September 2021
September 19 Water Levels Report
This month outflows from Lake Superior into the St. Mary’s River are predicted to be below average, not above average as they have been for almost 3 years prior to the spring of 2021. This shows that, under Plan 2012 balancing, the flow into Lake Michigan-Huron continues to be reduced. -
Lake Michigan-Huron continues to be below the level it was at this time last year – see first graph below. All the lakes are now lower than they were at this time last year. -
From a month ago the water levels on Lakes Superior, Michigan-Huron, St Clair, Erie and Ontario are down 1, 3, 5, 6 & 2 inches respectively. Lakes Superior, Michigan-Huron, St Clair, Erie & Ontario, are lower by 11, 16, 11, 7 & 2 inches, respectively, than they were at this time last year. Lakes Michi
