HomeUrban NewsKolkataKolkata Weather Alert Issued as Monsoon Trough Brings Heavy Weekend Rain

Kolkata Weather Alert Issued as Monsoon Trough Brings Heavy Weekend Rain

Kolkata and neighbouring districts are set for intensified rainfall over the weekend as the monsoon trough shifts southwards and a cyclonic circulation takes hold, according to the Regional Meteorological Centre (RMC). With intermittent showers already reducing the mercury to around 30 °C, the city anticipates a sustained rainy spell driven by a dynamic atmospheric system centred over northern Gangetic Bengal.

The India Meteorological Department (IMD) has issued a special bulletin confirming that the monsoon trough at mean sea level now runs through Bikaner, Jaipur, Datia, Sidhi, Asansol, Kolkata and into the northeast Bay of Bengal, while an upper-air cyclonic circulation extends over northern Gangetic Bengal up to 5.8 km above mean sea level This combination, when coupled with robust monsoon flows, underpins forecasts of moderate to heavy rain across parts of West Bengal. RMC head of forecast operations stated that the weekend weather system will bring intensified rainfall to Kolkata, with some districts likely to experience heavy spells. While Kolkata recorded only light rain until Friday evening, the cloud cover helped bring down daytime temperatures to around 30 °C from over 31 °C the previous day .

According to the IMD bulletin, South and North 24 Parganas, Hooghly, Nadia, and Midnapore districts could see heavy to very heavy rainfall, even as Kolkata gears up for moderate yet persistent shower. The weekend pattern aligns with the seven-day forecast, which shows consistent wet weather through at least Tuesday . This active monsoon phase is part of the broader synoptic setup. The trough and cyclonic circulation are fueled by a low-pressure system in the Bay of Bengal, combined with strong low-level moisture convergence over eastern India—a configuration typical of monsoon intensification periods .

Urban infrastructure in Kolkata is likely to be tested. Light to moderate rain since Friday has barely disrupted life, but authorities warn that heavy weekend downpours may lead to waterlogging in low-lying areas and temporary traffic disruptions. The RMC forecasts caution that gusty winds of 30–40 km/h and lightning could accompany heavy showers in some districts . Environmental analysts highlight that this rainfall offers both relief and a reminder. While the showers can suppress ambient pollution and cool urban microclimates, they also expose the city’s vulnerability to inadequate drainage and flood preparedness—especially in densely populated zones with impervious surfaces. This aligns with our agenda of promoting zero‑carbon, climate‑resilient cities that blend natural water absorption with engineered safeguards.

Climate experts note that sustained rain at this time of the monsoon could ease heat stress but stresses that resilience must go beyond episodic benefits. Rainwater harvesting, permeable pavements, and green swales are necessary to reduce urban runoff. With Kolkata’s growing footprint, investing in nature-based solutions must become a long-term planning priority. As the weekend progresses, residents are advised to remain weather-aware. Emergency services are likely to step up monitoring in vulnerable zones, and civic bodies may need to activate de‑silted drains and water‑pumping systems. Commuters should expect slower road conditions, especially near underpasses and low-lying stretches.

By early next week, rainfall may taper off slightly but remain frequent through Tuesday. The relief from heat is welcome, but the true test lies in how the city harnesses this monsoonal pulse to shore up its urban resilience—balancing the restorative power of rain with sustainable infrastructure and equitable city planning.

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Kolkata Weather Alert Issued as Monsoon Trough Brings Heavy Weekend Rain
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