This is why Koppen climate classification always seemed lacking to me. It classifies basically the whole eastern 2/3s of the continent between 40 and 50N as humid continental. But areas between the Rockies and Mississippi River are true continental climates with huge temperature ranges, colder average temps, less precipitation, and a pronounced summer-time max. in precipitation. Here in the Great Lakes it's more a semi/modified-continental climate, with less temperature range, warmer average temps, more even distribution in precipitation between the seasons, and more precipitation overall than areas further west.
I don't think I ever went on a Koppen rant on this board, so, there it was.