The monsoon has advanced into more parts of coastal Andhra Pradesh, foothills and rest of West Bengal, and parts of Odisha, Jharkhand and Bihar on Wednesday.
The northern limit of the monsoon passed through Veraval, Surat, Sangli, Bellary, Nandyal, Visakhapatnam, Bhubaneswar, Bankura, Darbhanga and Raxaul.
A cyclonic circulation embedded into the trough linking Punjab with north-east Bay of Bengal is presiding over the rain in the East from its perch over Jharkhand.
On Wednesday, this land-based trough lain across Haryana, Uttar Pradesh, Jharkhand and Gangetic West Bengal.
The trough is expected to allow south-easterly monsoon winds from the Bay to enter North and North-West India.
Rains in foothills Bihar and east Uttar Pradesh will be the two major stops before the rains can filter into the rest of Uttar Pradesh, Delhi, Punjab, Rajasthan and Jammu and Kashmir.
The heavy rain expected along foothills of West Bengal and North-East India is forecast to progress along a narrow corridor onward into Uttar Pradesh and Uttarakhand until Monday, an outlook of the US Climate Prediction Centres aid. Plains of Bihar, Jharkhand, Chhattisgarh and east Madhya Pradesh, Odisha and coastal Andhra Pradesh may benefit from spill-over rain.
Growing deficit But the rest of central India and south Gujarat will hardly see any rain during the period.
Affected region include plains in Uttar Pradesh, west Madhya Pradesh and adjoining west and south Maharashtra.
The last week of the month (June 24 to 30) too may witness a similar scenario when it will be mostly Nepal and adjoining North-East India and the foothills which will receive the rains.
Rain-deficit areas will grow further into the north from central India and reach Rajasthan, apart from south Gujarat.
According to the US agency, the other area of enhanced convection and rain during the two weeks will be out into the sea over East Bay and adjacent Bangladesh, Myanmar and Thailand.