In a span of 24 hours from 8.30 am on Wednesday, moderate rain of 21 mm was observed in Ranchi while light to moderate rains occurred over many parts of Gangetic West Bengal including places like Shantiniketan and Bankura.
At present, a confluence zone is affecting East India as it was previously affecting the central parts of the country but now it has shifted eastward. So, due to the presence of this weather system, we expect scattered light to moderate rain and thundershower in many parts of Jharkhand as well as Gangetic West Bengal during the next 24 hours.
By December 28, the rainfall activity would subside from most parts of Jharkhand and West Bengal. However, isolated light rain may continue in the southern districts of West Bengal until then. Thereafter several parts of Jharkhand and West Bengal will start observing clear weather conditions.
These rains are termed as 'unseasonal rains' as the rainfall activities during the month of December are very rare. Usually, rain is seen in many parts of Odisha, West Bengal and Jharkhand due to the formation of weather system like the Low-Pressure Area, Depression or a Cyclone in the central and the northern parts of Bay of Bengal. This year in the month of December, we have not seen any of the weather system developing in the north or central parts of Bay of Bengal but a confluence zone has now shifted eastwards which would affect most parts of Jharkhand, Odisha and West Bengal by December 28.
The minimum temperatures may drop by 2-3 degrees Celsius as cold winds are blowing from the northwest direction over entire East India.
Image Credit: Times of India
Any information taken from here should be credited to skymetweather.com