I'm not sure what method Environment Canada uses for measurement, but my scientific methods have come up with a much different set of numbers.
It is well known that skyscrapers create their own weather patterns. That was clearly evident today. The vicious wind took the hat off my head and blew it out of sight in 1.4seconds. Given that the visibility was around 26meters in the blowing snow, the wind speed must have been at least 67km/h. Fighting that wind on the glare ice was quite a chore. Upon finally reaching the cache and prying it open, my space pen would not write in the log. Seeing as its rated for -50F operation, the temperature must have exceeded that.
P.S. you might want to bring a shotgun as there was a 20m polar bear lurking around the corner, that or at least stay down wind