We are under a big dome of dense and very cold air.

Which means little wind, and deep chill. Perfect for ice formation. (Ice formation is as much a function of wind as cold.) Unfortunately, all the lakes around here froze before the big snows. The Great Lakes, however, are now rapidly catching up with their normal ice averages.

I have to apologize for doing close to nothing today besides watching the impeachment trial.
Powerful and irrefutable prosecution.