At least in terms of barometric pressure [[955mb or 954mb thus far, may even still be strengthening) just a few miles south of the Canadian border in Minnesota. Basically it's the equivalent of a category 2 or 3 hurricane. It's also the strongest storm on record to impact the states of Wisconsin & Minnesota.

It's predecessor was the Great Blizzard of 1978 which bombed out to 958mb over Cleveland.

However, it's only the 2nd strongest in terms of severity [[behind the Fitzgerald Storm).

Of course this is all non-tropical.

This was in fact the same system that sparked the strong wind & severe weather headlines in Detroit [[and much of the Ohio/Tenessee Valley) today.

Much of the Northern Plains is under Blizzard Warnings & Winter Storm Warnings with many areas expecting 6 inches or more of snow.