Analyze the climatic characteristics of the Northeast Indian monsoon regime: Assertion (A): Assam and neighboring northeastern states experience heavy pre-monsoon showers locally known as Bardoli Chheerha or Nor'westers during March and April. Reason (R): These convective thunderstorms are triggered by intense surface heating during the afternoon, combining with moisture advection from the Bay of Bengal to produce violent squalls and rainfall beneficial for tea cultivation. Which of the following is correct?

💡 Solution & Explanation

Bardoli Chheerha, popularly known as Boroxun in Assamese or Nor'westers elsewhere in eastern India, are pre-monsoon convective thunderstorms occurring in late spring. Intense surface warming combined with moisture-laden southerly winds from the Bay of Bengal generates towering cumulonimbus clouds, leading to heavy squalls and rainfall that provide vital soil moisture for the early flush of tea leaves in Assam. Both statements correctly describe the meteorological mechanism and agricultural significance of these storms.