A deep depression over the northwest Bay of Bengal crossed the West Bengal-Bangladesh coast near Raidighi on the morning of May 29, 2025, bringing with it widespread heavy rainfall and squally winds. The India Meteorological Department (IMD) reported that the system moved inland between 10:30 am and 11:30 am, between Sagar Island and Khepupara.
The weather system is expected to move north-northeastwards and gradually weaken into a depression by the evening. However, its impact will continue to be felt across large parts of eastern and northeastern India. The IMD has forecast extremely heavy rainfall in Meghalaya on May 30, with isolated areas likely to see over 30 centimetres of precipitation. Assam is also bracing for extreme rainfall, with forecasts of over 20 cm in some places.
The deep depression is influencing weather patterns beyond the immediate impact zone. Heavy to very heavy rain is likely in Nagaland, Manipur, Mizoram, Tripura, Arunachal Pradesh, Sub-Himalayan West Bengal, and Sikkim from May 29 to 30. Coastal and inland areas of Gangetic West Bengal and Odisha are expected to receive 7–20 cm of rain, accompanied by squally winds gusting up to 70 km/h. The sea remains rough to very rough along the Odisha, West Bengal, and Bangladesh coasts, prompting warnings for fishermen to avoid venturing out.
Western coastal states are also on high alert. Extremely heavy rainfall is forecast in Tamil Nadu, coastal Karnataka, and southern interior Karnataka on May 29. Kerala and Mahe are likely to experience similar conditions on both May 29 and 30. Heavy to very heavy rainfall is also expected in Konkan and Goa on May 29.
The storm system’s effects extend into central and northern India as well. Thunder squalls with wind speeds of up to 70 km/h are predicted in parts of Madhya Pradesh, Chhattisgarh, Rajasthan, Punjab, Haryana, Delhi, and Uttar Pradesh between May 29 and 30. Heavy rain is also likely in Vidarbha, Chhattisgarh, Bihar, and Gangetic West Bengal through May 30.
In the northwest, heavy rainfall is forecast in Jammu & Kashmir, Himachal Pradesh, and Uttarakhand between May 30 and June 2. Dust storms may sweep across parts of West Rajasthan on May 29 and 30, with heatwave conditions expected in isolated pockets of the region on May 30 and 31.
Meanwhile, the southwest monsoon has made significant progress, advancing into parts of Odisha, Chhattisgarh, the North Bay of Bengal, the northeastern states, Sub-Himalayan West Bengal, and Sikkim. Further advancement into more areas of West Bengal and Bihar is expected within the next couple of days.
The evolving weather pattern marks a turbulent transition into the monsoon season, with intense rainfall and wind events affecting multiple regions across the country.