Ice extent jumped to 21 percent in early February in response to a cold snap. But since then, it has declined. Maximum ice cover is usually between mid-February and early March.
https://go.nasa.gov/3k7B2C0
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https://go.nasa.gov/3k7B2C0
#NASAEarth
Great Lakes Low on Ice
This winter, ice cover in the basin has hovered at unusually low levels.go.nasa.gov