Data, maps, and reports are available at the lake-level (Great Lakes), for each state, and for the five-state region as a whole by ... and Wisconsin Departments of Natural Resources (DNR) who helped ...

The dip of Arctic air into the Midwest expanded ice coverage across all 5 Great Lakes, some seeing greater increases than ...

As executive director of the Great Lakes Observing System, she’s leading a campaign to map every meter of the lakes’ bottom.