WC temps are made up BS and don't really mean anything. It's only touched overnight lows of -30F a handful of times over many seasons in the metro and only for a couple days max. I only remember two days where the daytime temp was below -20F and that was during a polar vortex.

Do you live in international falls or something? -30F is extremely rare for the metro area, and -40 to -50 is basically unheard of.

I've lived in MN my whole life and the coldest I remember was a few overnight lows of -30F during a polar vortex. I think some areas in greater MN might have hit -40F here and there but it's certainly not routine and doesn't stay that cold very long. Anything lower than say -10F is not common and usually only for a few days to a week or so.