With a low-pressure formation over the central parts of the Bay of Bengal, Kolkata and the adjoining areas of south Bengal are likely to receive light to receive heavy showers over the next 48 hours. 

The India Meteorological Department (IMD) on Wednesday said maximum intensity rain will be recorded in Andhra Pradesh, Odisha, West Bengal, and the northeast on October 22 and 23.

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It will be a wet Durga Puja for West Bengal as the Meteorological office has predicted the heaviest rainfall on October 23, which is likely to continue till the forenoon of October 24. On these two days, entire northeast would also remain under the influence of the depression, which by then would be over Bangladesh.

There are chances of heavy rain in different districts of South Bengal including Kolkata. East Midnapore and South 24 Parganas are likely to receive more rain. Light to moderate rains with thunderstorms are expected in South Bengal from October 22 to 24. Heavy rains are forecasted in one or two places on Thursday (October 22). The southwest monsoon winds will be active again. In the next two to three days, the monsoon season will again start in different states including West Bengal, Sikkim and Chhattisgarh.

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“A low-pressure area that formed over the central Bay of Bengal on Tuesday has intensified into a well-marked low-pressure area over the west-central Bay of Bengal. The system is likely to further intensify into a depression over the next 24 hours and deep depression over the next 48 hours,” said Sanjib Bandyopadhyay, deputy director-general, India Meteorological Department, Calcutta.

It will move in a northwest direction and then take a north-northeast turn towards the Bengal-Bangladesh coast. Under the influence of the system, the districts of East Midnapore, North, and South 24-Parganas are likely to get heavy rain on Thursday and very heavy rain on Friday. Calcutta, Howrah, Hooghly, and Nadia, are likely to get heavy rain between Friday and Saturday, “he added.

On October 23 and 24, the wind speed could go up to 45-55 km/hour, gusting to 65 km/hour. Squally winds would prevail along north Bay of Bengal.

According to the weather office, the maximum temperature in the city on Thursday was 33.1 degrees Celsius. The minimum temperature was 25.5 degrees Celsius. In cities and suburbs, the maximum relative humidity was 92 percent and the minimum relative humidity was 61 percent.