Explain western cyclonic disturbances.
The western cyclonic disturbances are experienced in north and north western parts of India during winter season. They are caused due to the westerly winds which flow from west to east between 300-600 latitude.
They originate mostly in the Mediterranean sea as extra tropical cyclones. These disturbances travel through Iran, Afghanistan and Pakistan to enter the Indian subcontinent. They bring winter rainfall to north and north western parts of India including Punjab, Haryana, Uttar Pradesh and Delhi. This winter shower is considered extremely important for the rabi crops as it is the staple diet of people in that region.