One effect of the persistently cold winter of 2013-2014 is showing up on the world’s largest group of freshwater lakes.
According to an analysis by NOAA’s Great Lakes Environmental Research Laboratory, ice covered 78.7 percent of the Great Lakes on February 6. Not since early 1996 has ice been so widespread on the Great Lakes.
This is an abrupt turn around from the past four winters, during which the peak ice coverage remained around 40 percent or less. As you can see in the graph below, the 40-year average is just over 51 percent.