Why does Punjab get rain in winter?

Punjab receives rainfall from three different sources- southwest monsoon, southeast monsoon, western disturbances. In winter, the reason for rain is western disturbances. A Western Disturbance is an extratropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent. Punjab lies in the north-west of India. It brings moderate to heavy rain in low-lying areas and heavy snow to mountainous areas of India. It is also known as pre-monsoon seasonal rainfall.