The southwest monsoon is showing signs of a fresh revival as a well-marked low-pressure area over the Bay of Bengal moves inland, bringing the possibility of another spell of rain across eastern, central and northern India in the first week of September.
The India Meteorological Department (IMD) said the weather system is currently positioned over Gangetic West Bengal, adjoining areas of north coastal Odisha and the northwest Bay of Bengal. It is expected to move west-northwestwards over the coming days.
Heavy rain likely in eastern and central India
The strongest rainfall activity is expected over Odisha, Chhattisgarh, Gangetic West Bengal and Jharkhand.
The IMD has forecast heavy to very heavy rainfall over Gangetic West Bengal and Jharkhand on August 31, while Odisha and Chhattisgarh are expected to receive heavy rain through September 1.
Isolated extremely heavy rainfall has also been forecast over Odisha and Chhattisgarh during the period.
The weather system is expected to continue influencing the region even after September 1. West Madhya Pradesh could see fairly widespread to widespread rainfall between September 2 and 5.
Rain returns to northern India
The low-pressure system, along with the monsoon trough, is also expected to keep parts of northern India wet.
Isolated to scattered rainfall has been forecast over Haryana, Chandigarh, Delhi, Punjab and West Uttar Pradesh between August 31 and September 5.
East Uttar Pradesh is likely to remain particularly wet, with heavy rainfall expected through September 5 and isolated very heavy rain possible on August 31.
West Uttar Pradesh is also expected to receive heavy rainfall during the first week of September.
For Delhi and the surrounding northern plains, the forecast suggests that the monsoon is unlikely to retreat immediately. Intermittent rain could continue during the opening days of September, although rainfall intensity will vary across locations.
Monsoon enters its final month
September marks the final month of India's southwest monsoon season. However, the expected revival is not likely to be uniform across the country.
Eastern, central and parts of northern India are expected to receive a larger share of the rainfall, while conditions will remain uneven elsewhere.
The monsoon trough currently extends from Amritsar through northern India towards the well-marked low-pressure area over Gangetic West Bengal and adjoining Odisha.
The developing system could therefore deliver a wetter start to September for several states, even as the overall monsoon rainfall pattern remains uneven across India.
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