Source:
Channel 3000 MadisonThe corps says this summer's level on Lake Superior will be 13-15 inches below 2010, and about 13 inches below its historical average.
It tells The Detroit News that lakes Michigan and Huron will be 7-12 inches below 2010 and about 22 inches below average.
It says Lake St. Clair will be seven inches below 2010, and a foot below average, while Erie will be 6 inches below last year and the average.
Read more:
http://www.channel3000.com/goinggreen/27115806/detail.html
They don't give any reasons. Does it always fluctuate this much?