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2h ago

Delhi’s Air Quality Hits 15-Week High Before Easing as Post-Monsoon Winds Shift

Meteorologists tied the brief surge to a post-monsoon wind shift, with a cyclonic circulation funneling dust into the city.

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Delhi's pollution on Saturday was largely due to the formation of a cyclonic circulation that pulled dust into the city.
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Overview

  • The 24-hour average AQI reached 169 at 4 pm on Saturday, the highest since mid-June, before improving to 155 by 11 pm, CPCB data showed.
  • By 4 pm Sunday, the AQI stood at 131 in the moderate band, and AQEWS forecasts point to generally moderate conditions over the next few days.
  • Analysts cited a change from dry westerlies to more humid easterlies and a cyclonic circulation that pulled in dust and smoke, producing the spike.
  • The IMD confirmed early monsoon withdrawal from Delhi and expects partly cloudy, rain-free days, with recent highs of 37.2°C on Saturday and 38.1°C on Sunday.
  • Experts warn of rising risk in coming weeks as northwest transport winds carry stubble-burning emissions from Punjab, and the Supreme Court has barred cracker sales in Delhi-NCR ahead of Diwali.