The Great Lakes' ice coverage was lagging behind average for much of the winter. Now, coverage is above average for some ...

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

Parts of the Great Lakes that were already inundated with snow over the holiday weekend can expect another round of heavy snow as an "Alberta Clipper" impacts the area. A powerful cold front will ...

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

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 clicking on the links below: Brief reports that summarize, analyze, ...