Rain in Delhi-NCR due to ‘influence of low-pressure area, monsoon trough’: What does that mean?

Recent rains in Delhi-NCR have been attributed to a low-pressure area over Madhya Pradesh and a shifting monsoon trough. This meteorological phenomenon brings together converging air masses that cool and condense, leading to precipitation. The monsoon trough's movement influences weather patterns across northern India, and its interaction with local low-pressure systems is crucial for timely and effective rainfall. This rain is significant as it alleviates water shortages and supports local agriculture, though it also poses challenges like urban flooding.