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Kitchi-Gami
Almanac
Lake Levels Headed into Winter
At the beginning of January, Lake Superior was 6 inches higher than at
the same time in 2009 but still about 3 inches below its long-term
average for the time of year, according to the U.S. Army Corps of
Engineers.
Traditionally, Lake Superior loses water in December and January (and
throughout the winter months). While on average, the lake loses about 3
inches in December, in 2009 the lake levels diminished by only about 2
inches thanks to good precipitation for the month that put the water
supply into the lake above average, reported Melissa Kropfreiter, an
hydraulic engineer in the Corps’ Detroit District office. The lake’s
water level is projected to lower by about 3 inches in January.
Meanwhile, lakes Michigan and Huron (combined totals) were 7 inches
higher going into January than the same time in 2009, but 6 inches
below their long-term averages. The two lakes fell 3 inches in
December, an increase over their average of 2 inches of loss in that
month.
History Notes
 Feb. 22, 1904: Michigan skier Thomas
Walters sets a world record 82-foot ski jump at a first national ski
tournament in Ishpeming, Michigan. (Michigan History Magazine)
Feb. 23, 1909: The town of Mercer is
founded. (Wisconsin Historical Society)
March 6, 2000: Duluth becomes the first
U.S. city to ban the sale of mercury thermometers. (Minnesota
Historical Society)
March 24, 1975: Nolalu, Ontario, gets
101.6 centimetres (40 inches) of snow, setting an Ontario record for
the most snow in 24 hours. (Environment Canada)
Lake Levels
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| The levels on the
hydrographs are shown in both feet
and
meters above (+) or below (-) Chart Datum. Chart Datum, also known as
Low Water Datum, for Lake Superior is 601.1 feet (183.2 meters). It is
a reference plane to which water depth and Federal navigation
improvement depths on navigation charts are referred. |
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