Name:   MartiniMan - Subject:   Weird stuff going on Date:   9/12/2017 8:54:20 AM

This is pretty typical when you have an extremly low pressure system like a hurricane.  It will pull the water toward it.  Every hurricane has a storm surge and that water has to come from somewhere.  I don't think it would be noticeable with a smaller water body like Lake Martin but it might be noticable in the Great Lakes but it would be uncommon to have that much of a pressure gradient in the midwest.