Officials said a weak low pressure area over the Bay of Bengal caused the rainfall
Intermittent showers lashed the city on Monday affecting traffic on arterial roads and leaving behind puddles of water. Later in the evening, heavy rains were reported from certain parts of the city.
Incidentally, the morning was sultry but the weather took a turn for the better when light showers brought relief to residents early in the evening. However, the rains intensified later.
Though the rains lasted only for a brief while, it left puddles on several roads and traffic on arterial roads was affected.
The day temperature had touched 36.1 degree Celsius in both weather stations at Nungambakkam and Meenambakkam, one degree Celsius above average temperature, on Monday. Several areas, including Avadi, Nungambakkam and Tiruvallur, received showers of about 2 mm till 5.30 p.m.
Officials of the meteorological department said that a weak low pressure area over the Bay of Bengal had caused the rainfall over northern coastal districts, including Chennai. Once the system moves inland, rainfall will decrease.
The Doppler radar images showed patchy clouds over the city and the rainfall may not be widespread, said an official. The rainfall would continue for one or two more days during evening or night.