§  Cyclone Warning Issued for Bay of Bengal

§  #WeatherToday Cyclone warning issued for Bay of Bengal.! West Bengal braces for heavy rain Wed-Thu. IMD on high alert. No direct impact on Bengal. Stay updated.!

§  Deep depression forming over SE Bay of Bengal. Monday: Depression expected. Wednesday: Cyclone stage likely. Landfall: Andhra-Tamil Nadu coast.

§  Winter lovers rejoice.! Cold season delayed to December 10th. November stays humid & warm. Harsh winter from mid-December. Prepare now.!

Kolkata, November 21, 2025: A powerful cyclone system forming over the southeast Bay of Bengal is creating significant weather disturbances across South Asia. The India Meteorological Department (IMD) has issued official warnings as this weather system is expected to intensify into a cyclonic storm by Wednesday, potentially becoming a deep depression by Monday with possible further strengthening. Weather scientists and international meteorological research models have been closely monitoring this development with forecasts indicating westward movement toward the Andhra Pradesh and Tamil Nadu coast.

Cyclone Development Timeline and System Behavior

According to the latest bulletins from the IMD, this cyclone system is following a predictable intensification path. Multiple weather research models have predicted this system’s development weeks in advance through international forecasting platforms. The system, currently positioned over the southeast Bay of Bengal is demonstrating steady westward progression characteristic of post-monsoon cyclonic systems in the northern Indian Ocean.

Some meteorological research models suggest that this system will develop into a weak cyclonic storm stage by Wednesday. Should this scenario materialize, predictions indicate a possible landfall on the Andhra Pradesh and Tamil Nadu coast near the Kakinada region with maximum sustained winds potentially reaching 110 kilometers per hour. The Bay of Bengal’s unique bathymetry—featuring shallow waters and landlocked coastal formations—makes it particularly vulnerable to cyclonic intensification and storm surge generation.

Impact on West Bengal: Indirect Effects Expected

The direct impact of this cyclone system on West Bengal is expected to be minimal, according to IMD forecasts. However, indirect meteorological effects will be significantly felt throughout the state. From Tuesday evening onwards, the southern Bengal sky will become progressively cloudier as the system approaches. Light to moderate rainfall is anticipated over coastal and neighboring districts on Wednesday and Thursday with heavy rain possible at isolated locations in South 24 Parganas and East Midnapore districts.

In Kolkata, thunderstorms with gusty winds are expected on October 28-29 with potentially disruptive weather conditions affecting daily activities. North Bengal districts including Jalpaiguri, Alipurduar, Cooch Behar, Dakshin Dinajpur and Malda are also expected to receive significant rainfall during the same period. The IMD has issued yellow alerts for multiple districts across West Bengal, advising residents to remain prepared for weather-related disruptions.

Winter Season Delayed: November to Remain Warm and Humid

One of the most significant impacts of this cyclone system is the delay it will cause to West Bengal’s anticipated winter season. From Monday onwards, moisture levels in Bengal’s atmosphere will increase substantially due to the cyclone’s circulation patterns. This increase in atmospheric water vapor will create unusual weather conditions for the season.

Although maximum and minimum temperatures may decrease slightly after Sunday, the characteristic dry, crisp feeling associated with Bengal’s winter will not arrive in November. Weather scientists and IMD officials confirm that the winter season traditionally expected to establish in early November will be postponed this year. The meteorological body states there is no possibility of harsh winter conditions returning to West Bengal in November.

Instead, the delayed winter is now forecast to arrive forcefully after December 10th, 2025. This represents a significant departure from typical seasonal patterns with implications for agriculture, human comfort and energy consumption across the state.

December 2025: Harsh Winter Will Establish

The onset of winter weather in December will be pronounced when it finally arrives. Unless unforeseen meteorological obstacles emerge in the coming weeks, harsh winter conditions are expected to persist until at least Christmas, December 25th, 2025. This extended winter spell will bring the cold, dry conditions residents typically associate with Bengal’s winter season.

Multiple meteorological forecasting agencies predict La Niña conditions developing during the November-December period, which typically correlates with colder-than-average winter temperatures across much of India. For West Bengal, this could translate to below-normal maximum temperatures and above-normal nighttime chilling, creating conditions favorable for blanket use and winter clothing.

Kolkata Temperature: Current Status and Forecast

Kolkata’s nighttime temperature showed unusual volatility recently, rising 1 degree from the previous night to reach 19.6°C. Over the next 24 hours, night temperatures are expected to continue rising slightly due to increased atmospheric moisture and the cyclone system’s circulation patterns. This counterintuitive temperature increase despite approaching seasonal change is caused by the moisture-laden air mass associated with the cyclone system.

A slight temperature drop is possible on Monday night as the system’s direct circulation effects diminish. However, the presence of significantly increased atmospheric humidity will prevent the dry, cold winter feeling from establishing. This means residents should not expect the characteristic sharp morning chills and dry winter ambiance that typically characterize this season. The atmospheric conditions will feel more like extended autumn than established winter through November.

Cyclone System Behavior: International Weather Models

International meteorological research organizations including NOAA and European weather modeling centers, began predicting this cyclone system’s development well in advance of the IMD’s formal announcement. This early warning demonstrates the increasing sophistication of global weather prediction systems and the interconnected nature of modern meteorological science.

The system’s behavior aligns with typical post-monsoon cyclonic patterns in the North Indian Ocean, occurring during the October-November transitional period between monsoon and winter seasons. Historical data shows that West Bengal’s coastal regions have experienced increased cyclone frequency during recent decades, highlighting the region’s ongoing vulnerability to tropical storm systems.

Weather Safety and Preparedness Guidelines

Residents across West Bengal should take the following precautions during this weather system’s passage,

·       For Coastal and Neighboring Districts: Secure loose outdoor items, avoid unnecessary travel on Wednesday-Thursday and monitor official IMD bulletins for updated forecasts and warnings. Stay indoors during periods of heavy rain and thunderstorms.

·       For All West Bengal Residents: Despite no direct cyclone impact expected, the rain and gusty winds warrant normal seasonal precautions including umbrella carrying, avoiding waterlogged areas and monitoring local news updates. Power disruptions are possible in areas experiencing heavy rainfall.

·       For Winter Preparation: Given the delayed winter arrival, residents planning winter garment purchases or heating system maintenance should adjust timelines to focus on mid-December preparations rather than early November.

La Niña Conditions and Winter Outlook 2025-2026

Meteorological agencies have identified developing La Niña conditions in the equatorial Pacific Ocean that are expected to persist through the 2025-2026 winter season. La Niña typically correlates with colder winters across much of India, particularly in northern regions.

For West Bengal, La Niña conditions usually contribute to above-normal winter precipitation through the northeast monsoon (October-December period) and potentially colder minimum temperatures. Current forecasts suggest increased rainfall likelihood and temperature patterns slightly below normal averages during the winter months.

READ MORE: Powerful 5.5 Magnitude Earthquake Strikes Bangladesh - Tremors Shake Kolkata and West Bengal

Historical Context: Cyclone Patterns in Bay of Bengal

West Bengal’s coastal regions have experienced increasingly frequent cyclonic systems during recent decades, according to historical meteorological records. The state experiences two primary cyclone seasons: pre-monsoon (April-May) and post-monsoon (November-December) with post-monsoon cyclones traditionally being more frequent and intense.

The northern Bay of Bengal’s shallow bathymetry and landlocked coastal configuration create conditions favorable for rapid cyclone intensification and dangerous storm surge development. During the past 250 years, numerous severe cyclones have impacted West Bengal’s coastal districts, including Medinipur, South 24 Parganas and Hooghly.

Latest Updates from IMD and International Sources

The India Meteorological Department continues issuing six-hourly updates on this developing cyclone system. These forecasts are updated regularly as new observational data becomes available from satellite systems, buoys and coastal weather stations. Citizens are advised to monitor official IMD channels for the most current information.

International weather agencies including the United States Geological Survey National Weather Service continue providing parallel forecasts and warnings for comparative analysis. The consistency between Indian and international forecasts provides additional confidence in the predicted system development and track.

Conclusion: Prepare for Rain, Await December Winter

West Bengal residents should prepare for the immediate weather system bringing potential rainfall and gusty winds through Thursday. This cyclone system, while not directly impacting Bengal, represents a significant meteorological event affecting neighboring regions and creating indirect effects across the state. The system’s most important long-term impact is the delayed arrival of winter season to November, pushing established winter conditions to after December 10th.

For those anticipating winter’s crisp, dry conditions, patience is required as November will maintain relatively warm, humid atmospheric patterns. December will bring the expected harsh winter weather associated with the season. This transition timeline aligns with developing La Niña conditions expected to characterize the 2025-2026 winter season across much of India.

Call to Action (CTA): Stay Informed and Prepared

Follow and share The Daily Hints for continuous weather updates, forecasting information and seasonal guidance throughout the transitional weather period. Download the official IMD mobile application for real-time weather alerts specific to your location. Check local news sources regularly for updates on this developing cyclone system and its predicted impacts on West Bengal.

Monitor temperature trends and atmospheric conditions as the system progresses. Update your personal weather emergency kit as needed for the upcoming winter season preparations, now scheduled to intensify after December 10th. Share weather safety information with family, friends and colleagues to ensure community-wide preparedness during this transitional meteorological period.

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