Question

What are the Causes of western disturbence

Answer 1

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. ... The moisture in these storms usually originates over the Mediterranean Sea and the Atlantic Ocean.

Answer 2

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cyclone depressions coming from Mediterranean sea called "western disturbances" and cause low to moderate rainfall over northern India. This rainfall is boon to wheat crop which is generally cultivated in "Rabi season".