International Lake Superior Board of Control

While Lake Superior and Lake Michigan-Huron water levels remain above average, the risk of high-water impacts remains.  Lake Superior outflows continue to be set in consideration of high levels upstream and downstream.

Lake Superior and Lake Michigan-Huron water levels continue to decline, but are still well above average and the risk of high-water impacts remains.  Lake Superior outflows continue to be set in consideration of high levels upstream and downstream.

Lake Superior generally remained stable over the course of the month, which is typical for this time of year. Lake Michigan-Huron declined 4 cm (1.6 in) over the course of the month, which is the average water level decline in August.

Basin conditions were generally wetter than average in July. As a result, water levels rose on Lake Superior and remained stable on Lake Michigan-Huron.