Answer:
Jet
streams are a narrow belt of high-altitude winds in the troposphere. The
sub-tropical Westerly jet stream blowing South of the Himalayas are responsible
for the Western cyclonic disturbances experienced in the North and
North-Western parts of the country during the winter months. The sub-tropical
Easterly jet stream blowing over peninsular India is responsible for the
tropical cyclones that affect the Eastern coastal regions of India during the
monsoon as well as during the October to November period.
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