Lake Superior has frozen over once since 1973, according to NOAA. The lake had 100% ice cover in 1996. Lake Michigan's ice cover high was 93.2% in 2014. Lake Huron had 98.2% ice cover in 1996.

But with overall warming due to climate change, the study found that Lakes Michigan and Huron don't consistently separate ...

Lake Erie continues to have the most ice, at 14.98% coverage, while Lake Huron is at 14.60%. The last time officials recorded 9% total ice coverage was on Jan. 17. Overall, the Great Lakes saw ...