The Hindu Business Line : More rains expected for northwest by weekend

Thiruvananthapuram, Jan. 14 The next round of precipitation in the hills and over the plains in northwest India is expected to materialise from Thursday with the eastward movement of a western disturbance.

An India Meteorological Department (IMD) forecast said the causative western disturbance would hit northwest India through the weekend causing scattered to fairly widespread precipitation over the hills and isolated to scattered rain/thundershowers over adjoining northern plains.

STRONG WINDS

This shift in weather would be brought about as the ongoing bout of violent weather marked by strong north-westerly winds dies down over the Indo-Gangetic plains. The winds have already started lashing the plains over east and east-central India, and would continue to prevail over the next two days, even as thundershowers wallop Arunachal Pradesh towards the extreme northeast.

Both day and night temperatures are generally 1-2°C below normal over many parts of northern and adjoining central India. But they are likely to increase by 2-4°C as the steaming head of the western disturbance pushes into the region.

RAIN AND SNOW

Isolated rain/snowfall is likely over Jammu & Kashmir and Himachal Pradesh from Thursday, while isolated rain/thundershowers are likely over Punjab and northern Haryana. But, according to the US National Centres for Environmental Prediction (NCEP) and the Ensemble Forecasting System (EFS) of the US Military, the rains may also progressively cover northern Rajasthan, Chandigarh-Delhi, and parts of west Uttar Pradesh.

This is expected to happen as an upper air cyclonic circulation, which some models venture to project as an induced ‘low’, gets embedded into the westerly trough.

The moisture feed flowing in from the Arabian Sea would get dumped over the plains as the trough impacts the western Himalayas.

Meanwhile, the southernmost peninsula may get to see some activity from a brewing storm south of the Comorin area by the weekend or the early next. The storm will get clasped into the Inter Tropical Convergence Zone (ITCZ) currently located just to the south of Sri Lanka and would be fed by a strong seasonal moisture feed from the southwestern Pacific.

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