Answer:
The
Western disturbances are weather phenomena of the winter months. These are the
temperate cyclones which originate over Mediterranean Sea and Western Asia and
move into India, along with the Westerly flow of jet streams.
They disturb the calm and quiet weather of the North and North-Western
India by causing
cyclonic rains over the plains and snowfall in the mountains.
Winter rainfall caused by them locally known as 'Mahawat'
is of immense importance for the cultivation of rahi crops.
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