• Mandira Chatterjee
• 10 Oct, 2025

§  Bengal weather update cyclone alert

§  Bengal winter prediction La Nina effect

§  West Bengal rain forecast storm warning

§  Kolkata weather today monsoon withdrawal

Major weather changes are heading to Bengal.! Cyclonic circulation is building over South Bangladesh while North Odisha faces another weather system, triggering widespread rain alerts across the region. Weather experts confirm monsoon withdrawal is set to begin soon with North Bengal potentially seeing clear skies by October 12, followed by South Bengal around October 19. This weather transition brings both immediate rain concerns and exciting winter predictions for the months ahead.

·       Weather System Details & Current Conditions

o   Cyclonic Activity

-        A significant cyclonic circulation has formed over South Bangladesh, creating weather instability across the region. Simultaneously, another cyclonic system is active over North Odisha, combining to produce light to moderate rainfall in several South Bengal districts. Weather monitoring stations confirm no heavy rainfall threats currently exist for South Bengal but scattered thunderstorms with lightning will continue through Saturday.

·       Affected Districts Today (Friday)

o   High Impact Zones: North & South 24 Parganas, East & West Medinipur, Jhargram, Howrah, Nadia, East Burdwan

o   Orange Alert Issued: Nadia and both 24 Parganas districts face gusty winds reaching 30-40 kmph

o   Rainfall Probability: Light to moderate showers with thunderstorms across nine districts

·       Monsoon Withdrawal Timeline

o   North Bengal: Monsoon retreat expected by October 12 (Sunday)

o   South Bengal: Complete withdrawal anticipated by October 19

o   Western Districts: Monsoon may exit from western South Bengal districts by Tuesday

o   Weather scientists require three key conditions for official monsoon withdrawal: 3-4 consecutive rain-free days, reduced atmospheric moisture and wind direction reversal from Bay winds to dry northern winds.

·       Regional Weather Breakdown

o   Other States

Bihar and Jharkhand will experience dry weather conditions starting Saturday with monsoon withdrawal beginning in several areas. Odisha and Bengal require additional waiting time before monsoon departure. Post-Sunday, atmospheric moisture levels will gradually decrease, leading Bengal toward dry weather conditions next week.

Quotes from Weather Experts

·       “Monsoon withdrawal from North Bengal should begin by October 10 under normal conditions but current moisture levels suggest a delay of several days,” stated Dr. H.R. Biswas, head of Regional Meteorological Centre Kolkata.

·       “The current rain activity is caused by an upper air circulation over Bangladesh within the monsoon flow, creating ongoing shower conditions,” explained IMD officials in recent bulletins.

·       Winter & Cyclone Predictions

o   Cyclone Mantha Formation
Between October 27 and November 4, a cyclone named Mantha may develop in the northeast Bay of Bengal. This system, combined with November low-pressure formations, could trigger the first winter spell from early December.

o   Severe Winter Forecast
Long-term meteorological outlooks indicate harsh winter conditions ahead for Bengal. La Niña effects and negative Indian Ocean Dipole patterns may cause severe cold in Bankura district. Temperatures in Bankura’s Biharinath and Susunia hills could drop to 3-5°C, while Purulia and Paanagarh may see 5-7°C, competing with northern districts like Darjeeling and Kalimpong.

o   Clear Sky Benefits

After October 15, mountain skies will likely remain crystal clear for at least 8 days. Kanchenjunga visibility will be excellent from vast North Bengal areas and Sikkim during this period. This represents a major tourist opportunity, as the world’s third-highest peak becomes clearly visible from distances up to 100 kilometers away.

Read More: Shocking Discovery: Your Inhaler Might Be Polluting More Than 50,000 Cars.!

Impact Analysis

·       Immediate Concerns

o   Traffic disruption due to waterlogging in low-lying areas

o   Lightning strike risks in open fields

o   Potential power outages from thunderstorms

o   Agricultural impact on standing crops

·       Positive Developments

o   Clear mountain views for tourism boost

o   Monsoon surplus benefits agriculture

o   Better air quality enabling long-distance visibility

o   Reduced pollution levels creating clearer skies

·       Temperature Predictions

o   From October 20, minimum temperatures will begin dropping in North Bengal over the following week. Hill stations and Dooars regions will experience early winter atmosphere. December and January forecasts show intense cold conditions for Purulia and Bankura districts with La Niña and negative IOD effects potentially causing bone-chilling winters in Bankura.

Conclusion

Bengal stands at a critical weather transition point with cyclonic activity providing the final monsoon push before clear skies and harsh winter conditions arrive. The next two weeks will determine monsoon withdrawal success, while residents should prepare for both immediate thunderstorm impacts and an exceptionally cold winter season ahead. Weather monitoring remains crucial as multiple systems influence regional conditions.

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