Gangetic West Bengal and Sub-Himalayan West Bengal and Sikkim are entirely two different pockets in terms of geography. West Bengal is a plain area wherein the Sub-Himalayan West Bengal and Sikkim is mountainous terrain.
During the Monsoon season, Sub-Himalayan West Bengal and Sikkim along with Northeastern states are one of the rainiest pockets under the category of mountainous terrain. Whereas, Gangetic West Bengal along with other eastern states of the country is the rainiest pockets in the ‘plains’ category.
Both these pockets are characteristically different. During the Active Monsoon phase, we find good rains over the plains, but Sub-Himalayan West Bengal and Sikkim will be lower than Gangetic West Bengal. Whereas if there is a Weak Monsoon on account of Break Monsoon conditions (broadly defined as when the Trough line shifts along the foothills) rains go down over Gangetic West Bengal but will phenomenally pick up in the Sub-Himalayan West Bengal and Sikkim. The rains over these two places are of different varieties.
Now, a situation is building up for Trough line to shift along the foothills and this situation will prevail for a week or so. The situation is normally revived when a fresh system is about to come in the Bay of Bengal and the experts foresee a Cyclonic Circulation brewing up in the Bay of Bengal.
The shifting process will be completed in another 24 hours and then torrential rains will be a sight in the Sub-Himalayan West Bengal and Sikkim. Sub-Himalayan West Bengal and Sikkim are expected to witness rainfall in three digits and these rains will be majorly seen during late evening or night and would go on till early morning. These very heavy rainfall activities will be accompanied by frightening lightning and severe thunderstorms. Places like Darjeeling, Kalimpong, and Siliguri will be impacted.
Also, our experts have to say that we cannot lower our guards and localised flood like situation is expected.
It has been raining profusely in East India from the past 48 hours. Yesterday, Patna recorded 65.4 mm of rains while Muzaffarpur witnessed 37.6 mm of rains.
For June, Gangetic West Bengal ended with a deficit of 58% and Sub-Himalayan West Bengal and Sikkim ended with a deficit of 23%. Whereas, today Gangetic West Bengal stands at a deficiency of 44% and Sub-Himalayan West Bengal and Sikkim at 32%. It is expected that the deficiency levels of Sub-Himalayan West Bengal and Sikkim would drop this week and it won’t be a surprise if the values become surplus as well. Gangetic West Bengal will see light rains with moderate spells at few places for a week.
Image Credit: The Weather Channel
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