On April 16, many parts of Delhi NCR, Punjab, Haryana, Rajasthan and western parts of Uttar Pradesh witnessed intense thunderstorm and dust storm activities. This was the first widespread and intense pre-monsoon episode for the north-west plains. Delhi recorded strong winds around 75 to 80 kmph during the dust storm.
Another active Western disturbance will start effect in the western Himalayas by the afternoon/evening of April 20. The induced cyclonic circulation over Central Pakistan and adjoining parts of West Punjab and Haryana will be responsible for another intense thunderstorm and dust storm across North-West India. Parts of Rajasthan such as Jaisalmer, Bikaner, Sri Ganganagar, Hanumangarh, Churu, Sikar and Alwar may receive dust storm. Delhi NCR may also witness a dust storm along with light rain by evening of April 20. Parts of Haryana, Punjab and West Uttar Pradesh will also witness dust storm and thunderstorm.
These on and off monsoon activities do not allow the steep rise in temperatures. The absence of pre-monsoon activities would have increased the temperature leading to the heatwave conditions. But, we do not expect heatwave conditions to make a comeback until the end of next week.