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Home >News >India >Cold wave conditions abate in Delhi as mercury rises slightly

New Delhi: New Delhi: The national capital, which braved the coldest day of December, got some respite on Tuesday as minimum temperatures increased slightly with dense fog giving way to sunlight.

According to India Meteorological Department (IMD), the minimum temperature on Tuesday rose by 2°C and was recorded at 4.8°C at the Safdarjung meteorological station. The minimum temperature at Palam was recorded at 4.1°C.

"No more cold wave is expected till January 4, 2020. But the cold days may persist," said the weather department. A cold day is declared when maximum temperature is less than or equal to 16°C and foggy conditions prevail which creates cold conditions for prolonged period.

Unlike a cold day, a cold wave is created due to wind chill which brings down the actual minimum temperature depending upon the wind speed. If wind chill effective minimum temperature (WCTn), which is basically the effective minimum temperature due to wind flow is 10°C or less, then a cold wave is declared.

“The minimum temperatures have shown a positive trend across various parts in North India, including Delhi. It may continue over the next two days, after which a brief of scattered rains is expected over Delhi," said Kuldeep Shrivastava, Head, Regional Weather Forecasting Centre, New Delhi, "however, cold wave persists in certain pockets of Punjab, Haryana and Uttar Pradesh."

The minimum temperatures during the last three days have remained around 1-3°C causing severe cold wave conditions across North India.

On Monday, the national capital witnessed the coldest day ever recorded in December in the last one century. The maximum temperature stood at the lowest ever of 9.4°C, which was 11.4°C below the normal temperature of 20.8°C. It surpassed the record of 11.3°C on December 28, 1997.

According to IMD scientists, the dense fog was the main reason for record breaking cold. “There was mixing of lower level warm and moist light south-easterly winds with dry and cold northwesterly winds from the mountains over Delhi which led to foggy conditions and thus, lowering of temperatures," said an IMD scientist.

In terms of total number of cold days, December has recorded 14 cold days so far, as against the highest of 17 days in December of 1997, which remains the coldest December, the national capital ever witnessed.

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