SHORT RANGE FORECAST:     (1) Delhi: AQI today indicates ‘moderate’ air quality with PM10 as the primary pollutant. Dust (size > 2.5 micrometer) contributes ~ 56% to PM10. For the next 3 days (28th, 29th, 30th) peak wind speed is likely to be ~ 18 km/h causing moderate dispersion and AQI is likely to be within ‘moderate’ or ‘lower end of poor’. Moderate temperature (< 40C) and mixing layer height (~ 3 km) maintains moderate ventilation by convection improving air quality.         (2) Mumbai, Pune and Ahmedabad: AQI of Pune indicates ‘upper end of satisfactory’ air quality today and likely to be within ‘satisfactory’ or ‘lower end of moderate’ for the next 2 days. AQI of Mumbai indicates ‘satisfactory’ and likely to be within ‘satisfactory’ for the next 2 days. AQI of Ahmedabad today indicates ‘lower end of moderate’ and for the next 2 days likely to be within ‘moderate’.