Due to the active easterly wave, the entire state of Tamil Nadu has been receiving good rains since the last two to three days. In fact, the capital city, Chennai has also received moderate to heavy spells of rain during this period.
In the last 24 hours from 08:30 am on Wednesday, Yercaud recorded 24 mm of rain, followed by Parangipettai 22 mm, Chennai 21 mm, Pamban 13 mm and Vellore 12 mm.
Now the trough which was extending from Southwest Bay of Bengal to South Andhra Pradesh Coast has weakened. Therefore, rains over Chennai as well as over most ports of Tamil Nadu will decrease and weather conditions will go almost dry.
At present, a cyclonic circulation is seen over Southwest Bay of Bengal and adjoining equatorial Indian Ocean. Therefore, on and off rains may occur over south coastal districts of the state during the next 48 hours. Meanwhile, weather of Chennai as well as most of the other districts will remain dry.
Furthermore, a low-pressure area is expected to form over Southeast Bay of Bengal around December 9, that low is likely to move in west/northwest direction towards North Tamil Nadu Coast and will gradually intensify into a depression.
Thus, we expect scattered rains to commence over north coastal districts of Tamil Nadu including Chennai around December 14 and will increase between December 15 and 16. However, we have to wait and see the excepted location of heavy spells over the state.
Image Credits – Livemint
Please Note: Any information picked from here must be attributed to skymetweather.com