Is Lake Michigan expected to rise?

According to the average of their simulation ensemble, by 2040–2049, the average annual water levels of Lake Superior, Michigan-Huron, and Erie are projected to increase by 0.19, 0.44, and 0.28 m, respectively, relative to 2010–2019 under the Representative Concentration Pathway (RCP) 8.5 scenario.



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Lake Michigan water levels are high and will keep rising, but nowhere near record levels.

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The water level on Lake Michigan fell one inch from July 11, 2023 to Aug. 11, 2023. The current lake level is just under 580 feet, which is still about 5 inches above the long-term average for the month and approximately 4 inches below the lake level at the same time last year.

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Those findings are consistent with a study from Michigan Technological University. That study found Lake Superior is expected to rise on average by 7.5 inches while levels on the Lake Michigan-Huron system is projected to increase 17 inches by 2050 due to climate change.

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According to the average of their simulation ensemble, by 2040–2049, the average annual water levels of Lake Superior, Michigan-Huron, and Erie are projected to increase by 0.19, 0.44, and 0.28 m, respectively, relative to 2010–2019 under the Representative Concentration Pathway (RCP) 8.5 scenario.

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That study found Lake Superior is expected to rise on average by 7.5 inches while levels on the Lake Michigan-Huron system is projected to increase 17 inches by 2050 due to climate change.

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Over the past two years, the water level declines have been a little more than average and the water level increases have been less than average. This is especially true on Lakes Michigan and Huron.

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Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels.

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Climate change will exacerbate a range of risks to the Great Lakes, including changes in the range and distribution of some species, increases in invasive species and harmful blooms of algae, and declines in beach health. Ice cover declines will lengthen the commercial navigation season.

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In the spring, the water surface warms. This causes the temperature of the top and bottom layers of the lake to equalize. With the help of strong winds, this new equilibrium breaks the thermal stratification, and the lake is able to mix.

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It is just one of the Great Lakes experiencing warming temperatures. All of the Great Lakes—Superior, Michigan, Huron, Erie and Ontario—have been warming for the past several decades. Scientists put this mainly down to climate change.

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While the Great Lakes will freeze over partially during the winter, they almost never freeze completely. This is mainly due to their size. The Great Lakes are too large to freeze over entirely on a regular basis.

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10% of the entire planet's fresh water are contained in one inland sea. The amount of snow that gets melted and runs into the Great Lakes each year is so vast, that there is zero chance of running low. Droughts don't exist up there. Here in Perth Western Australia we have a dam, little rain and treated water.

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When the lake is deep, and the angle of incoming light is smaller, Lake Michigan's color appears deep blue. This is because the light travels down with little obstructions and dissipates far below the surface. The light then appears darker in the visible spectrum.

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Swimmers didn't find it too appealing, but it was popular for those who wanted to fish for trout. However, an analysis of satellite images between 1998 and 2012 showed that Lake Michigan and Lake Huron are now clearer than Lake Superior, which had always been the clearest of the Great Lakes in the past.

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Swift Currents At Lake Michigan Are The Real Danger The shapes of these waves are what contribute to rip tides, which are one of the most dangerous things swimmers can encounter in the water. Lake Michigan's riptide and longshore tides are unparalleled when it comes to danger among all the Great Lakes.

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You can read more about this as well as other myths about water level fluctuations in this blog. Over the next 6 months, Lake Michigan water levels are predicted to be below last year's levels, but remain above long term average water levels indicated by the dashed blue line in the image below.

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Although the total volume in the lakes is vast, on average less than 1 percent of the waters of the Great Lakes is renewed annually by precipitation, surface water runoff, and inflow from groundwater sources.

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In winter, the precipitation amounts decline in the colder air. A loss of water level basically comes down to more water flowing out and evaporating than falling as precipitation.

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Pollution from over a century of intensive development remains in the sediment of many Great Lakes tributaries, harming fish and wildlife and leaving water unsafe for people. These sites are being cleaned up through the Great Lakes Legacy Act by the U.S. EPA in partnership with local, state, and private organizations.

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