Undercurrents: beneath the obvious

January 4, 2007

Great Lakes Water Level Update for January 2007

Filed under: Lake Levels — nemo @ 9:44 pm

The water level in Lake Superior is currently 12 inches lower than it was a year ago and slightly higher than the record low recorded last month. The water levels in the remaining lakes are 5 to 12 inches higher than they were a year ago.

Presently, all of the lakes are in their period of seasonal decline. Over the next month, water levels on Lakes Superior are expected to drop 3 inches while Lakes Michigan-Huron and Erie are expected to drop 1 inch each. Water levels in Lake St. Clair, however, are projected to rise 1 inch over the same period and Lake Ontario is predicted to remain the same.

Lake Superior is predicted to remain well below last year’s levels, while Lakes Michigan-Huron, St. Clair, Erie, and Ontario are forecasted to remain above the water levels of a year ago.

Due to abnormally dry conditions on the Lake Superior basin over the last five months, Lake Superior’s water level is currently below chart datum and is expected to remain below datum through April.

The last time Lake Superior was this low at this time of year was in January 1926.

Source: U.S. Army Corps of Engineers

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