Rain relief is on the way for Calcutta, roasting in extreme heat over the past couple of days.
The Met office on Tuesday said moisture-laden air has started moving towards the city from the Bay of Bengal and Odisha.
“A cyclonic circulation has formed over Odisha. This will bring rain-bearing clouds to Calcutta over the next two days. Besides, a high-pressure belt has been noticed over the Bay of Bengal,” said an official at the Alipore weather office.
“Expect a smart shower or thunderstorm by evening on Wednesday because of the two systems working in tandem. The low-pressure cyclonic circulation is drawing moisture from the Bay while the high-pressure belt above the sea is pushing air away from it, thereby acting like two gigantic pumps filling Gangetic Bengal with vapour.”
Calcuttans would expect the “pumps” to work faster and turn on the sprinklers after three days of scorching heat — heatwave Sunday’s 39.9 degrees Celsius, Monday’s 37.8 and 36.6 on Tuesday.
The sky promised to deceive on Tuesday afternoon as it suddenly turned partially cloudy and a few fat droplets fell at scattered places for less than 60 seconds.
Residents near Mani Square on EM Bypass got a taste of nature’s freakshow — it was sunny and cloudy at the same time and the raindrops were unusually big — around 12.30pm.
Shoppers at Esplanade had a similar blink-and-miss experience around 5pm while a fight almost broke out near Kalighat Metro station when some large drops of water fell on a pedestrian, who thought somebody had spat on him.
The brollies were out in force over the past couple of days to block the sun. On Tuesday afternoon, they served their primary purpose: rain shield. “I used the umbrella against the sun in the morning and as a rain guard in the evening,” said Joy Chakraborty, who had stepped out of his Esplanade office around 5pm.
Weather scientists said moisture from the Bay and evaporation of water in Calcutta and its surrounding areas in the high heat of the past few days produced a bit of condensation on Tuesday afternoon. “But the air has been so bereft of moisture because of the belting sun and dry winds from central India on Sunday and Monday that the rainfall on Tuesday hardly registered.”
Arrival of moisture from the Bay would lead to cloud formation and rainfall, a Met official said. “The cloud cover is going to block sunrays and keep the surface temperature down but it will push up relative humidity, which means expect sultry weather for the next couple of days.”