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The minimum temperatures in northwest and central India are likely to drop by three to five degrees Celsius over the next five days, leading to cold day conditions in Delhi and a cold wave in parts of Punjab, Haryana, Uttar Pradesh, Rajasthan, Gujarat and Maharashtra, the IMD had forecast on Monday.Dense to very dense fog is predicted in parts of Punjab, Uttar Pradesh, Rajasthan, Haryana, Delhi, Bihar, West Bengal, Odisha, Assam, Sikkim, Meghalaya and Tripura over the next two to three days, it said.According to the IMD, a “cold day” is when the minimum temperature is less than 10 degrees Celsius and the maximum is at least 4.5 degrees Celsius below normal.A “severe” cold day is when the maximum temperature is at least 6.5 notches below normal.The air quality index in Delhi on Tuesday morning stood in the poor category (249).An AQI between zero and 50 is considered good, 51 and 100 satisfactory, 101 and 200 moderate, 201 and 300 poor, 301 and 400 very poor, and 401 and 500 severe.
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Minimum temperature drops in Delhi to 6.2 deg C, shallow fog in city
