National Weather Service Weather Forecast Office

As the graph below shows, Lake Superior has risen 3 inches over the past month.  While this may not seem like a lot at first, remember that Lake Superior is nearly 32,000 square miles in size or about the size of South Carolina!  This rise in lake level is significant given the fact that by this time of the year Lake Superior is typically at its climatological peak. This increase in the lake level was the result of above normal precipitation during the month of August across portions of the Lake Superior basin which covers parts of Ontario, Minnesota, Wisconsin and Upper Michigan. As of September 3rd, Lake Superior is 5 inches below its long term average of 602.2 feet and 2 inches above the level from one year ago.  

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