North India woke up in a thick blanket of dense fog that covered most parts of the Delhi- NCR region on Sunday morning, with visibility on roads reduced to zero. Amid the low visibility in the area, at least 22 trains to the national capital from various parts of the country are running late and several flights were also affected at Delhi airport.Delhi-NCR covered in dense fog, trains & flights affectedOn Sunday, as many as 22 trains to Delhi are running late due to heavy fog, said the railways.22 trains to Delhi from various parts of the country are running late due to dense fog conditions as on 14th January. pic.twitter.com/vmY6LBOSvr— ANI (@ANI) January 14, 2024According to the India Meteorological Department (IMD), visibility is currently poor, and it is likely to deteriorate during the night and morning. At present, the visibility at the IGI airport has been recorded at 350 metres, and it is likely to be reduced by up to 200 meters in a few hours from now.#WATCH | Visibility affected in parts of the national capital as a blanket of dense fog covers Delhi.(Visuals from 10 Janpath shot at 7.50 am) pic.twitter.com/y5AQAgbLsl— ANI (@ANI) January 14, 2024The minimum temperature in the RK Puram Area was recorded at 7 degrees Celsius in the early hours of the day.The development comes as Delhi on Saturday recorded its lowest temperature of the season with the mercury falling to 3.6 degrees Celsius. The IMD predicted that dense fog and prevailing cold wave conditions are unlikely to abate in parts of northwest India during the next 3 to 4 days, till January 16.Taking notes from the prevailing conditions, Delhis IGI airport said, “While landing and takeoffs continue at Delhi Airport, flights that are not CAT III compliant may get affected. Passengers are requested to contact the airline concerned for updated flight information.What is CAT IIINotably, CAT III is a navigation system that helps aircraft land during dense fog and inclement weather conditions when visibility is low. Delhis IGI airport is equipped with a state-of-the-art anti-fog landing system called the CAT III Instrument Landing System (ILS). The guidance system aids planes in landing in low visibility with the help of radio signals, etc.Persisting cold day conditions and thick fog continue to affect the NCR too, with poor visibility prevailing in areas across the Yamuna.IMD reportMeanwhile, for the first time this winter season, zero meter visibility has been recorded in Ganganagar, Patiala, Ambala, Chandigarh, Palam, Safdarjung, Bareilly, Lucknow, Bahraich, Varanasi, Prayagraj and Tezpur (Assam), said the weather agency.For the first time this winter season, zero meter visibility has been recorded in Ganganagar, Patiala, Ambala, Chandigarh, Palam, Safdarjung, Bareilly, Lucknow, Bahraich, Varanasi, Prayagraj and Tezpur (Assam): IMD.— ANI (@ANI) January 14, 2024Late on Saturday, the IMD issued a forecast, saying, Fog conditions observed at 23:30 hours of January 13: Moderate fog in isolated pockets of Punjab, Haryana, Uttar Pradesh and northwest Madhya Pradesh and shallow fog in isolated pockets of Chandigarh, Delhi and Assam.According to the IMD, very dense fog is when visibility is between 0 and 50 metres, between 51 and 200 metres dense, between 201 and 500 metres moderate, and between 501 and 1,000 metres shallow.
