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AIR QUALITY EARLY WARNING SYSTEM FOR DELHI
MINISTRY OF EARTH SCIENCES, GOVT. OF INDIA
पृथ्वी विज्ञान मंत्रालय, भारत सरकार
(Project By : Indian Institute of Tropical Meteorology, Pune)

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Near Realtime Observation At Delhi
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Air Quality Forecast
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 Air Quality and Weather Bulletin for Delhi NCR (03.12.2020)

 1.  As per AQ-EWS models the air quality over Delhi NCR is likely to improve marginally and reach in lower end of Very poor category on 03.12.2020. The air quality is likely to deteriorate on 04.12.2020 but remain in Very poor category. The air quality is likely to improve on 05.12.2020 and remain in Very poor category. Outlook for subsequent 5 Days: The air quality is likely to deteriorate on 6th December reaching in upper end of very poor category and start improving from 7th December.  

 2.   The predominant surface wind is likely to be coming from Northwest/North direction of Delhi with wind speed upto 06 kmph during daytime and from East direction during night, mainly clear sky, smoke on 03.12.2020. The predominant surface wind is likely to be coming from East direction of Delhi with wind speed upto 04 kmph, mainly clear sky and mist/shallow fog in the morning on 04.12.2020. The predominant surface wind is likely to be coming from East direction of Delhi with wind speed 06-08 kmph, mainly clear sky and mist/shallow fog in the morning on 05.12.2020. A Western Disturbance is likely to affect north western Himalayan region from 4th December 2020.   

 3.  Predicted maximum mixing depth is likely to be approx. 1000 m from 03.12.2020 to 05.12.2020 over Delhi. Ventilation index is likely to be approx. 2500 m2/s on 03.12.2020, 1000 m2/s on 04.12.2020 and 2000 m2/s on 05.12.2020. The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavourable for dispersion of pollutants.     

 4.   Farm fire counts were negligible over Punjab, adjoining Pakistan and Haryana on 02.12.2020 the impact of which is likely to be negligible on air quality of Delhi. 

 5.    Detailed forecast analysis and verification can be seen at https://ews.tropmet.res.in.

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Current AQI
Forecast
Mid Visibility IGIA
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Air Quality Index Range

Good

AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.

Satisfactory

AQI: Satisfactory (51 - 100)
Air quality is considered satisfactory, and air pollution poses little or no risk.

Moderate

AQI: Moderate (101 - 200)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Poor

AQI: Poor for Sensitive Groups (201 - 300)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.

Very Poor

AQI: Very Poor (301 - 400)
Health alert: everyone may experience more serious health effects.

Severe

AQI: Severe (401 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.

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Visibility Range

CAT - IIIC

VISIBILITY: Below 50 M

CAT - IIIB

VISIBILITY: FROM 50M TO 174M

CAT - IIIA

VISIBILITY: FROM 175M TO 299M

CAT - II

VISIBILITY: FROM 300M TO 549M

CAT -I

VISIBILITY: 500M AND ABOVE

Air Quality Forecast Over India

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