As minimum temperatures dropped to 3.2 degrees Celsius, Delhi is facing an intense cold wave. The dense fog has reduced visibility, slowed traffic and delayed hundreds of flights and trains. However, respite is not so far as the weather department expects the cold wave to subside from 10 January
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 "Explained: Why Delhi is colder than Himachal and Uttarakhand (1)")
Delhi is reeling under an intense cold wave that has gripped northern India.
For the fifth consecutive day on Monday (9 January), the National Capital recorded minimum temperatures lower than those seen in some areas of Himachal Pradesh and Uttarakhand.
The dipping mercury and a deep blanket of fog have affected the reopening of schools as well as the movement of traffic, flights and trains.
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How severe is the cold wave in Delhi? Why have minimum temperatures in the National Capital plummeted below those in hill stations? Let’s take a closer look.
Cold wave in Delhi
A thick fog engulfed Delhi today, reducing visibility to just 25 metres and worsening the air quality which reached “severe” category in the city.
India’s weather agency declares a cold wave when the minimum temperature is below four degrees Celsius.
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Delhi fog became one of the top trends on Twitter, with people sharing pictures of a dense layer of fog.
This is what Delhi/NCR looks like at 8.30am today. The temperature outside is 9 degrees 🌬️ #delhifog #Delhi pic.twitter.com/mykJegG7gO
— Debajani Mohanty (@debimr75) January 9, 2023
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Take care #delhifog #winters pic.twitter.com/Yrqcg8NHNu
— Dr. Ankita Kakkar 🩺 (@AnkitaKakkar) January 9, 2023
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According to an India Meteorological Department (IMD) official, the fog decreased visibility level to 50 metres at the Palam observatory, near the Indira Gandhi International Airport, and 25 metres at the Safdarjung observatory and the Ridge weather station, reported news agency PTI.
As per Satellite imagery and available visibility data fog layer extended from Punjab and adjoining northwest Rajasthan to Bihar across Haryana, Chandigarh & Delhi and Uttar Pradesh. pic.twitter.com/OGB3tEBNZR
— India Meteorological Department (@Indiametdept) January 9, 2023See Also::Seasons of Delhi ::Hottest Countries in the World 2024Abu Dhabi vs Dubai: What People Think vs The Truth • Arabian NotesNew Delhi vs London, England Climate & Distance Between
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As per the NDTV report, the minimum temperature logged at Safdarjung observatory was 3.8 degrees Celsius in the morning, slightly higher than the 1.9 degrees reported on Sunday – the lowest in January in the past two years and the second lowest in the month since 2013.
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The minimum temperatures at weather stations in Lodhi Road, Ayanagar and Ridge stood at 3.6 degrees, 3.2 degrees and 3.3 degrees, respectively.
The mercury in the National Capital dipped below most hill stations in Himachal Pradesh and Uttarakhand, such as Manali and Nainital (six degrees each), Dehradun (6.5 degrees), Chamba (8.7 degrees), Dalhousie (nine degrees), Dharamshala (9.2 degrees), Shimla (10.3 degrees), Kangra (8.9 degrees), Mussoorie (11.3 degrees), Mukteshwar (7.6 degrees) and Tehri (9.2 degrees), reported PTI.
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ALSO READ:How severe is the cold wave in North India?
How cold wave has hit Delhi
Schools, which were to open today, have been closed in the National Capital till 15 January in view of the severe cold wave.
Hundreds of flights have been delayed and trains cancelled amid the heavy fog.
“A total of 267 trains were cancelled today due to fog and other conditions. Till 11 am, a total of 170 trains were running late and out of 170 trains, 91 trains (54 per cent) were running late due to weather conditions,” the Railways said in a statement, as per ANI.
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NDTV report said that over 150 domestic flights had to be postponed due to the bad weather.
Earlier in the morning, the Delhi Airport issued an alert, saying flight operations may be affected due to “dense fog”.
Update issued at 09:00 hours.
— Delhi Airport (@DelhiAirport) January 9, 2023
Attention Flyers!!#Fog #FogAlert #DelhiAirport pic.twitter.com/mJdzvGDeYt
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Domestic airline IndiGo asked passengers to check their flight status before leaving for the airport as the timings were impacted “due to dense fog and poor visibility” in Delhi.
Every year, thousands of homeless people in Delhi are among the worst affected due to the bone-chilling cold. Under the Winter Action Plan this time, the Delhi government has set up 15 rescue teams to bring homeless people to night shelters, as per Outlook.
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However, the accommodation in shelters is insufficient compared to the number of homeless persons in the National Capital.
“Overcrowding is a big problem. Because of too much footfall, some people sleep on the roadside,” Sunil Kumar Aledia of the Centre for Holistic Development told Associated Press (AP).
ALSO READ:North India cold wave: IMD issues red alert for Delhi, Punjab, Haryana and UP for next 48 hours
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IMD’s warnings
The IMD warned people of road accidents due to heavy fog and advised them to drive carefully.
The weather department also urged people to “avoid or limit outdoor activities” until the mercury improves.
As per PTI, the IMD alerted that long-term exposure to dense fog may prompt respiratory issues in people suffering from asthma bronchitis and other lung-related health problems.
Why is Delhi colder than hill stations?
Meteorologists blame the increased gap between two western disturbances for the long spell of intense cold afflicting northern India.
“The long cold wave spell in Delhi can be attributed to a large gap between two western disturbances which allowed the chilly northwesterly winds from the mountains to affect the plains for a longer-than-usual period,” Mahesh Palawat, vice president (meteorology and climate change), Skymet Weather, was quoted as saying by PTI.
Palawat further explained that mostly there is a gap of three to four days between two western disturbances but this time the period expanded to seven days.
A western disturbance left the region by 30 December, while the next one came on 7 January, reported PTI.
Western disturbance is a weather system characterised by warm moist winds from the Middle East, says the news agency.
According to Skymet Weather report, before western disturbance approaches, it is preceded by a “warm front wherein the air is warmer”, thus leading to an uptick in mercury over the hills during winter.
Cloud cover and light winds caused due to greenhouse effect also raise the minimum temperatures.
While clear sky conditions and northerly cold winds plunge the temperature in Delhi in winter, the report added.
Meanwhile, the cold wave conditions are expected to abate in the coming days in northern India.
The IMD predicted “dense to very dense fog conditions” over many parts of Delhi and other states such as Punjab, Haryana, Uttar Pradesh and Bihar, till Tuesday.
After 10 January, there will be no dense fog or cold wave but isolated fog may prevail, IMD senior scientist RK Jenamani told ANI.
With inputs from agencies
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