According to the National Weather Forecasting Centre of the India Meteorological Department (IMD):
Air mass inflow forecast in Delhi along with predicted ventilation coefficient and weather forecast is as follows:
The air quality over Delhi-NCR is likely to remain in Moderate to Poor category on 06.04.2021. The air quality is likely to improve to Moderate category on 07.04.2021 and 08.04.2021. The Outlook for subsequent 5 Days: The air quality is likely to remain largely in Moderate category.
The predominant surface wind is likely to be coming from East directions of Delhi with wind speed 10-12 kmph, partly cloudy sky with possibility of very light rain/drizzle towards night on 06.04.2021. The predominant surface wind is likely to be coming from Northeast/Northwest directions of Delhi with wind speed 14-20 kmph, partly cloudy sky and strong surface winds (speed 20-30 kmph) during the day on 07.04.2021. The predominant surface wind is likely to be coming from North/Northwest directions of Delhi with wind speed 16-20 kmph and mainly clear sky and strong surface winds (speed 20-30 kmph) during the day on 08.04.2021.
Predicted maximum mixing depth is likely to be approx 4500 m on 06.04.2021, 4000 m on 07.04.2021 and 3800 m on 08.04.2021 over Delhi. Maximum Ventilation index is likely to be approx 28000 m2/s on 06.04.2021 and 20000 m2/s on 07.04.2021 and 17000 m2/s on 08.04.2021. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.
No significant dust transport from neighboring region to Delhi/NCR is likely.
Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.
