Delhi: Dense fog, cold wave may prevail until New Year in national capital

The minimum will drop to 6 degrees Celsius on Saturday and further to 4 degrees Celsius by Monday (January 2), the IMD forecast.

PTIUpdated: Thursday, December 29, 2022, 10:24 AM IST
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Dense fog in North India | Photo / AFP

New Delhi: Cold wave and cold day conditions are predicted to wallop parts of Delhi on New Year's eve and the winter chill would intensify further in early January, the India Meteorological Department (IMD) has said.

Cold conditions have abated in north India, including Delhi, for now under the influence of a western disturbance, characterised by warm moist winds from the Middle East.

However, the minimum will start dropping again from December 31, meteorologists said.

Minimum temperature to slip to 4 degrees

The minimum will drop to 6 degrees Celsius on Saturday and further to 4 degrees Celsius by Monday (January 2), the IMD forecast.

On Thursday, the Safdarjung observatory, Delhi's primary weather station, recorded a minimum temperature of 7 degrees Celsius against 6.3 degrees Celsius on Wednesday, 5.6 degrees on Tuesday and 5 degrees on Monday.

The maximum temperature is likely to settle around 23 degrees Celsius.

Several trains delayed

Fourteen trains to Delhi were reported to be running late due to dense to very dense fog in other areas, a Railways spokesperson said.

Weather experts said frigid north-westerly winds and reduced sunshine due to foggy weather had caused the spell of cold wave and below-normal day temperatures in northwest India.

A western disturbance led to a fresh spell of snowfall in the mountains on December 25-26 and cold northwesterly winds swept through the plains after its retreat.

A similar phenomenon involving a fresh WD will lead to intense chill in early January, they said.

A cold day is when the minimum temperature is less than or equal to 10 degrees Celsius below normal and the maximum temperature is at least 4.5 degrees below normal. A severe cold day is when the maximum is 6.5 degrees or more below normal.

According to the IMD, 'very dense' fog is when visibility is between 0 and 50 metres, 51 and 200 metres is 'dense', 201 and 500 'moderate', and 501 and 1,000 'shallow'.

In the plains, the Met office declares a cold wave if the minimum temperature dips to four degrees Celsius or when the minimum temperature is 10 degrees Celsius or below and is 4.5 notches below normal.

A severe cold wave is when the minimum temperature dips to two degrees Celsius or the departure from normal is more than 6.4 degrees Celsius.

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