Northeast Desk, 27th September: The India Meteorological Department (IMD) has highlighted a series of dynamic synoptic conditions affecting Sikkim’s weather over the past week, resulting in heavy rainfall across the state. The shifting cyclonic circulations and trough systems have brought varied precipitation levels, with some districts experiencing significant downpours.
According to the IMD, the weather activity began on September 19, when a cyclonic circulation over northern Punjab dissipated, only to be replaced by a new system over the west-central and adjoining southwest Bay of Bengal by September 20. This circulation grew in intensity, eventually forming an east-west trough extending from the Andhra Pradesh coast to south coastal Myanmar by September 22, influencing the weather in northeastern India, including Sikkim.
The patterns continued to evolve, with a fresh cyclonic circulation over northeastern Assam by September 23, which weakened the following day. By September 25, a trough was observed stretching from north Konkan to southern Bangladesh, further shaping the weather across the region.
During this period, the southwest monsoon began its withdrawal from parts of West Rajasthan and Kachchh on September 23, about six days later than the typical withdrawal date of September 17. As the monsoon trough shifted southeastwards, it moved across multiple states, including Jaisalmer and Digha, eventually extending towards the east-central Bay of Bengal, keeping the northeastern region, including Sikkim, under wet conditions.
Sikkim saw widespread rainfall from September 19 to 25, with the IMD reporting significant differences in precipitation levels across districts. The northern district of Mangan and the western district of Gyalshing received the highest rainfall totals, with Gyalshing recording a substantial 90.5 mm of rain by September 25.
In contrast, the state capital Gangtok registered a more moderate 22.2 mm of rainfall, while Pakyong, located in the southeastern part of the state, reported 27.3 mm. Despite the variations, rainfall was robust throughout Sikkim, indicating active weather conditions driven by the shifting monsoon trough and the cyclonic circulations over the Bay of Bengal.
Looking ahead, the IMD has issued a weather warning for Sikkim, forecasting light to moderate rain and thundershowers in most areas over the next week. Above-normal rainfall is expected across the state, although maximum temperatures are predicted to remain within normal limits. However, minimum temperatures are likely to trend below normal, indicating cooler nights in the days to come.
As Sikkim braces for another round of showers, residents are urged to stay prepared for wet conditions and possible localized thunderstorms. With the withdrawal of the monsoon progressing across India, the state’s weather remains under the influence of these dynamic systems, promising more rainfall in the near future.
The IMD’s continued monitoring of these weather patterns aims to keep locals informed and prepared as the region navigates the tail end of the monsoon season.