Waterways Ontario
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Great Lakes Water Levels
Levels are Up for Now. Will they Continue?

Imagine mowing the lawn where you used to go swimming. 


Water levels in the Great Lakes have dropped significantly over the last few years and whether that is the natural ebb and flow that has continued for centuries, or it is an indication of a greater threat is still under discussion.


Certainly the ice coverage and snow of the winter of 13-14 has reversed the trend, at least for this summer.   As of mid June, Lake Superior is 33 centimeters (13 inches) deeper than it was this time last year.  Levels in Lake Huron and Georgian Bay are 30 centimeters (12 inches) higher than what they were a year ago.  Both Lake Superior and Huron/Georgian Bay are expected to rise about 7 centimeters (2 to 3 inches) over the next month.


Lakes St Clair and Erie are nearly 18 centimeters (7 inches) up, and Lake Ontario is more than 20 centimeters (8 inches) deeper than a year ago.  The prediction is that Lake St Clair will remain the same over the next little while, Lake Erie will decline 2.5 centimeters (1 inch) and Lake Ontario will decline 10 centimeters (4 inches). 



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