8:30pm, #Chennai - Moderate T showers seen over SW,W,NW,N from city at around from 100 to 200km. https://pbs.twimg.com/media/Cnk5eeCWcAA-PhL.jpg:large
T showers over W,SW of #Chennai are reluctant to move East towards coast.
Shower activity around Vellore is observed for past 4 hrs.
There's LWD running N-S from S Andhra to S-central Tamilnadu .. 8:30pm, Satellite IR shows T-showers all along LWD .. https://d2jhuj1whasmze.cloudfront.net/photos/normal/lgOSa.jpg
Another opposing factor for N,central Tamilnadu rains not pushing East is.. an upper-level circulation seen over SW-central Bay !
Here's the chart showing upper-level (500hpa/4.5km ASL) circulation over SW-central Bay near Tamilnadu coast ... https://d2jhuj1whasmze.cloudfront.net/photos/normal/lgP9j.jpg
Chennai - can expect rain on Monday evening, And that too if the T-cells pop very near to suburbs or over suburbs / city.
More T showers ahead for N,N-central Tamilnadu into S Andhra, S,SE Karnataka and #Bangalore on Monday, Tuesday !