City gets rainy season’s 1st orange alert

City gets rainy season’s 1st orange alert 

Rain Activity Likely Due To Weather System That May Form Over The Bay Utejonmayam@timesofindia.com 

13.10.2024

Chennai : The met department has issued an orange alert for Chennai and neighbouring districts of Kancheepuram, Chengalpet and Tiruvallur on Oct 15, saying heavy to very heavy premonsoon rain of 6cm to 20cm is likely next week. India Meteorological Department (IMD) has also issued a yellow alert (6cm-12 cm) for Chennai and its suburbs for Oct 14 and 16, saying they are likely to receive heavy rainfall. The rain activity is likely due to a weather system that may form over the Bay and bring spells across several districts next week. Bloggers said if the system moves slowly, the rain activity may last longer. “For the next 48 hours, the city and the suburbs may receive moderate intensity rainfall with thunderstorms and lightning over some are as. Sky condition is likely to be partly cloudy. Maximum temperature is likely to be at 32°C-33°C and minimum temperature likely to be 25°C26°C,” said an IMD bulletin. 

At present, there is an upper air cyclonic circulation over the south Tamil Nadu coast and one over the southwest Bay of Bengal. Meteorologists said the latter system may develop into a low pressure and may move along the Tamil Nadu coast, bringing rainfall to several districts. It may or may not develop into a depression as it may be close to the coast and not over deep sea to gain energy from the warm waters. On Oct 14, districts such as Nagapattinam, Thanjavur, Thiruvarur, Kancheepuram, Chennai, Tiruvallur, Kallakurichi, Tiruvannamalai, Ariyalur, Chengalpet and Mayiladuthurai may re ceive heavy rain. Rain intensity may increase on Oct 15 as Tiruvallur, Chennai, Kancheepuram, and Chengelpet may receive heavy to very heavy rainfall. Rainfall may continue on Oct 16, with ghat  areas of Coimbatore, Nilgiris, Erode, Dharmapuri, Tirupattur, Kancheepuram, Chennai, Krishnagiri, Salem, and Tiruvannamalai districts possibly receiving heavy rainfall. 

In the last few days, Chennai city received on and off rain spells of light intensity, as cloudy weather kept the day temperatures down. The overnight rainfall left 1 cm each in Nungambakkam and Meenambakkam. The day after the night spells was pleasant, with temperatures. Nungambakkam and Meenambakkam recorded 32.1°C and 31.4 °C, 0.8 °C and 1.5 °C below normal Blogger Pradeep John, in an online post, said the system may form over the south-central Bay and move towards the north Tamil NaduSouth Andhra Pradesh coast. “Whenever a system takes this route, it gives plenty of rainfall to the north Tamil Nadu and South Andhra Pradesh coasts, and particularly with the convex shape of the Chennai coast, they fall on the hotspot. If the low pressure slows down near the coast, it can give rainfall for more than 2-3 days,” he said. MSID:: 114172736 413 |