About halfway between Racine, Wisconsin, and Holland, Michigan, sensors keep close tabs on the temperature of Lake Michigan at a depth of 492 feet and have reported this data almost hourly for 30 years. This 30 year dataset indicates that the depths of Lake Michigan are warming and the annual “turnover” of the lake from warm to cold is changing. Read the full story by WTMJ-TV – Milwaukee, WI.
Great Lakes Commission
https://www.glc.org/dailynews/20210517-wisconsin-climate