how do winds causessnow and rainfall in the northen plain of India during winter season?
Western cyclonic disturbances are extra-tropical storms that bring rainfall during winter months to the northwestern parts of the Indian subcontinent. These storms originate over the Mediterranean Sea. The moisture is carried in the upper atmosphere in stead of lower atmosphere driven by the westerlies. The Western disturbances are important for the Rabi crop in the Indian subcontinent, including the staple crop of wheat.