I’ve touched on lake-effect snows, the classic pattern in the Upper Midwest and western New York State in which frigid winds blowing over relatively warm Great Lakes waters generate persistent cloud bands and lots of snow.
![doteffects-blog](http://www.cawater-info.net/all_about_water/en/wp-content/uploads/2016/06/doteffects-blog.jpg)
Cold air streaming over relatively warm Great Lakes waters produced streaming bands of clouds and so-called “lake effect” snow this week. Credit NASA / University of Wisconsin
The image above, to which I was directed by a Dot Earth reader, Mike Mangan, was posted earlier today by the Michigan television meteorologist Bill Steffen. Read more