A spell of blinding rain submerged several parts of the city on Saturday afternoon.

BB Ganguly Street, the venue of a protest march against the rape and murder at RG Kar hospital, had almost knee-deep water after the rain. The protesters walked amid the rain and waterlogging.

Several parts of Central Avenue were also waterlogged. Pavements were submerged, too. Southern Avenue and the road under the Park Street flyover were also underwater.

The showers, most intense between 2pm and 4pm, reduced visibility on the roads.

The Met office recorded around 20mm of rain in Alipore. “The variation in the intensity of clouds may alter the intensity of the showers,” said a Met official.

Heavy rain is likely in south Bengal on Sunday as well, said a Met official.

Multiple systems were at play, said a Met bulletin.

“A well-marked low-pressure area lies over southeast Uttar Pradesh and adjoining northwest Madhya Pradesh on Saturday morning. It is likely to continue to move nearly westwards and intensify into a depression over west Madhya Pradesh by August 26 and reach south Rajasthan and adjoining north Gujarat by August 27,” said a Met bulletin.

“The cyclonic circulation over the north Bay of Bengal now lies between 3.1 and 5.8km above mean sea level. Under its influence, a low pressure area is likely to form over the same region during the next 48 hours. Yesterday’s monsoon trough at mean sea level now passes through... Contai and thence southeastwards to northeast Bay of Bengal.

“An east-west trough runs from the low pressure area over southeast Uttar Pradesh and adjoining northwest Madhya Pradesh to northeast Bay of Bengal and extends upto 1.5km above mean sea level,” the bulletin said.