Westerlies flow between latitudes 30-60 degrees North and 30-60 degrees South. The statement mentions 30N-60S. So it is wrong.
The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India. They are a non- monsoonal precipitation pattern driven by the Westerlies . (http:///rbis/india_information/)
Source: NCERT -9th Standard – Contemporary India-I – Chapter 4 (Climate)