Nor'westers

They are also known as kalboisakhi or kalbaisakhi (, ; , ), and as bordoisila (, ). In Bengali, the term kālbôiśākhī refers to a "fateful thing" which occurs in the Bengali month of Bôiśākh. In Assamese, the event is known as a bôrdôisilā, which is derived from the Bodo word bôrdôisikhlā, in which bôr means wind, dôi means water and sikhlā means girl, represents the goddess of nature, wind and rain and also marks the beginning of the Assamese month Bôhāg or Baishagu. == Genesis ==

during a nor'wester in Thakurgaon, Northern Bangladesh (April 2022) The period of kalboisakhi formation generally begins in April and lasts until the monsoon establishes itself over Northeast India, although March kalboisakhi are not unknown. kalboisakhi originate over the Chhotanagpur Plateau between the states of Bihar and Jharkhand. They gradually gain strength as they move southeastwards and impact the states of Odisha, West Bengal, and Assam with gale-speed winds (often exceeding ), torrential rains, and hailstorms. On some occasions, incursion of moist air in these elevated places, when combined with high surface temperatures, causes violent thunderstorms. == Effects ==

Kalboisakhi brings destruction by uprooting trees due to gale winds and waterlogging roads due to heavy rainfall. However it is extremely helpful for kharif crops like jute, paddy, etc. and give relief after the mid-day heat and give rainfall to the dry soils for the development of the crops. == In Bengali literature ==

Many Bengali poets and artists have regarded "kalboisakhi" as events of astounding beauty. Bengali poet Mohit Lal Majumder described the storm in his poem Kalboisakhi, and the storms also inspired Rabindranath Tagore's poem Esho Hey Boisakh (). == Photography ==

File:বৈশাখ মাসে বৃষ্টি আসার আগ মূহুর্ত.jpg|At 8:28 am on the 8th of Baishakh, 1432 (21 April 2025 CE), the moment before the month's rainfall in Bangladesh. File:Before the rains arrive in the month of Baishakh in Bangladesh.jpg|Before the rains come in the month of Baishakh in Bangladesh ==See also==