Wanna provide some sauce for that assertion?

I live right in the center of the area you mention, mid Michigan. It has actually been a pretty mild winter until the last week or so. The Great Lakes have less than 10% ice coverage which is way below historical averages. The snowbelt regions of Michigan, areas that measure annual snowfall in the 10s of feet, have 18 inches on the ground even with warmer than normal lakes. (May be more now. I havent been up north to the cabin in 3 weeks and this cold wave undoubtedly has turned on the snow machine due to warm water and no ice.)

Four or five winters ago we had at least 10 nights below -30. The only time in my 55 years living here I have seen it dip below -15. On perfectly cloudless days I saw diamond dust. Diamond dust is where any residual moisture in the air freezes spontaneously and falls as a light super tiny crystalline snow that reflects the sun like diamonds. Only time in my life I saw this phenomena here. It has to be really, really cold to do this. Like Arctic cold. That year the Great Lakes achieved 100% ice coverage.

This year not so much. I am a concrete contractor. When the ground freezes we can not pour concrete outside. This season we poured driveways the first week of January. Way outside the norms.

So please show me where this is "the coldest winter...in over 30 years" because someone who has lived here for 55 years just isnt seeing it.