Not even remotely close to it in southern areas. Close, but not quite there in northern areas, except for coastal stations. I think BLI got down to 0 or +1˚F last January, but YXX did not get subzero like that map showed. YVR was more like 10˚F instead of 8, but MBY (further inland) did drop to 7.
That airmass was a beast at the lower levels. I remember it actually came off of Greenland which is highly unusual for us. Up here the cold air was much thinker, but 850s still weren't THAT crazy.