Due to Easterly Wave for next 3-4 days, there will be some sharp showers and moderate rainfall activity in South TN, coastal areas and interiors and also in Chennai

By Tamil Nadu Weatherman on 19 Nov 2017 | read

Coming days, do carry ur umbrella / Rain coat, u will never know when the sharp spells will lash among sunshine
Before the last week rains begin we are going to see moderate rains in many parts of Tamil Nadu. This time Delta region (Nagai, Thiruvarur, Thanjavur, Karikkal, Perambalur, Ariyalur), South TN areas such as Thoothukudi, Tirunelveli, Sivaganga, Pudukottai, Ramanathpuram, Madurai, Virudhunagar, Dindigul, Theni, Kanyakumari districts will all get rains. Tichy, Namakkal, Salem too will get one or two spells in next 3-4 days.

Western district such as Coimbatore and Erode can sneak in some moderate rains in one of the days.

KTC belt (Kanchi, Tiruvallur and Chennai) - watch out for sudden spells here
North Coastal district such as Chennai, Tiruvallur, kanchi and Cuddalore will also get rains. Interior districts will also get rains atleast one or two days. The north interior district such as Vellore, Tiruvvannamalai, Villupuram too will get one or two spells.

No Flood threat or no massive rains from this spell of next 3-4 days
Kindly note, the rains will not happen in all the places at same time. No flood threat from the next 4 days spell. Just enjoy them.

NEM to get super active in Tamil Nadu from month end.
Its going to be exciting days from last days of November and 1st half of December. This is not chennai specific. Entire TN which has missed rains have good possibility to get good rains.