Lake Superior is almost completely ice covered, about a month ahead of the time it usually reaches this state in years when it has nearly complete ice cover. As of 5 February 2014, the lake is approximately 92% frozen. The 20-year-old record is 91% (5 February 1994). According to the Great Lakes Environmental Research Laboratory, the entire Great Lakes system is now reportedly 77% covered with ice.

MODIS satellite image of the Great Lakes on 4 February 2014.
Great Lakes ice chart for 4 February 2014 from the U.S. National Ice Center.
Percent ice coverage for the Great Lakes from winters of 1980/81 through 2013/14. From Environment Canada with annotations from Minnesota Public Radio.