This was taken Wednesday evening when - I think - the Wrigley Building was in the process of converting its tower lighting from September's Blue (for Prostate Cancer Awareness) to October's Pink (for Breast Cancer Awareness)
There's an odd weather pattern (see the article here) involving the warm temperature of Lake Michigan and a slow moving low pressure weather system that caused a large number of waterspouts to form on Lake Michigan this past weekend. Here's the one I saw near South Haven. Michigan.