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Rainfall situation in parts of north-west India has improved after productive visitations by weather-making western disturbances.
Western disturbance are low-pressure waves originating as far away as from the Mediterranean and travelling east over Iran, Iraq, Afghanistan and Pakistan.
SURPLUS RAIN These ‘atmospheric disturbances’ are the main generating systems (rain or snow) over north-west India during an otherwise still and cold winter.
India Met Department says that east Rajasthan, Delhi, Uttar Pradesh, east Gujarat, west Madhya Pradesh and Madhya Maharashtra have recorded surplus rain until now. Jammu and Kashmir, along with Bihar, is in the normal category.
But rain has been deficient in Saurashtra, Punjab, Uttarkhand, Haryana, Jharkhand and Kerala while being ‘scanty’ in as many as 16 Met subdivisions.
Most of the scanty subdivisions fall in the eastern parts of the country, including peninsular east and entire North-East. The situation in this region may see a reversal from the weekend as a fresh and well-endowed western disturbance enters the northwest and passes to the East.
It is well-endowed in terms of the moisture it may mop up from north Arabian Sea and carried inland by associated winds into North-West and progressively east India.
As the winds blow towards the east coast of India and sweeps the Bay of Bengal, additional moisture gets piped into east and north-east India.
THUNDER ACTIVITY Confluence of winds over land and from the sea will generate thunder activity and rain across entire eastern half of north India as well as eastern parts of peninsula. The Met has forecast rain or snow at many places over western Himalayan region from Thursday. Rain or thundershowers may lash a few places over plains of North-West and over central India.
Confluence of wind and moisture incursion from Bay of Bengal would cause rain or trigger thunderstorms over east and north-east India from Friday, the Met added.
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