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Kolkata: AS many as six districts in Bengal are shivering under a cold wave and most of the remaining 17 districts are experiencing cold day conditions for the past two days.

Even the state capital, Kolkata, is experiencing the chilliest winter since 2013, with the mercury today coming down to 10.5 degree Celsius ~ a record low over the past four years. The city had recorded a minimum temperature of 9 degree Celsius on 9 January 2013.

The districts that experienced cold wave today are Nadia, Birbhum, Bankura, Murshidabad, Cooch Behar, and Jalpaiguri.

Cold wave is a weather phenomenon that is distinguished by a cooling of the air. The precise criterion for a cold wave is determined by the rate at which the temperature falls, and the minimum to which it falls in 24 hours.

Cold day condition, on the other hand, refers to low temperature and lack of warmth in the weather.

The worry is that the weather office in Kolkata has forecast that the cold wave and cold day conditions will prevail for the next four days until 12 January, if not more. Going by the trends from the previous years, the mercury usually keeps sliding until 14 January, the day of Makar Sankranti.

The warning for north Bengal districts that are closer to the Himalayas and also for Nadia, Murshidabad, Birbhum, East Burdwan, West Burdwan, and Jhargram is severe.

The weather office today said that these districts will continue to witness cold wave until 12 January and the situation might get worse over the next 48-hours. Dense fog will add to the travails by affecting train and bus services.

In fact, Jalpaiguri today recorded the state’s lowest temperature at 3.8 degree Celsius and was closely followed by neighbour Cooch Behar at 3.9. The fall was by 6 and 5 notches, respectively, over normal temperature at this time of the year.

In Malda, the mercury touched a low of 5.7 degree Celsius, a plunge by six notches than normal. The suffering of the people got augmented by the accompanying dense fog. Trains passing through north Bengal ran by several hours delay as has been the case for the past three days.

Santiniketan, another place in Bengal known for bitter cold, today recorded the minimum temperature at 6.8 degree Celsius. This is a dip by five notches than normal.

Krishnanagar in Nadia recorded 7.8 degree Celsius, down by three notches; Behrampore in Murshidabad 7 degree Celsius, down by five notches; Bankura 8.6 degree Celsius, down by four notches; and Digha in East Midnapore saw the mercury plunge to 9.5 degree Celsius, a dip of four notches over normal.