News Releases

December, like October and November, saw wet conditions across the upper Great Lakes basin, and water levels of Lake Superior and Lake Michigan-Huron remain well above average. The above-average levels coupled with strong winds and waves continue to result in shoreline erosion and coastal damages…

Following extremely wet conditions in October and relatively wet conditions in November, water levels of Lake Superior and Lake Michigan-Huron remain well above average.

The International Lake Superior Board of Control, under authority granted to it by the International Joint Commission (IJC), advises that the gate setting of the control structure at the head of the St. Marys Rapids will be reduced prior to winter, beginning next week.

Extremely wet weather and a significant rise in Lake Superior levels will result in St. Marys River outflows being increased in November.

During a relatively wet September, Lake Superior rose 4 cm while on average Lake Superior begins its seasonal decline in September. Conditions were closer to average downstream and Lake Michigan-Huron declined 6 cm in September.

At the beginning of September, Lake Superior is 14 cm above average (1918 – 2017), but 11 cm below the level at this time last year. Lake Michigan-Huron is currently 43 cm above average, and at the same level as last year’s beginning-of-September level.
The International Lake Superior Board of Control, under authority granted to it by the International Joint Commission (IJC), advises that the gate setting at the head of the St. Marys Rapids will be adjusted this week. Anglers and other users of the St. Marys Rapids need to be cautious of the…
At the beginning of August, Lake Superior is 13 cm above average (1918 – 2017), but 9 cm below the level at this time last year. Lake Michigan-Huron is currently 39 cm above average, but 4 cm below last year’s beginning-of-August level.

The International Lake Superior Board of Control, under authority granted to it by the International Joint Commission (IJC), advises that the gate setting at the head of the St. Marys Rapids will be adjusted on Monday, 23 July 2018.

Conditions in the Lake Superior and Lake Michigan-Huron basins were near average last month and the seasonal water level rise continued on both lakes. At the beginning of July, Lake Superior is 11 cm above average (1918 – 2017), but 14 cm below the level at this time last year.