The north-west part of India receives rainfall in winter due to __________.
- A.the south-west monsoon
- B.the north-east monsoon
- C.western disturbance
- D.the retreating of the monsoon
Show answer
Correct answer: C. western disturbance
Explanation
The correct answer is C, western disturbance. Western disturbances are low-pressure systems that start over the Mediterranean Sea and are carried east towards India by the westerly jet stream in winter. They bring light rain to Punjab, Haryana, Delhi and western Uttar Pradesh, and snowfall to Jammu and Kashmir, Himachal Pradesh and Uttarakhand. This small winter rain, locally called 'mahawat', is very useful for rabi crops, especially wheat. A is wrong because the south-west monsoon brings rain from June to September, not in winter. B is wrong because the north-east monsoon gives winter rain mainly to the Tamil Nadu coast, not to the north-west. D is wrong because the retreating monsoon of October and November mostly affects the east coast and the south, and brings cyclones in the Bay of Bengal. Exam tip: winter rain in the north-west comes from western disturbances from the Mediterranean; winter rain in Tamil Nadu comes from the north-east monsoon.