A kalbaisakhi (Bengali: কাল বৈশাখী /kaːl boiʃakʰi/, Odia: କାଳ ବୈଶାଖୀ /kaɭɔ̟ bɔ̟isakʰi/,), also known in Assam as a bordoisila (বৰদৈচিলা) and in some English publications as a nor'wester, is a localised rainfall and thunderstorm event which occurs in Bangladesh as well as the Indian states of Bihar, Jharkhand, Odisha, Tripura, Assam, and West Bengal during summer. These storms generally occur in the afternoon or just before sunset, when thick dark black clouds start appearing over the sky and then bring gale-speed wind with torrential rain, often with hail, but spanning only a short period of time.[1][2]
- ^ "Are you petrified by the term Kal Baisakhi?". www.skymetweather.com. 2015-03-21. Retrieved 2021-05-12.
- ^ Roy, S. C.; Chatterji, G. (September 1929). "Origin of Nor'westers". Nature. 124 (3126): 481. Bibcode:1929Natur.124..481R. doi:10.1038/124481a0. ISSN 1476-4687.