2019-Aug-18
August 18 Water Levels Report
Although Great Lakes water levels are beginning their seasonal declines, they remain near record high levels. Over the last month Lakes Michigan-Huron, St. Clair, and Erie have declined 2 to 4 inches, Lake Superior is unchanged and Lake Ontario has declined by 10 inches. The projected net change in levels over the next month show water levels declining by 2 inches on Lakes Superior and Michigan-Huron, by 5 to 6 inches on Lakes St. Clair and Erie, and by 12 inches on Lake Ontario.
Lake Superior’s outflow through the St. Mary’s River and the Lake Michigan-Huron’s outflow through the St. Clair River are predicted to be above average for August. Outflows from Lake St. Clair through the Detroit River, and outflows from Lake Erie outflow into the Niagara River, are also projected to be above average in August. Likewise, Lake Ontario’s outflow through the St. Lawrence River is forecasted to be above average for August.
