.7 mm rains since then it has been dry spell for the city until last night.
Weather Models indicate the wind instability that has been triggering the thunderstorms over interior Tamil Nadu for the last couple of days to become less marked today making it a relatively quiet day on the rain front today for the state. There is likely to be better chance for rains in Kerala & places along the Western Ghats in Tamil Nadu with the rain bands shifting slightly to the west compared to yesterday.