Chilly spell in Delhi-NCR intensifies, no relief till Dec 21: IMD – india news

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The bloodless spell in Delhi further intensified on Thursday, as the maximum temperature dropped to 15.2 degrees Celsius, seven degrees below normal, which was once exacerbated by fast icy winds blowing through the day, leaving city residents shivering.

A departure of seven degrees from normal meant that the India Meteorological Branch (IMD) categorised Thursday as a “severe bloodless day”. This was once the fourth consecutive “bloodless” or “severe bloodless day”, with weather scientists predicting no relief over the weekend.

Minimum temperature of the day was once recorded around 8.30am on Thursday — 4.6 degrees Celsius, four degrees below normal. Which means the hole between maximum and minimum temperature on Thursday was once only around 10 degrees Celsius.

Scientists say temperature numbers alone aren’t ready to capture the bitter chill the general public are experiencing through the day because the “insight of the temperature” is likely even lower because of the icy bloodless winds. For instance, the “feels like” temperature of Thursday’s minimum temperature is around two-to-three degrees Celsius.

“The ‘feels like’ temperature is much lower as a result of the icy bloodless winds that are blowing at 15 to 20 kmph. We don’t expect relief from the bitter bloodless till December 21. A western disturbance is approaching around that time which will not have much affect on the plains. But the relief will be marginal, an increase of only one-to-two degrees Celsius,” explained Mahesh Palawat, vice-president, climate change and meteorology at Skymet Weather.

The ‘feels like’ temperature takes into account wind speeds and humidity to evaluate how the human body if truth be told feels temperature. “For instance in winter a strong wind can feel much colder than the measured temperature would indicate. Conversely on a humid day in summer it can feel uncomfortably hotter than the air temperatures would propose on their own,” explains the United Kingdom Met Office.

Many stations in northwest India recorded extremely low minimum temperatures on Thursday — Churu recorded 2.2°C; Bikaner 3.1°C; Mt Abu -1°C; Sikar 0.5°C; Bareilly 3.3°C; Delhi Ridge 3.5°C; Narnaul 2.6°C; Ranichauri -1.4°C; and Gulmarg -11°C. Day temperatures were also unusually low — on Wednesday (maximum temperature data has been tabulated for Wednesday) Jammu recorded 14.4°C; Kathua 10; Keylong 3.3; Dalhousie 1.5; Amritsar 8.2; Bathinda 10; Hisar and Karnal at 15; Churu 16; Ganganagar 13.4.

“Icy winds are blowing from the snow-clad mountains towards Delhi now. Around December 15 to 20 climatologically also we see a sharp fall in temperatures as sun rays are falling somewhat slanted and not vertical. There may be uplifted fog in some regions over northwest India which may be not allowing the surface to warm up all through the day. Overall the icy winds because of heavy snow cover over Himalayas are the primary driver for extremely bloodless days,” explained Kuldeep Shrivastava, head, regional weather forecasting centre.

IMD had warned on Wednesday that “bloodless wave” to “severe bloodless” conditions may have a variety of serious impacts on health that shouldn’t be ignored. There is an increased likelihood of more than a few illnesses like flu, stuffy nose or nosebleed, shivering which is a first signal of the body losing heat. Prolonged exposure to extreme bloodless can cause frostbite, which results in the skin turns pale, tough and numb and eventually black blisters appear on exposed body parts such as fingers, toes, nose and or earlobes. Severe frostbite needs instant medical attention and remedy.

The impact-based warning issued by IMD for bloodless wave recommends that people wear insulated shoes, moisturise skin, increase vitamin C intake, limit out of doors activities, deal with ventilation while the usage of heaters, keep away from drinking alcohol as it reduces body heat etc.

Some of those exposed to dense fog could also suffer health impacts. Dense fog contains particulate matter and other pollutants which can get lodged in the lungs leading to episodes of wheezing, coughing and shortness of breath. Those with asthma and bronchitis are especially vulnerable.

According to IMD, a “bloodless day” or “severe bloodless day” is regarded as based on two parameters — a minimum temperature of under 10 degrees Celsius and maximum temperature that is 4.5 degrees Celsius or 6.4 degrees Celsius below normal respectively.

A bloodless wave occurs in plains when the minimum temperature is 10 degrees Celsius or below and/or is 4.5 notches lesser than the season’s normal for two consecutive days. Bloodless wave may be declared when the minimum temperature is less than 4 degree C in the plains. Witnessing a bloodless day and bloodless wave together means the hole between day and night temperatures was once lower than normal.

“Bloodless wave to severe bloodless wave” conditions are very likely in some pockets over Punjab, Haryana, Chandigarh, West Uttar Pradesh and north Rajasthan all through next three days and decrease thereafter according to IMD’s bulletin. “Bloodless day to severe bloodless day” conditions are likely in some pockets over Punjab, Haryana, Chandigarh and Delhi, north Rajasthan and northwest Uttar Pradesh all through next two days and decrease thereafter. Dense fog is likely in some pockets over Assam, Meghalaya, Tripura and Mizoram all through next three days.

“There was once heavy and widespread snowfall in the Western Himalayas from December 11 to 13 and then dense fog started being recorded in many places which has led to bloodless day conditions. Because of extremely chilly winds, we have issued an impact-based warning for the first time which tells people what to do all through bloodless wave and bloodless day conditions,” added RK Jenamani, senior scientist, national weather forecasting centre.

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