https://montrealgazette.com/news/local-news/the-humidex-canadians-didnt-invent-humidity-but-we-labeled-it 

“Although Canadians had coined the term “humidex” in 1965, Masterton and Richardson were the Atmospheric Environment Service scientists who created the formula for it in 1979. 

The service has since morphed into Environment #canada but the formulation remains essentially the same, producing a “scale of discomfort” that Canadians cling to with frustration and pride” #humidex #montreal