As executive director of the Great Lakes Observing System, she's leading a campaign to map every meter of the lakes ... manages data from a network of lake observers and makes it easily accessible.

April marked the start of the Great Lakes' seasonal rise as ice melted. "In the spring, the ice and snow melts and rainfall become abundant. Water levels will rise through the summer. Lake levels ...

Here’s an overall look at the current surface water temperatures on the Great Lakes ... time of year. Lake Superior is quite warm for this time of year. If you look at the map above, Lake ...