New Delhi: The India Meteorological Department (IMD) said that there is a forecast of a cold wave with moderate to dense fog in the next four days in the national capital.
On Tuesday, the Safdarjung Observatory recorded minimum temperature at 3.6 degrees Celsius.
A cold wave is declared when the minimum temperature is recorded at 10 degrees Celsius or below or it is four notches below the season’s normal temperature for two straight days. A cold wave also happens when the minimum temperature is less than 4 degrees Celsius in the plains.
As per the IMD, the western disturbance has just passed. “It was affecting western Himalayas. There is moisture in the air and wind speed is also likely to reduce,” said an official.
On the other hand, there was an improvement in air quality. Hourly average air quality index (AQI) was recorded at 233 at 7 am. As per the data of Central Pollution Control Board (CPCB), the overall AQI was 253 in Delhi on Monday.