I have not seen anything like this or even heard about it but it appears that weather conditions can be such that a thick carpet of ice can inexorably march from lakes onto land. It looks like a creeping monster, pushing aside even buildings in its path. It is called an ‘ice shove’ and scientists are familiar with the phenomenon and say it happens on occasion in places like Alaska.
It looks very much ike a mudslide except that it is moving horizontally and is more solid. There is something weirdly compelling about watching it, like watching a slow motion car crash. It gives one a sense of the unstoppable power of natural forces and what glacier motion speeded up might look like.
Below is one ice shove that was captured receently in Mille Lacs Lake, Minnesota.