Question

what are western disturbance called​

Answer 1

it is an extratropical storm originating in the Mediterranean region that bring sudden winter rain to the northwest parts of indian sub continent .....

Answer 2

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cyclone depressions coming from Mediterranean sea called "western disturbances"

EXTRA INFORMATION :-

They cause low to moderate rainfall over northern India. This rainfall is boon to wheat crop which is generally cultivated in "Rabi season".