A weather warning valid for the next two days and issued by the India Meteorological Department (IMD) on Wednesday tends to take the heavy rain belt towards east and north-west India and along the west coast.
This is because there has been an upward shift in the alignment of the monsoon trough and resultant ‘dry-docking' of its eastern end even as its western end retained itself along the normal.
Persisting rain deficits in south peninsular India (3 per cent) and east and north-east India (15 per cent) have brought up the cumulative figure as a whole for the country by one per cent more to four per cent on Wednesday.
The eastern end of the monsoon trough was nestling in the north-eastern States on Wednesday evening but the IMD said that it would keep moving further north over the next two days.
A weather system has to develop over the Bay of Bengal in order to coax back the trough and get the eastern end to dip into the Bay of Bengal waters.
The IMD has forecast isolated heavy rainfall over the Jammu Division of Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Uttar Pradesh, sub-Himalayan West Bengal, Sikkim, Konkan, Goa, coastal Karnataka, Kerala, Lakshadweep and Andaman and Nicobar Islands.
WEATHER FEATURES
Upper air cyclonic circulations persisted over Saurashtra and Kutch, central Pakistan and adjoining northwest Rajasthan and Haryana and neighbourhood.
A parent western disturbance hung over Jammu and Kashmir and adjoining north Pakistan while a feeble offshore trough looked down from Gujarat coast to Kerala coast.
These systems brought widespread rainfall over the west coast, Kerala, Lakshadweep and the Andaman and Nicobar Islands during the 24 hours ending Wednesday morning.
The rains were fairly widespread over Vidarbha, north coastal Andhra Pradesh and Rayalaseema while being scattered over the western Himalayan region, the Northeastern States, sub-Himalayan West Bengal, Sikkim, Telangana, Tamil Nadu, interior Karnataka, west Uttar Pradesh and Delhi.
CONVECTIVE CLOUDS
A Kalpana-1 satellite cloud imagery on Wednesday afternoon showed convective clouds rising over parts of Jammu and Kashmir, Uttarakhand, west Rajasthan, Haryana and adjoining Punjab, Uttar Pradesh, Bihar, central and south Bay of Bengal, Andaman Sea and east Arabian Sea.