Lake Superior, the largest freshwater lake in the United States, experienced its lowest water levels in a decade in 2024. According to NOAA, the lake's level at Grand Marais was over half a foot lower than in 2023. This significant drop raises concerns about its impact on shipping, ecosystems, and human health.
What's New Lake Superior , the largest freshwater lake in the United States and a critical natural resource, experienced its lowest water levels in a decade in 2024.According to the National Oceanic and Atmospheric Administration , the lake's level at Grand Marais in Minnesota was 601.5 feet at the start of November, more than half a foot lower than at the same time in 2023.
Warmer temperatures, reduced ice cover and increased evaporation exacerbate water loss, while shifting precipitation patterns further contribute to variability.What to KnowDrought was a defining factor in Lake Superior's 2024 water levels. Despite intense storms and lake-effect snow in recent weeks, much of the Midwest and Northeast remained abnormally dry, with 40 percent of the Midwest still in drought as of December, according to the U.S. Drought Monitor.
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