Warming waters: Lake Superior nearly breaks water temperature record
September 9, 2016 - MPR’s Dan Kraker investigates the warming waters of Lake Superior. In late August 2016, the average surface water temperature for the entire lake hit 68 and a half degrees (the second highest ever recorded). In Lake Superior, researchers at the University of Minnesota Duluth have found that summer surface water temperatures have increased by 5 degrees over the past 30 years.