From 8:30am to 11:30am,
Karaikal 54mm, Nagapatinnam 20mm, Chennai Airport 8mm,
Here's a list of past 24hrs (till 8:30am) rainfall figures... http://imdchennai.gov.in/rf_daily.pdf
At present the Easterly trough is seen along Tamilnadu coast and a embedded weak low-level circulation seen over Srilanka.
Both ECMWF and GFS expect present trough to persist and drop strong circulation / LOW over SW Bay on 1-Nov.
Before Tuesday midnight... HEAVY, widespread rain to persist ALL along S-coast Andhra to North to central coast Tamilnadu and #Chennai
During next 24hrs, W-ghats of Tamilnadu, Kerala to get heavy T showers.
Karaikal records 126mm till 5:30pm
During next 24hrs, W-ghats of Tamilnadu, Kerala to get heavy T showers.