You failed to mention the basics of lake effect snow. It is caused by cold air moving across a warm lake. The warmer the lake and the colder the air, the more moisture can be picked up and thus, more snow. The snow is not heavy, it generally is light and fluffy.
You failed to read and understand the article since the article covers the basics of lake effect snow either explicitly or implicitly: "
"The Lake Effect snows essentially stop when the Great Lakes freeze. No moisture from frozen lakes to power the local snows."
But if one does not understand the basics as I stated above, one would not understand WHY it stops when the lakes freeze. You can take in and read information, it doesn't mean you learned something or that you understand it.
This is one point where I am afraid I disagree with the prediction. Just because the Washington Baltimore area has had 3 winters of below normal snowfall, does not mean that we will tend to receive less snowfall on an annual basis. Just three years ago, we had 70 to 90 inches of snow in the area, in 2002-3, we had almost 60 and in 1995-96 we had over 60. This is more snowfall in these 3 single winters than we had seen since records began in 1871. The statistics would bear me out on this. Even with warming, things follow patterns, and low snowfall winters, are just as normal as high snowfall winters. In the 1950's we had many winters of low snowfall, no one was talking warming then, a decade later was the snowy sixties. So, to say, you have to go to the Great Lakes to see snow from now on, to me is not accurate.