Explanation: Nor Westers are dreaded evening thunderstorms in Bengal and Assam.

• Their notorious nature can be understood from the local nomenclature of ‘Kalbaisakhi’, a calamity of the month of Baisakh.
• These showers are useful for tea, jute and rice cultivation.
• In Assam, these storms are known as “Bardoisila”.

Source: NCERT – Fundamental of Physical Geography