According to the sources of Met officials, Celsius should go downhill. Some of the private forecasts have said that mercury would drop below 10 degrees on Friday. On the other hand, as per the report of regional met office in Alipore, the minimum temperature was anticipated to hover between 12 and 13 degrees. On Thursday, the met office in Alipore said that the Calcutta has received 1.5 mm rain till 8.30 pm. According to Calcutta Municipal Corporation, more showers have taken place in New Market, Dum Dum and Cossipore.