Breaking a jinx that lasted a year, the Bay of Bengal lobbed in a monsoon depression on Thursday, promising to rev up monsoon over eastern India.
India Meteorological Department (IMD) said in an evening update that the depression over North Bay of Bengal remained practically stationary all day and lay centred 150 km southeast of Kolkata.
It was expected to move northwestwards and cross West Bengal-Bangladesh coasts about 50 km east of Sagar Islands by the same night.
A weather warning issued by the IMD said that heavy to very heavy rainfall would occur at a few places over north Orissa, coastal West Bengal and Jharkhand during the next two days.
It would be isolated heavy over south Orissa, interior West Bengal, Chhattisgarh, Konkan, Goa, coastal Karnataka and the Andaman and Nicobar Islands during this period.
IMD assessed conditions as favourable for further advance of monsoon over some more parts of Maharashtra, remaining parts of Telangana, Bihar, Jharkhand, Orissa and Chhattisgarh, some parts of east Madhya Pradesh and east Uttar Pradesh during next three days.
An afternoon satellite picture showed rain-bearing clouds rising over parts of Orissa, Gangetic West Bengal, Jharkhand, Chhattisgarh, north coastal Andhra Pradesh, the Northeastern States, east Uttar Pradesh, Bihar, Madhya Pradesh, Kerala, north Bay of Bengal, north Andaman Sea and East Arabian Sea.
A trough ran from Punjab to North Bay of Bengal across Uttar Pradesh and Jharkhand. In combination with the advancing depression, which is likely headed to the west across north peninsular and adjoining central India, it would set up an area of enhanced precipitation through the weekend.
Meanwhile, other weather-setting formations ranging from the offshore along the west coast from Karnataka coast to Kerala coast to upper air cyclonic circulations over Punjab and east Uttar Pradesh persisted.
A weather warning said that isolated thunder squalls may break out over Punjab, Haryana, Rajasthan and Uttar Pradesh during the next two days.
A short-term forecast valid until Sunday said that the widespread rain or thundershowers would continue over Orissa, Gangetic West Bengal and Jharkhand.
Fairly widespread rain or thundershowers has been forecast over the west coast, interior Karnataka, Lakshadweep, the Andaman and Nicobar Islands, the Northeastern States, the rest of east India, Vidarbha, Chhattisgarh and east Madhya Pradesh.
It would be scattered over Himachal Pradesh, Uttarakhand, Uttar Pradesh, west Madhya Pradesh and north coastal Andhra Pradesh. Isolated rain or thundershowers may occur over the rest of the country.