Deep depression weakens, south Bengal rain to ease from Sunday
Synopsis
The deep depression battering south Bengal since Wednesday is running out of steam — RMC Kolkata says no heavy rain warning is in place for south Bengal, including Kolkata, from Sunday. The system is expected to weaken into a low-pressure area by Saturday evening, though north Bengal and coastal areas remain on alert through the day.
Key Takeaways
The Regional Meteorological Centre (RMC), Alipore has issued no heavy rain warning for south Bengal, including Kolkata , from Sunday, 27 September onwards.
The deep depression over south Odisha and Chhattisgarh is expected to weaken into a low-pressure area by Saturday evening .
Gusty winds of 35–45 kmph , occasionally up to 55 kmph , continue along the Bengal coast; fishermen advised to stay ashore until Saturday afternoon .
Heavy rainfall warnings remain in place for Darjeeling, Jalpaiguri, Kalimpong, Alipurduar, Cooch Behar , and North Dinajpur on Saturday, with no extension from Sunday.
Kolkata recorded a minimum of 25.6°C — 0.4°C below normal — and a Friday maximum of 30.6°C , 1.9°C below normal.
The Regional Meteorological Centre (RMC) at Alipore, Kolkata, on Saturday, 26 September, confirmed that no heavy rainfall warning has been issued for south Bengal districts — including Kolkata — from Sunday onwards, as the deep depression over the region is expected to weaken into a low-pressure area by Saturday evening. The development brings significant relief to a region that has endured persistent heavy showers since Wednesday night.
Weather System Loses Steam
The deep depression, centred over south Odisha and Chhattisgarh, has tracked further northwestward while gradually losing intensity. According to the met office, rainfall activity across both south and north Bengal is expected to ease from Saturday evening, with no prospects of moderate to heavy rain over the next few days. A Met department official noted that rainfall in Kolkata and adjoining areas would decrease significantly from noon on Saturday, with only isolated light showers possible at one or two places.
Coastal Advisory Still in Effect
Despite the weakening system, sea conditions along the Bengal coast remain rough. Gusty winds of 35–45 kmph, occasionally spiking to 55 kmph, are continuing along the coastline. Fishermen have been advised not to venture into the sea until Saturday afternoon, as the lingering impact of the weather system keeps conditions hazardous offshore.
North Bengal Still on Alert This Saturday
While south Bengal gets a reprieve, parts of north Bengal remain under watch for the day. Heavy rainfall warnings are in place for Darjeeling, Jalpaiguri, and Kalimpong districts on Saturday. Thunderstorm and rainfall warnings have also been issued for Alipurduar, Cooch Behar, and North Dinajpur. Notably, no weather warnings have been extended for any north Bengal district from Sunday onwards, suggesting a broad improvement across the state.
Kolkata Temperatures Below Normal
Kolkata recorded a minimum temperature of 25.6 degrees Celsius on Saturday, 0.4 degrees below normal. The maximum temperature on Friday stood at 30.6 degrees Celsius, 1.9 degrees below normal — a reflection of the prolonged cloud cover and rain that has gripped the city since mid-week. This is consistent with patterns seen during active low-pressure systems that draw moisture off the Bay of Bengal.
What to Expect Next
With the deep depression set to dissipate, meteorologists expect a gradual return to drier conditions across the Bengal plains through early next week. Residents and commuters in Kolkata and surrounding districts can expect significant improvement in weather from Sunday, though coastal communities should remain vigilant until sea conditions normalise.
Point of View
But the episode underscores how vulnerable Kolkata and the broader Bengal coastline remain to Bay of Bengal weather systems each monsoon season. The continued rough seas and coastal wind advisories — even as the depression weakens — highlight that the tail-end of such systems can be just as dangerous for fishing communities as the peak. Authorities would do well to use this brief window before the next system to assess urban drainage stress in Kolkata, which repeatedly floods under sustained rain. The pattern of deep depressions forming over the Bay and tracking northwest through Odisha is well-established; early-warning infrastructure and community preparedness need to match the meteorological science.
NationPress
26 Sept 2026
Frequently Asked Questions
Will it rain in Kolkata on Sunday, 27 September?
No heavy or moderate rain is expected in Kolkata from Sunday onwards, according to the RMC Alipore. Only isolated light showers remain possible at one or two places, with no formal weather warning issued for any south Bengal district.
What happened to the deep depression affecting Bengal?
The deep depression, centred over south Odisha and Chhattisgarh, has moved further northwestward and is gradually losing strength. It is expected to weaken into a low-pressure area by Saturday evening, reducing rainfall intensity across both south and north Bengal.
Which north Bengal districts are still on weather alert?
Heavy rainfall warnings remain in place for Darjeeling, Jalpaiguri, and Kalimpong on Saturday. Thunderstorm and rainfall warnings also cover Alipurduar, Cooch Behar, and North Dinajpur. However, no weather warnings have been issued for any north Bengal district from Sunday onwards.
Is it safe for fishermen to go to sea along the Bengal coast?
Fishermen have been advised not to venture into the sea until Saturday afternoon, as gusty winds of 35–45 kmph — occasionally reaching 55 kmph — continue along the coast. Sea conditions remain rough due to the lingering impact of the weather system.
How has the deep depression affected Kolkata's temperatures?
Kolkata recorded a minimum temperature of 25.6°C on Saturday, 0.4°C below normal, and a Friday maximum of 30.6°C, which was 1.9°C below normal. The sustained cloud cover and heavy rain since Wednesday night have kept temperatures depressed across the city.
