Kolkata Weather Update March 2026: Kolkata and several parts of West Bengal are witnessing a sudden shift in weather patterns this March, with the India Meteorological Department (IMD) issuing alerts for thunderstorms, rain, and strong winds. The development marks the early arrival of pre-monsoon storm activity, locally known as Kalbaisakhi or nor’westers.
Kolkata Weather Update March 2026 – Overview
| Category | Details |
|---|---|
| Alert Type | Orange Alert (IMD) |
| Affected Region | Kolkata & South Bengal |
| Other Impact Areas | North Bengal districts (heavy rain) |
| Weather Condition | Thunderstorms, Lightning, Rain |
| Wind Speed | 50–70 km/h (gusty winds) |
| Rainfall Intensity | Light to Moderate (Heavy in North Bengal) |
| Storm Type | Nor’wester (Kalbaisakhi) |
| Peak Time | Afternoon to Evening |
| Duration | Next 2–3 Days |
| Temperature Impact | Sudden drop after storms |
| Risk Factors | Waterlogging, Traffic Disruption, Low Visibility |
| Advisory | Stay indoors, avoid trees, secure loose items |
Orange Alert Issued for Kolkata
The IMD has issued an orange alert for Kolkata on March 20, warning residents of unstable weather conditions throughout the day. The forecast includes:
- Thunderstorms with lightning
- Gusty winds
- Light to moderate rainfall
These conditions may lead to reduced visibility, traffic disruptions, and waterlogging in low-lying areas, prompting authorities to advise caution.
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Nor’wester (Kalbaisakhi) Activity Intensifies
Meteorologists have predicted back-to-back nor’wester spells across Kolkata and nearby districts such as Howrah, North 24 Parganas, and South 24 Parganas. These storms are expected to continue over the next couple of days.
- Wind speeds may reach 50–70 km/h
- Sudden thunderstorms likely in afternoon or evening hours
- Temperature expected to dip after storms
This weather pattern is driven by moisture incursion, rising temperatures, and favorable wind conditions over the region.
Recent Storms Signal Early Season Shift
Kolkata has already experienced strong pre-monsoon activity earlier this week. A powerful thunderstorm brought:
- Wind gusts up to 72 km/h
- Heavy rainfall for over an hour
- Sudden drop in temperature
- Waterlogging in several areas
Such intense storms typically occur in April–May, but this year’s early onset suggests a changing weather trend.
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Impact Across West Bengal
The weather system is not limited to Kolkata. Several districts across West Bengal are on alert:
- North Bengal: Heavy rainfall expected in some areas
- South Bengal districts: Thunderstorms and squally winds likely
- Districts like Purulia, Bankura, and Burdwan may also see increased rainfall activity
The IMD has indicated that thunderstorms and lightning may continue intermittently over the coming days, affecting daily life and travel.
Nationwide Weather Pattern
The current weather instability is part of a broader system affecting multiple regions across India. The IMD has issued alerts for several states, indicating:
- Widespread thunderstorms
- Rainfall across eastern and northeastern India
- Changing wind patterns linked to western disturbances
Kolkata remains one of the key urban centers impacted by this system.
Safety Advisory for Residents
Authorities have urged citizens to stay alert and follow basic precautions:
- Avoid sheltering under trees during storms
- Stay indoors during lightning activity
- Secure loose objects on rooftops or balconies
- Expect traffic delays during heavy rain
What to Expect Next
Weather experts suggest that:
- Thunderstorm activity may continue for 2–3 days
- Temperatures will temporarily drop
- Conditions may stabilize slightly afterward before rising again
The early arrival of Kalbaisakhi signals an active pre-monsoon season ahead for Kolkata and West Bengal.
Affected Areas in West Bengal (March 2026 Weather Alert)
South Bengal (High Impact Zone)
- Kolkata
- Howrah
- Hooghly
- North 24 Parganas
- South 24 Parganas
- East Midnapore (Purba Medinipur)
- West Midnapore (Paschim Medinipur)
- Jhargram
- Bankura
- Purulia
- East Burdwan (Purba Bardhaman)
- West Burdwan (Paschim Bardhaman)
- Nadia
👉 These areas are under Orange / Yellow alerts, especially during afternoon and evening hours due to Kalbaisakhi storms.
North Bengal (Heavy Rainfall Zone)
- Darjeeling
- Kalimpong
- Jalpaiguri
- Alipurduar
- Cooch Behar
- North Dinajpur
- South Dinajpur
- Malda
👉 Some areas here could see continuous rain spells, especially in hilly and sub-Himalayan regions.
Key Impact Locations (Urban Focus)
- Kolkata city → Thunderstorms, lightning, traffic disruption
- Salt Lake & New Town → Gusty winds, sudden rain
- Howrah & Hooghly industrial belt → Storm + reduced visibility
- Coastal belt (Digha, Kakdwip) → Strong winds + rain
Timing of Impact
- Peak hours: Afternoon to late evening
- Duration: Next 2–3 days (March 20 onward)
- Pattern: Sudden storms followed by temporary cooling
Quick Summary
- South Bengal: Thunderstorms + strong winds
- North Bengal: Heavy rainfall + storm activity
- Kolkata: Under Orange Alert (high impact expected)
Conclusion
March 2026 has brought an unusual and intense start to the pre-monsoon season in Kolkata. With IMD issuing an orange alert and forecasting multiple thunderstorm spells, residents should stay cautious. While the rain offers relief from rising temperatures, the accompanying strong winds and lightning pose risks that cannot be ignored.
