Lake Superior dropped more than usual in December

Seasonal decline expected to continue all winter.
Waves splash against Wisconsin Point near the Superior Entry recently. The level of Lake Superior continues to fall away from record territory, the International Lake Superior Board of Control reported Friday. (Jed Carlson /

Lake Superior continued to drop in December as the big lake edges farther away from record-high water levels.

The International Lake Superior Board of Control reports that the level of Lake Superior dropped 4.7 inches in December, more than the average 3.2-inch December decline.

The big lake now sits 8.3 inches above average but is 6.3 inches below the level of Jan. 1, 2020.

Lake Superior generally rises from April to September and then falls over the late fall and winter months.

Meanwhile Lakes Huron and Michigan dropped 1.6 inches in December, slightly less than the usual 2-inch decline for the month. The lakes now sit 31.9 inches above average but 5.5 inches below the Jan. 1 level of 2020.


The upper Great Lakes are expected to continue their usual seasonal declines in January. However, board officials warn that there will continue to be an increased risk of shoreline erosion, lakeshore flooding and coastal damages over the next several weeks and potentially through the winter.

John Myers reports on the outdoors, natural resources and the environment for the Duluth News Tribune. You can reach him at
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