The record high temperatures this summer combined with cloudless skies and cooler air finally moving in to create some spectacular but dangerous weather on Lake Michigan earlier this summer. 
“Because of the heat wave that hammered the nation this spring and summer, the Great Lakes are approaching the warmest they’ve been in a century, reports Climate Central. Monitoring stations in Lake Michigan that normally see average water temps in early July at just over 60 degrees Fahrenheit clocked 80 degrees on July 6, 2012.”
Visit the link above to learn more about these phenomena, and visit this link to see video footage of waterspouts above Lake Michigan.