Traffic jam on #DND (Delhi Noida Direct) flyway following low visibility in Delhi-NCR due to fog. (Photos: ANI)… https://t.co/FQXApTnsAN — TOI Noida (@TOINoida) 1577682963000

Update issued at 0830 hours. For live weather updates on the fog situation, visit https://t.co/Y9uMZDIrYM #FogAlert… https://t.co/3Th8FasBA9 — Delhi Airport (@DelhiAirport) 1577676156000

India Meteorological Department: Temperatures at 5.30am on December 30 and change in temperature in the last 24 hou… https://t.co/nKx2Wm2E0v — TOI Delhi (@TOIDelhi) 1577676242000

Visual from Noida-Greater Noida Expressway

Low visibility in Ghaziabad due to dense fog. (Photos: ANI) #DelhiNCRFog #DelhiNCRWeather https://t.co/rBuQIEFuUH — TOI Noida (@TOINoida) 1577674829000

Update issued at 0600 hours : #Fog #FogAlert #DelhiAirport https://t.co/MA0QdqDDVo — Delhi Airport (@DelhiAirport) 1577667590000

#TravelUpdate https://t.co/URYQf7nXyf — Vistara (@airvistara) 1577676697000

#TravelUpdate : Due to bad weather (poor visibility) in Delhi, flights to/ from Delhi are impacted. Thank you. https://t.co/4q7kpuPl6B — Vistara (@airvistara) 1577670893000

NEW DELHI: Dense fog engulfed Delhi and the national capital region (NCR) on Monday, leading to disruption in flight operations at the Indira Gandhi International Airport (IGIA).Delhi airport update: 21 flights diverted and around 40 have been cancelled till now due to the fog.Delhi is likely to experience its coldest day in December in 119 years on Monday with the day temperature recording 9.4 degrees Celsius, the India Meteorological Department said. The temperature recorded by the Safdurjung laboratory at 2:30 pm was 9.4 degrees Celsius.Heavy fog disrupted flight operations at the Delhi airport with 21 flights diverted, six cancelled, and around 530 delayed, an official said.Thick fog has also been witnessed near Kalindi Kunj, Mayur Vihar Phase-1, RK Puram, Delhi cantonment area and other places of the national capital.Due to ongoing dense fog situation, flight operations are impacted at Delhi airport. CAT II and CAT IIIA compliant aircraft and pilots are cable to operate, tweeted Delhi airport.The minimum temperature recorded at the Safdarjung observatory (2.6°C) and Palam (2.9°C).Low visibility procedures are still in progress, tweeted Delhi airport."Visibility recorded at 5.30am: Jammu, Ambala, Churu, Agra, Gwalior, Delhi (Palam),Varanasi-0-25 each; Amritsar, Ganganagar, Patiala, Chandigarh, Bareilly, Jhansi, Purnea, Gaya, Bhagalpur, Satna-50 each; Bikaner, Delhi (Safdarjung), Sultanpur, Malda, Kailashahar-200 each," said IMD in a tweet.Normal operations have been suspended at the Delhi airport due to poor visibility, only CAT III B (instrument landing system) compliant pilots can land.Near zero visibility at C-Lal chowk in southeast Delhi. (Photo credit: Kanishk Sharma)Due to bad weather, flight operations are affected. CAT III B compliant aircraft and pilots are currently able to land. Passengers are requested to stay in touch with the airline concerned for updated flight information, tweeted Delhi airport.Due to dense fog and poor visibility in Delhi, arrivals/departures from Delhi are delayed with consequential impact across the network, tweeted Vistara."Due to bad weather (poor visibility) in Delhi, flights to/ from Delhi are impacted," the airline announced.Meanwhile, railway operations severely affected as 30 trains were delayed due to low visibility.From December 31 onwards, rain is likely in the capital city and its adjoining areas such as Noida, Gurugram, Ghaziabad and Faridabad.This weather phenomenon is likely to continue till January 3, predicted the weather forecast agency.(With inputs from ANI and PTI)