The Meteorological Department has forecast a likely depression over Cape Comorin, south of Kanyakumari. The Chennai regional forecast has also issued a warning in Tamil Nadu and Puducherry of isolated heavy to very heavy rain on Wednesday.
The department said that low pressure in the area around Cape Comorin on Monday had become more marked by Tuesday. This well-marked low pressure may concentrate into a depression and move in the northwesterly direction by Wednesday. "We have issued a warning to fishermen in Tamil Nadu, Puducherry, Kerala and the Lakshadweep coast. There is a likelihood for the low pressure to concentrate into depression on Wednesday," said S R Ramanan, Director of the Area Cyclone Warning Centre of the Regional Meteorological Centre.
Rainfall has been forecast for almost all districts in the State except for interior districts Vellore, Virudhanagar, Tirupur, Tiruvallur, Namakkal, Krishnagiri, Dharmapuri and Karur. Heavy rains have been predicted for Kanyakumari and Ramanathapuram.
On Tuesday the State recorded a rainfall of 5.8 mm. Nagapattinam noted the highest rainfall with 31.6 mm followed by Ariyalur (25.3mm) and Sivaganga (23mm).
The rains brought a dip in the temperature with the highest temperature going down to 35.4 degree Celsius in Dharmapuri. Maximum temperature in Chennai went down 5 degrees below normal to 31 degrees Celsius at the Nungambakkam station and 31.8 degrees Celsius at Meenambakkam station.
On Wednesday thundershowers have been predicted in many places in south Tamil Nadu and at a few places in north Tamil Nadu. The department has also issued a squally weather warning, with wind speed reaching 50-60 kmph, along and off South Tamil Nadu.
In Chennai city and its neighbhourhood the sky condition will be generally cloudy. Rain or thundershowers may occur in some areas. Maximum and minimum temperature will be around 32 and 25 degrees Celsius respectively.