The rain gauges in Delhi have shown almost nothing. Yet, Delhi-NCR has been on the edge of a violent stormy corridor through Thursday night. The impact has been far more severe in Uttar Pradesh, where around 111 deaths have been reported due to violent weather since Thursday. While dust storms and thunderstorms are not unusual in May, the intensity and frequency of the recent spells have raised questions over what is driving the weather. Senior India Meteorological Department (IMD) officials told The Indian Express that the early Friday activity over Delhi was caused by the interaction of lower-level moisture-laden easterly winds with dry westerly winds in the middle levels of the atmosphere. Simply put, warm and moist air closer to the ground interacted with the drier air higher up. This kind of atmospheric setup can make the air unstable and trigger sudden thunderstorm activity, strong gusty winds, lightning and dust storms. What happened in Delhi-NCR early Friday?…