A rare waterspout hit the westside of Lake Michigan Saturday. Residents of Chicago and Milwaukee metro areas could see the funnels 2 to 5 miles away from the shore according to the Grand Rapids Press:
"Cold unstable air and warm water, creating a 25 degree temperature difference, were the two important ingredients that came together Saturday, the National Weather Service said.
The conditions produced 'a rare outbreak of waterspouts stretching from off shore of Milwaukee, south to the Chicagoland area,' the NWS Milwaukee office said."
ITN News footage of the rare form of tornado looming over Lake Michigan: