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Kolkata and South Bengal are bracing for a much-needed break from the scorching heat as the weather department predicts rain, thunderstorms and Kalbaisakhi storms starting Thursday, May 15th, 2025. With temperatures soaring and humidity making life uncomfortable, the forecast of gusty winds, lightning and hailstorms brings hope for relief. But which districts will see the heaviest showers and how will this impact daily life.? Let’s dive into the details.

Details & Context
South Bengal including Kolkata has been grappling with oppressive heat and humidity for days. On Monday, brief showers offered temporary relief but the heat returned with a vengeance. According to the India Meteorological Department (@IMD) a shift is coming. Starting Thursday four districts,

·      West Midnapore,

·      Jhargram,

·      East and West Bardhaman,

·      Birbhum—are likely to experience Kalbaisakhi, the iconic pre-monsoon storms known for their dramatic winds and heavy rain. These storms could bring gusts of 60-70 km/h, lightning and even scattered hailstorms.

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Kolkata and other South Bengal districts will also see partly cloudy skies, light to moderate rain and winds of 30-50 km/h. By Friday, Nadia and Murshidabad may join the list of Kalbaisakhi-affected areas with similar stormy conditions. The @IMD predicts that rain and thunderstorms will continue across all South Bengal districts including Kolkata through Saturday and Sunday with wind speeds of 30-40 km/h. Monday’s forecast points to renewed rain in Nadia and Murshidabad.

In Kolkata, mornings will start clear but turn hot and humid as the day progresses. By afternoon or evening, expect cloudy skies and a chance of thunderstorms. Today’s minimum temperature in Kolkata is 29.6°C, with yesterday’s high at 35.3°C. Humidity levels, ranging from 58% to 85%, are adding to the discomfort.

North Bengal meanwhile is set for its own dose of rain. Districts like Darjeeling, Kalimpong, Alipurduar, Cooch Behar and Jalpaiguri are expected to see heavy showers with scattered downpours possible through Saturday. The early arrival of the southwest monsoon in the Nicobar Islands on May 13th—five days ahead of schedule—signals a wetter season ahead, though South Bengal may not feel its full impact yet.

Quotes

·      “Kalbaisakhi storms are a double-edged sword. They bring relief from the heat but can disrupt daily life with strong winds and lightning. Stay cautious.!” – Dr. Sanjib Bandyopadhyay, @IMD Kolkata.

·      “After days of unbearable heat, the forecast of rain is a blessing for Kolkata residents. We’re ready for cooler days.!” – Priya Das, a Kolkata-based teacher, via X.

Additional Information
The @IMD has issued heatwave alerts for Rajasthan and Uttar Pradesh while hot and humid conditions persist in Andhra Pradesh, Jharkhand, Bihar, Odisha, Tamil Nadu and Puducherry. Rough seas are expected in the southwest Bay of Bengal and Andaman Sea with winds of 45-55 km/h prompting warnings for fishermen to avoid these areas. Heavy rainfall is also forecast for Assam, Meghalaya, Arunachal Pradesh and the Andaman-Nicobar Islands over the next 24 hours.

Recent posts on X highlight public sentiment: users in Kolkata are eagerly awaiting rain but express concerns about potential waterlogging and power outages common during Kalbaisakhi storms. A quick scan of social media shows hashtags like #KolkataWeather and #BengalRain trending with over 10,000 mentions in the past 24 hours.

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Impact Analysis
The incoming rain and storms will likely have mixed effects,

·      Positive Impact: Cooler temperatures will provide relief from the heatwave, benefiting residents, farmers and outdoor workers. Reduced heat stress could also ease pressure on healthcare systems.

·      Challenges: Strong winds, lightning and hailstorms pose risks to infrastructure, crops and safety. Kolkata’s drainage system may struggle, leading to waterlogging in low-lying areas. Power outages are a concern, as seen during past Kalbaisakhi events.

·      Economic Angle: The rain could delay construction projects but boost agricultural activities, especially in districts like Birbhum and West Midnapore where farmers await pre-monsoon showers.

Conclusion
The forecast of rain and Kalbaisakhi storms is a game-changer for West Bengal, especially for heat-stricken Kolkata and South Bengal. While the showers promise relief, residents should prepare for gusty winds, lightning and possible disruptions. North Bengal’s heavy rainfall adds to the state’s dynamic weather shift, driven by cyclonic circulations and the early monsoon in the Nicobar Islands. Stay updated, stay safe and embrace the cooler days ahead.!

Call to Action (CTA)
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