Mariel Knot has forwarded us these truly spectacular photos she and her sister Anneke and brother David took of a waterspout off South Haven, Michigan early Thursday afternoon. Mariel tells us that her family is from Flossmoor and that they have been vacationing in South Haven. I'm sure any kind of encounter with a waterspout was the last thing on Mariel and her family's mind as the looked out over the lake and were greeted by this sight! These photos were taken at 1:15 pm Chicago time. The waterspout picture here was spawned by a cluster of showers and thunderstorms which traveled south over the east end of Lake Michigan during the night and during morning hours. The destabilizing effect of cool air aloft led to the thunderstorm development. The Grand Rapids National Weather Service Office issued a special marine warning advising mariners of the danger posed by the waterspout and warning of the potential of others. Many thanks Mariel, her brother David and sister Anneke for sharing these photos with us! They are terrific! Tom Skilling Photos courtesy of Mariel, Anneke and David Knot ...